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  • 51.
    Johansson, Anna-Maria
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Grip, Helena
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Radiofysik.
    Strong, Andrew
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Selling, Jonas
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Boraxbekk, Carl-Johan
    Umeå universitet, Samhällsvetenskapliga fakulteten, Demografiska databasen.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Three dimensional kinematic analyses of movement control of individual fingers post-stroke2015Inngår i: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 42, nr Supplement 1, s. S33-S33Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Research question: Objectives of the present study are: (1) to quantify finger movements in a 3D context and (2) by this method investigate the ability to perform individualized finger movements, with and without vision of the hands, in persons with a chronic stroke diagnosis compared to able-bodied controls.

    Introduction: Increased knowledge of how fine movement control is affected by stroke is important for the understanding of recovery of function. This is crucial for the development of reliable and valid assessment methods for evaluation of rehabilitation of the upper limbs. This study is part of the MOST project (MOST-MOvement control in STroke) where both clinical tests and 3D movement assessments are performed.

    Materials and methods: At present, 18 persons post-stroke (M age = 67 years; 6 women) and 26 able-bodied controls (M age = 62 years, 11 women) have participated. The ability to perform uni-manual individualized finger movements and the effect of vison of the hands were evaluated. Participants were instructed to move a specific finger in cyclic extension–flexion movements at the metacarpophalangeal joint, keeping the rest of the finger straight and the other fingers still, at a self-paced speed during 10 s (2 test series for each hand; 8 test series in total). The task was performed seated. The wrists were extended about 10° and fixated to a wooden frame with forearm support. Reflective markers were affixed to each fingertip and movements were recorded by optoelectronic cameras. Based on the positional change of the fingers during task performance, two indices ranging from 0-1 were calculated: (1) Individuation index (II) where the independence of each finger movement is shown and where 1 indicate complete independence, (2) stationary index (SI) where 1 indicate that the finger remains still when the other fingers move [1].

    Results: Our results show that it is possible to quantify individual finger movements by use of 3D movement analysis addressing the quality of movement performance in stroke survivors: all but 3 persons post-stroke were able to perform the task. Preliminary analyses (based on a subsample constituted of 8 post-stroke and 8 controls) verify that the test discriminated between groups where participants post-stroke had lower values on II and SI as compared to the control persons, the lowest values were observed for the middle and ring fingers. Ongoing analyses will show if vision influences the outcomes.

    Discussion: A set-up has been tested where individual finger movements can be quantified in 3D, and that discriminates between persons post stroke compared to controls. This advancement carries a promise for development of better assessment methods for recovery of function post-stroke.

    Reference

    [1] C. Häger-Ross, M.H. Schieber Quantifying the independence of human finger movements: comparisons of digits, hands and movement frequencies.J Neurosci, 20 (2000), pp. 8542–8550

     

     

  • 52.
    Johansson, Anna-Maria
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rudolfsson, Thomas
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi. Centre for Musculoskeletal Research, Department of Occupational Health Sciences and Psychology, University of Gävle, Gävle, Sweden.
    Bäckström, Anna
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    von Hofsten, Claes
    Department of Psychology, Uppsala University, Uppsala, Sweden.
    Rosander, Kerstin
    Department of Psychology, Uppsala University, Uppsala, Sweden.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Development of motor imagery in school-aged children with autism spectrum disorder: a longitudinal study2022Inngår i: Brain Sciences, ISSN 2076-3425, E-ISSN 2076-3425, Vol. 12, nr 10, artikkel-id 1307Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Autism spectrum disorder (ASD) is a diagnosis based on social communication deficits and prevalence of repetitive stereotyped behaviors, but sensorimotor disturbances are commonly exhibited. This longitudinal study aimed at exploring the development of the ability to form mental motor representations (motor imagery; MI) in 14 children with ASD and 17 typically developing (TD) children at 7, 8 and 9 years of age. MI was investigated using a hand laterality paradigm from which response times (RT) and error rates were extracted and compared with performance on a visually based mental rotation task (VI). A criterion task was used to ensure that the children could perform the task. The results showed wide performance variability in the ASD group with more failures than TD in the MI criterion task, especially at 7 years. For all age levels and both the MI and VI tasks, the error rates were significantly higher and RTs longer for the ASD group compared with TD. Signs of MI strategies were however noted in the ASD group as biomechanically constrained orientations had longer RTs than less constrained orientations, a RT pattern that differed from the VI task. The presence of MI in the ASD group was most evident at 9 years, but the error rates remained high at all ages, both in the MI and VI task. In comparison, the TD group showed stable MI strategies at all ages. These findings indicate that MI ability is delayed and/or impaired in children with ASD which may be related to difficulties performing required mental rotations.

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  • 53.
    Johansson, Anna-Maria
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Timing and rhytmicity training of children with cerebral palsy2009Inngår i: Developmental Medicine and Child Neurology 51 (Suppl. 3) Vilnius, Litauen, 3-6 juni, 2009, Wiley Online library, Mac Keith Press , 2009, s. 28-29Konferansepaper (Fagfellevurdert)
  • 54.
    Jonsson, Bert
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Prospective head tracking: head movements, accuracy and timing in relation to a circular object motion2009Inngår i: Current Psychology Letters: Behaviour, Brain & Cognition, E-ISSN 1379-6100, Vol. 25, nr 1, s. 1-15Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this study, kinematic and video recordings were made of the eye- and head tracking of an object revolving in a vertical plane in two groups of infants (6- and 12-month-old) and one group of adults. The study had two purposes. The first concerned infants' abilities to negotiate the target trajectory when being forced to extensively recruit the head. The second addressed the question whether the same underlying neural controller drives both eye- and head motor systems. It was found that head tracking ability is functional already in 6-month-old infants. However, infants of both age groups displayed more extensive head movements and less accuracy compared to adults. This finding is in line with previous research on one-dimensional horizontal head tracking in infants. Infants also showed less developed timing between head movements and vertical object motion, supporting the argument that both eye- and head tracking have a common developmental trajectory.

  • 55.
    Lenfeldt, Niklas
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för farmakologi och klinisk neurovetenskap, Klinisk neurovetenskap.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi. Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Alterations in white matter microstructure are associated with goal-directed upper-limb movement segmentation in children born extremely preterm2017Inngår i: Human Brain Mapping, ISSN 1065-9471, E-ISSN 1097-0193, Vol. 38, nr 10, s. 5051-5068Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Altered white matter microstructure is commonly found in children born preterm (PT), especially those born at an extremely low gestational age (GA). These children also commonly show disturbed motor function. This study explores the relation between white matter alterations and upperlimb movement segmentation in 41 children born PT (19 girls), and 41 children born at term (18 girls) at 8 years. The PT group was subdivided into extremely PT (E-PT; GA = 25–27 weeks, N = 10), very PT (V-PT; GA = 28–32 weeks, N = 13), and moderately PT (M-PT; GA = 33–35 weeks, N = 18). Arm/hand preference (preferred/non-preferred) was determined through object interactions and the brain hemispheres were designated accordingly. White matter alterations were assessed using diffusion tensor imaging in nine areas, and movement segmentation of the body-parts head, shoulder, elbow, and wrist were registered during a unimanual goal-directed task. Increased movement segmentation was demonstrated consistently on the preferred side in the E-PT group compared with the term born group. Also compared with the term born peers, the E-PT group demonstrated reduced fractional anisotropy (FA) in the cerebral peduncle (targeting the corticospinal tract) in the hemisphere on the non-preferred side and in the splenium of corpus callosum. In contrast, in the anterior internal capsule on the preferred side, the E-PT group had increased FA. Lower FA in the cerebral peduncle, but higher FA in the anterior internal capsule, was associated with increased movement segmentation across body-parts in a contralateral manner. The results suggest that impaired development of sensorimotor tracts in E-PT children could explain a sub-optimal spatiotemporal organization of upper-limb movements.

  • 56.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    A critical examination of the Moro response in newborn infants--symmetry, state relation, underlying mechanisms1995Inngår i: Neuropsychologia, ISSN 0028-3932, E-ISSN 1873-3514, Vol. 33, nr 6, s. 713-726Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The primary purpose of the present study was to analyze quantitatively the vestibular evoked Moro response, and the symmetry of the movement pattern involved, as the traditional descriptions bring about. Another aim was to determine the segmental movements involved and determine whether the components of the Moro response are dependent on changes in the infant's behavioral state. Another question concerns whether the form of these movements changed over repeated trials on the same day, or from the first to the fifth day after birth. Vestibular evoked Moro responses of 52 neonates, 1–5 days of age, elicited in different behavior states (State 1–5), were examined and quantitatively analyzed. The response was evoked by a predefined, rapid, downward, vertical body motion, without any dorsiflexion of the infant's head. Optoelectronic device (SELSPOT II) were used to monitor the arm/hand movement patterns involved in the response. The three-dimensional movement pattern in space, duration, velocity, latency, and the acceleration of both arms/hands were analyzed in relation to the infant's behavioral state. The response movements were structured into phases of abduction/extension, adduction/flexion and the extension/flexion of the fingers. The vestibular stimulation used was found to be sufficient for eliciting an adequate Moro response. The segmental movement pattern of the Moro response was found to be sensitive to the infant's behavioral state at the time when the response was elicited. This was found in the movement pattern, duration, latency, and the velocity of the response. The response was found to be asymmetrical, in 82% of the infants it was found to be a predominant shorter onset latency of the right arm, in 12% the opposite was found. These findings suggest that there is a fundamental, spinal asymmetry involved in the Moro response which is subject to supraspinal influences emanating from the vestibulospinal system. No differences were found between 1 and 5 days of age for any of the scoring categories, and no differences were found within groups over six successive trials.

  • 57.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Arm and hand movements in neonates and young infants1993Doktoravhandling, med artikler (Annet vitenskapelig)
  • 58.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Developmentally, the arm preference precedes hendedness2003Inngår i: Behavioral and Brain Sciences, ISSN 0140-525X, E-ISSN 1469-1825, Vol. 26, nr 2, s. 238-239Artikkel i tidsskrift (Fagfellevurdert)
  • 59.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Early identification2013Manuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    L Rönnqvist reveals how improved understanding of preterm neonatal behavioural-brain development will enable timelier, better-informed clinical interventions, ultimately leading to the prospect of a better quality of life for children born prematurely.

  • 60.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Fysisk aktivitet: nödvändigt för hjärnan2016Inngår i: Förskoletidningen, ISSN 1402-7135, Vol. 41, nr 4, s. 16-19Artikkel, forskningsoversikt (Annet (populærvitenskap, debatt, mm))
    Abstract [sv]

    Fysisk aktivitet har positiva effekter på vår hjärnas tidiga utveckling och leder bland annat till bättre kroppsuppfattning, självbild och sociala färdigheter. Mycket tidigt, redan under de första levnadsåren, läggs grunden till en positiv utveckling.

  • 61.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Intrauterina störningar och risker som påverkar utvecklingen av hjärnan och den "lilla kroppen"2008Inngår i: JordeModern, Vol. 4, nr 121, s. 10-15Artikkel i tidsskrift (Annet vitenskapelig)
  • 62.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Long-term effect of a very preterm birth on sport activities, laterality and cognitive functioning in early school age children2017Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 59, nr S2, s. 44-44, artikkel-id 114Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    INTRODUCTION: Neuro-motor impairments are commonly described in children born very preterm. Our purpose was to examine whether children born preterm differ concerning choice and amount of sport activities, laterality, and cognitive functioning in comparison to term born.

    METHOD: A sample of 130 children, investigated at early school-age (mean = 7.8y); categorized into three groups based on gestational age (GA); 66 children term born (FT; GA 39 – 42w), 33 moderately preterm (M-PT; GA 34 – 36w), and 31 very preterm (V-PT; GA 23 – 33w). Sport activities were perceived from parents’ ratings; Activities scale/Child behavior checklist, Laterality Index (LI); by a modified Edinburgh Handedness inventory, and cognitive functioning by WISC-IV.

    RESULTS: Children born M-PT performed comparable to FT, as regards to sport activities and cognitive performance. Children born V-PT had significantly poorer full scale IQ, lower sport performance, fewer sport activities, and participated in more individual sport activities in comparison to FT and M-PT. V-PT children were also less lateralized in comparison to FT and M-PT born.  Additionally, a significant positive correlation was found between LI and number of sport activities for the V-PT children, not found for the FT or M-PT.

    CONCLUSUON: A very preterm birth seems to generate long-term effects on amount and choice of sport activities, side preference and cognitive functioning. Thus, more focus should be paid to children born very preterm to identify deviations in their early sport engagement and activities; consequently, to motivate and provide improvements in their sport activities, physical performance, and cognitive functioning.

  • 63.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    The key to understanding the origins and nature of human language2007Inngår i: Neuropsychology, ISSN 0894-4105, E-ISSN 1931-1559, Vol. 19, nr Nordic issue, s. 4-7Artikkel i tidsskrift (Fagfellevurdert)
  • 64.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Varför finns vänsterhänta?2018Inngår i: Forskning & Framsteg, ISSN 0015-7937, Vol. 52, nr 1, s. 63-64Artikkel, forskningsoversikt (Annet (populærvitenskap, debatt, mm))
  • 65.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Är det sant att konsnärer ofta är vänsterhänta?2014Inngår i: Forskning & Framsteg, ISSN 0015-7937, Vol. 8, s. 61-Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 66.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Är vänsterhänta speciella?: [Frågesvar]2014Inngår i: Modern Psykologi, ISSN 2000-4087, nr 10, s. 80-81Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 67.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Quantitative assessment of right and left reaching movements in infants: a longitudinal study from 6 to 36 months2006Inngår i: Developmental Psychobiology, ISSN 0012-1630, E-ISSN 1098-2302, Vol. 48, nr 6, s. 444-459Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This longitudinal study aimed to explore the early presence and developmental pattern of laterality in reaching kinematics and its relationship to side use. In order to do so, 3-D kinematic measurements as well as 2-D video recordings of right-left reaching movements were successively carried out for 17 infants at the ages of 6, 9, 12, and 36 months. Additional investigations of hand preference were made at 36 months. As four infants were prematurely born, their outcomes were compared to those of the fullterm participants. While most of the infants in the early ages showed a rather inconsistent preference in terms of frequency and distributions of right-left side use, the analyses of reaching kinematics revealed a more consistent pattern of fewer movements units (MUs) and straighter right-sided reaching for the majority of infants at all tested ages. However, reaching kinematics from the preterm infants were generally more variable and less side consistent. It is proposed that the development of human handedness originates from an early right arm rather than hand preference in that representations of asymmetry in bilateral projections (involved in arm movements) developmentally precede contralateral projections (involved in refined hand/finger movements).

  • 68.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi. Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Associations between manual dexterity scores from the M-ABC 2 and kinematic properties of goal-directed upper-limb movements and in school-aged children born preterm2016Inngår i: Challenge the Boundaries: Abstract book, 2016, s. P-Fr-135-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Background: Children born preterm (PT; <38 gestational weeks, GW) are frequently reported to have deviations in motor proficiency. Most studies use standardized test batteries to determine motor function in these children. Few studies have however examined the relations between test battery outcomes and outcomes from more detailed movement analysis.

    Aim: To investigate associations between outcomes on the manual dexterity subtests from the Movement-ABC 2 with detailed 3D kinematic registrations during performance of a sensorimotor task with demands on fine motor skills and precision in school-aged children born PT and a comparison group born at full-term (FT).

    Methods: As part of an ongoing quasi-longitudinal study, 7-8 year old children born PT (< 36 GW; n = 17) and an aged matched typically developing comparison group (n = 19) performed the M-ABC 2 and a fine motor task where 3D kinematic registration technique was applied. M-ABC 2 scaled scores from the manual dexterity index (MDI) were correlated with kinematic parameters sensitive to planning and on-line control (movement units, distance and speed). Differences between the PT and FT group were also analyzed.

    Results: Preliminary analyses show no group differences on the outcomes from the 3D kinematic analyses but differences were evident on two (peg-board and follow-track) of the subtests constituting the MDI and the MDI where children born PT have lower scores than FT. For both groups but in different ways, within-group correlations show some associations between extracted kinematic properties and dexterity outcomes.

    Conclusions: As the groups differed on the MDI outcomes it is surprising that none were found on the kinematic properties examined. Further, relatively few associations were found between the kinematic and M-ABC 2 outcomes. Investigation of the influence cognitive and executive functions have on these performances may offer explanations for this inconsistency

  • 69.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Magnus
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
    Faroogi, Aijaz
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
    Cognitive performance and behavioral functions in relation to gestational age (GA) at birth2015Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 57, nr Suppl s4, s. 21-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Introduction:

    It is well established that a very preterm birth (PT) relates to increased behavioral problems. The aim of this study was to investigate effects and associations between different gestational ages (GA) at birth (term, late-to-extreme) and later functions. This study is part of an ongoing, longitudinal project.

    Participants and Methods:

    Test outcomes from WISC-IV and Achenbach’s Child-Behavior-Checklist (CBCL) in children tested at 7-8-years (M=7.7) were used to investigate group differences as effect of GA at birth. In total, 64 preterm born (PT), GA range 22-36, (divided into groups of 14 extremely-PT/EPT, 17 very-PT/VPT, and 33 moderately PT/MPT) and 64 term born (TB), were included. Additionally, associations between GA, birth weight (BW), and outcomes from WISC-IV and CBCL were investigated.

    Results:

    Multivariate analyses of variance (MANOVA) revealed significantly (p < .05) poorer WISC outcomes on Verbal Comprehension Index, Perceptual Reasoning Index, and on Full-Scale-IQ for children born EPT/VPT in comparison to MPT and TB born. Parents’ CBCL ratings reveled that EPT children had significantly higher prevalence of Attention problems, Thought problems, Aggressive and Somatic complaints. Including the PT-group only shown significant positive correlations between GA/BW respectively and full scale IQ. Higher GA/BW was related to increasing IQ scores.  Significant negative correlations were seen between GA/BW respectively and TotProblem/CBCL-scale. Additionally, CBCL/DSM-Oriented Scales; Adhd-, Opposite-, and Conduct-Problems correlated significantly negative with GA/BW in the PT-born children.

    Conclusion:

    Our study provides further support for associations between increased risk of cognitive and behavior problems with decreasing GA/BW at birth.

  • 70.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi. Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Faroogi, Aijaz
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Pediatrik.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
    Lindqvist, Thomas
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
    Birgander, Richard
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
    Effects of twin-births on IQ, handedness, and brain volumes in 8-years-old preterm born twins and matched singletons: a pilot study2016Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 58, nr S6, s. 57-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Children born preterm have a high prevalence of long-term cognitive and behavioral disturbances. Still, studies of how preterm-twin-births may effect brain maturation and thus, contribute to long-term effects on brain-behavioral development and functions are rare.

    Aim: To investigate whether brain volumes differ between twin (TPB) and singleton preterm born (SPB) and full-term born children (FTB) and associate to long-term cognitive and behavioral outcomes as well as to gestational age (GA), birth weight (BW) and head circumference (BHC) at birth.

    Method: A sample of 22 twin born preterm (Mean GA=32.1, BW=1781), 23 matched singletons preterm (Mean GA=31.8, BW=1751), and 22 full-term singletons were included. All children were investigated by means of their cognition functions (WISC-IV), handedness performance index and brain volumes (3 Tesla MRI) at early school ages (M=7.8y) in 40 children (9 TPB, 10 SPB, 21 FTB).

    Results: The FTB-children performed better than both TPB and SPB on cognitive performance, and showed higher IQ. Brain volumes, especially Gray matter were stronger associated with IQ in the twins. Furthermore it was found that the SPB singletons had smaller Total Brain volume and less Grey Matter than FTB. The twins showed a higher prevalence of non-right handedness associated to GA, than both SPB and FTB. Independently of birth status, GA, BW and BHC were found to correlate positively with IQ, Total Brain volume, and Gray-and White matter volumes.

    Conclusion: Discordant handedness in TPB children and associations to lower GA indicate effect of twin-births on early functional laterality. The overall associations found between low GA/BW and smaller BHC at birth in preterm born and associations with lower IQ and smaller brain volumes at 8-y indicate that a very preterm birth are a higher predictor for long-term effects on brain development and cognitive performance than twin-birth per se.

  • 71.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi.
    Lenfeldt, Niklas
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.
    Corpus callosum white matter microstructures links to cognitive performance and functional laterality in preterm and term born children2022Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 64, nr S3, s. 46-46, artikkel-id OC-096Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Introduction: Knowledge is lacking concerning long-term influences of preterm birth on action-cognition integrations related to corpus callosum (CC) maturation/myelination. Here, we investigate long-term-effects of preterm-birth on CC microstructures/organization in relation to cognition and functional-laterality.

    Patients and methods: The sample included 82 children, 41 term-born (M-age=8.1y), and 41 preterm-born (M-age=8.2y); subdivided into V-PT, (GA=25–32w, N=23), and M-PT, (GA=33–35w, N=18), without major brain-deficits. DTI performed in 3T-MRI-scanners, generated maps of CC Genu, Truncus, Splenium (FA, MD, AD, RD-values). Results from WISC-IV (verbal-comprehension-VCI, perceptual-reasoning-PRI, working-memory-WM, processing-speed-PS, FSIQ), and Laterality-index (hand-, foot-, eye-preference) were analyzed related to DTI-outcomes.

    Results: Significant group difference found regarding CC-FA-values (F(2,79)=5,3527, p=.006), post-hoc-test showed that VPT differed from term (p=.015) and MPT-born (p=.016), by lower FA-Genu, Truncus, Splenium. This pattern also found for MD, RD, and AD-values. Positive-correlations (p<.01) found between GA and all CC-FA-values, and negatively for all MD, RD and AD-Splenium. VPT-born showed lower (p=.005) FSIQ (M=93) than term (M=103). Correlations (p<.05) found between WM and CC-FA-values in Genu for VPT-born, and between CC-FA-values in Genu, Truncus and PRI-index (p<.01) for term-born. VPT-born showed lower Hand- and overall-laterality-index than term and MPT, and no significant correlations between laterality-index and CC-values. Term and MPT-children showed positive correlations (p<.01) between decreasing overall-laterality-index and FA-values, and negative for MD-Splenum, RD-Splenium and RD-Truncus. 

    Conclusion: DTI revealed evidence for long-term impact of very-premature birth on CC related to atypical hemispheric maturation and behavioral integrations compared to term-born controls. The findings highlight importance of including functional-laterality to models investigating brain white-matter-microstructures.

  • 72.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi. Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI).
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi. Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI). Umeå universitet, Medicinska fakulteten, Institutionen för integrativ medicinsk biologi (IMB), Fysiologi.
    Lenfeldt, Niklas
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.
    Long-term effects of a preterm birth on cerebellar volumes and myelination: links to children's cognitive and motor performance at 8-years of age2021Konferansepaper (Fagfellevurdert)
    Abstract [en]

    INTRODUCTION/BACKGROUND: Recent studies have found that a reduced growth of the cerebellum is associated with poorer scores on both general intelligence tests and motor balance tests (Matthews et al., 2018) in children born preterm (PT), and that lower test scores may be persistent in adolescents born very PT (Allin et al., 2001). Notably, even low-risk children born PT at 9-years of age have been reported displaying regional brain volume reduction in the cerebellum (Arhan et al., 2017). So far, however, few studies have been conducted on cerebellar volumes and the role of its myelinated content, and if/how cerebellar myelination is associated with cognitive and kinematic outcome performance in children born PT.

    To this end, the present study aim was to investigate whether cerebellar volumes were associated with gestational age (GA) and/or birth weight (BW) in a sample of children born PT (without known focal lesions) compared to controls (term born). We also wished to explore whether the cerebellum volumetric analyses, targeting the amount of myelinated content, would be linked to the children’s cognitive and motor performance. 

    PATIENTS AND METHODS: The sample consisted of 59 children investigated at early school-age (M = 8.17 years), 27 born PT (divided into moderately PT, MPT, and very PT, VPT) and 32 born full-term (FT). Brain scans were conducted by a 3.0-Tesla MRI scanner and Synthetic MRI (SyMRI) was used to investigate brain and cerebellar volumes and additionally, the amount of myelin content. Cognitive performance was assessed by the Wechsler Intelligence Scale for Children, 4th Edition (WISC-IV), and goal-directed upper-limb movement kinematics were recorded by a 6-camera, optoelectronic 3D registrations system (240Hz). 

    RESULTS: The results displayed reduced volumes of the cerebellum for children born VPT (see Table 1), and  smaller volumes were significantly associated with lower GA and BW. Children born VPT showed significantly lower full scale intelligence quotient (FSIQ) scores than children born MPT and FT. Overall, reduced myelinated content in the cerebellum was also significantly associated with lower FSIQ scores (see Fig.1). The children born VPT further displayed significantly poorer upper-limb kinematics than the other groups. However, no evident overall (independent of GA at birth) correlation was found between reduced volumes of the cerebellum and the kinematic performance. 

    CONCLUSIONS: A very preterm birth (< 32 weeks’ of gestation) increases the risk for long-term effects on cerebellar volumes, including less myelin content, and poorer cognitive and motor performance. The findings emphasize the importance of myelinated content in cerebellum and its role for cognitive function and upper-limb movement performance in children born very preterm. These findings merit for further longitudinal studies including bigger samples of both preterm and term born infants and children.

    Keywords: preterm, children, cerebellum, brain volumes, myelin, cognitive functioning, motor functioning

    References:

    Matthews et al., Longitudinal preterm cerebellar volume: perinatal and neurodevelopmental outcome associations. The Cerebellum, 2018, 17(5), 610-627.

    Allin et al., Cognitive and motor function and the size of the cerebellum in adolescents born very pre-term. Brain, 2001, 124(1), 60-66.

    Arhan et al., Regional brain volume reduction and cognitive outcomes in preterm children at low risk at 9 years of age. Child's Nervous System, 2017, 33, 8, 1317–1326.

  • 73.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI). Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
    Lindqvist, Thomas
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi.
    Birgander, Richard
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi.
    Long term effects of preterm births: associations between upper-limb kinematics, brain volumes and cognitive functions2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    INTRODUCTION and AIM: Studies of long-term outcomes linked to a preterm birth have generally found increasing amount of neurodevelopmental and cognitive disabilities and delays. Still, few have addressed the upper-limb performance by means of kinematic outcomes in associations with cognitive functions and brain volumes. Thus, the main aim of this study was to investigate such possible relationships within school age preterm born children and in relation to their gestational age (GA) at birth.

    PATIENTS/MATERIALS and METHODS: The present study is part of a longitudinal, ongoing multidisciplinary project with the goal to discover possible long-term effects of a preterm birth. In this sub-study 7-9-years-old children born preterm (PT) without early sign of neuropathology (N= 24, Mean GW=32, range 22-35) in comparison to age matched term born children (N=31) was included. Kinematics was measured by ProReflex, 3D-registration during task specific, bi- and uni-manual upper-limb movement performance. Additionally, functional brain volumes were investigated by 3-Tesla (T) magnetic resonance imaging (MRI) and cognitive functions by the Wechsler Intelligence Scale for Children, 4th edition (WISC-IV).

    RESULTS: Our preliminary results show significant poorer upper-limb kinematics with more segmented and longer movement paths in the PT-born children in comparison to the term born, this was particular evident for thus children born very- and extremely PT (<32 GA). In agreement with this finding, a decreased total brain volume and regional gray matter reduction were significantly correlated with more segmented arm and head movement trajectories, and with poorer general IQ outcomes, as well as with lower gestational ages.

    DISCUSSION and CONCLUSIONS: The findings from the present study show that a preterm birth, and especially a very- and extremely preterm birth, may cause long-term effects on the development of neurophysiology mechanism involved in the goal-directed upper-limb movements. Additionally, it shows that the development of the neuro-motor mechanisms also are associated with both cognitive functions and the general brain development. Thus, indicating that a very preterm birth seemingly still give neuro-developmental related problems when at school age.

  • 74.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Fagard, Jacqueline
    Université Paris Descartes, Paris, France.
    Droiters/Gauchers: Des asymétries dans tous les sens2004Inngår i: Neurosciences cognitives / [ed] Jacqueline Fagard, Marseille: Solal , 2004, s. 7-10Kapittel i bok, del av antologi (Fagfellevurdert)
  • 75.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Hopkins, Brian
    Department of Psychology, Lancaster University, UK.
    Head position preference in the human newborn: a new look1998Inngår i: Child Development, ISSN 0009-3920, E-ISSN 1467-8624, Vol. 69, nr 1, s. 13-23Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Head position preference was studied in 20 awake newborns who differed in terms of delivery and sex. They were placed supine on a custom-built platform to reduce the effects of gravity and asymmetries in trunk posture and skull shape. A global and a specific scoring method were used, the infants being in State 3 (quiet wakefulness) or 4 (active wakefulness, excluding crying). Delivery and sex did not account for differences in head position. The head turned more often to the right and was maintained longer in this position during State 3, regardless of scoring method. The maintenance of the head in midline was comparable in duration to that reported for infants at 2–3 months when using the global scoring method. This suggests that the neural mechanisms responsible for attaining and maintaining a midline position are present at birth, but are not functionally expressed due to a lack of adequate power in the antigravity muscles of the neck.

  • 76.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Hopkins, Brian
    Motor asymmetries in the human newborn are state dependent but independent of position in space2000Inngår i: Experimental Brain Research, ISSN 0014-4819, E-ISSN 1432-1106, Vol. 134, nr 3, s. 378-384Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Human newborns have a preference for turning and maintaining the head to one side of the body. Most studies confirm a right-sided preference in supine. Few have addressed the state dependency of this lateral bias, and even fewer have examined whether it is also expressed in the semi-upright position. We investigated whether it varies as a function of behavioural state and position in space. Kinematic recordings of head movements were made with the newborn secured on a platform in the supine or semi-upright position, which alleviated biomechanical and postural constraints imposed by gravity. Newborns differed as to whether they had a vertex, Caesarean or breech delivery. The majority of infants maintained a right-sided preference in both positions, but it was strongly mediated by state. Delivery type did not account for any lateral bias. These findings provide convincing evidence that a lateral bias in movement and positioning of the head are reflections of active neural processes rooted in the regulation of state.

  • 77.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Hopkins, Brian
    van Emmerik, Richard
    de Groot, Laila
    Lateral biases in head turning and the Moro response in the human newborn: are they both vestibular in origin?1998Inngår i: Developmental Psychobiology, ISSN 0012-1630, E-ISSN 1098-2302, Vol. 33, nr 4, s. 339-349Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Head turning after release from the midline and the Moro response to a full-body drop in 15 full-term newborns lying supine on a custom-built platform was studied. While the lateral bias for head turning was not as pronounced as for the Moro response, it was still assumed in the ratio of 2 (right):1 (left) as predicted by Previc (1991). Onset latency and time-to-peak acceleration were both significantly shorter in the right arm during the initial phase of the Moro response. For both measures, this right arm bias persisted over four consecutive elicitations in most infants. Vaginally delivered infants and those born by Caesarean section did not differ in terms of head preference and the two measures of arm advantage. Our main finding was that infants with a right-sided head preference had a consistently shorter onset latency for the right arm. We interpret this association as stemming from a common labyrinthine asymmetry that involves different vestibulospinal pathways for the neck and arm muscles. In general, our findings are discussed in the context of Previc's (1991) left-otolithic dominance hypothesis and Grattan, De Vos, Levy, and McClintock's (1992) model of newborn functional asymmetries.

  • 78.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Effects of prematurity on brain maturation and movement performance in 7-9-year-old children2012Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 54, s. 13-14Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVE: To investigate the associations between brain volumes and spatiotemporal properties of goal-directed upper-limb movements in relation to perinatal factors in preterm born children. BACKGROUND: Recent follow-up studies of children born prematurely have generally found worse sensory-motor performance at school age in comparison to term born children. Additionally, a higher incidence of non-right handedness has been described in preterm born children. Yet, our knowledge is still limited in how a preterm birth may affect brain maturation and how this is associated with later performance and motor functioning. DESIGN/METHODS: In the first phase of this on-going, longitudinal study, motor functions have been investigated in 7-9-years-old children born prematurely without early sign of neuropathology (N= 32, Mean GW=32) in comparison to age matched fullterm born children (N=38). Kinematic registrations during task specific upper-limb movements as well as side differences were assessed. Additionally, functional brain structures/volumes were investigated by 3-Tesla (T) magnetic resonance imaging (MRI). RESULTS: Preliminary outcomes indicating subtle, but still poorer upper-limb performance generated from the kinematic outcome parameters and with less clear side preferences in the preterm-born children. Decreased total brain volume and regional gray matter reduction were associated with more segmented movement trajectories and with gestational age and birth weight.These results suggest that neuromotor functions are less efficient and less lateralized as an effect of a premature birth. CONCLUSIONS: The findings underscore the need for follow-up programs and more refine neuromotor investigations to improve early identification of developmental delays and therapeutic efforts to optimize motor development in preterm born children.

     

  • 79.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Kinematic analysis of sequential goal-directed movements in at-risk, preterm born children2014Inngår i: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 39, nr Suppl 1, s. 22-Artikkel i tidsskrift (Annet vitenskapelig)
  • 80.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Kinematic analysis of sequential goal-directed movements in at-risk, preterm born children2013Inngår i: 22nd Annual Meeting of European Society for Movement Analysis in Adult and Children (ESMAC), Glasgow, Scotland, 2013, s. 53-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    INTRODUCTION and AIM: The aim of this study was to conduct kinematic analyses of sequential upper-limb movements in order to isolate different kinematic parameters that might explain the sensory-motor-functional deficits and delays commonly observed in children born preterm (PT). Quantitative analyses of reaching movements in PT infants [1] have revealed some promising results in characterizing the influence of a premature birth on movement control. Also, recent findings from studies using kinematic measurements on children with mild and moderate hemiplegic cerebral palsy [2, 3] show that kinematic measurements are valuable for making distinctions between even minor movement coordination problems and for identification of sensory-motor impairments. Nevertheless, there is still limited knowledge of how a preterm birth may effect long-term neuromotor development and few have investigated such effects by means of kinematics.

     PATIENTS/MATERIALS and METHODS: This kinematic study is part of a more comprehensive, longitudinal project with the goal of exploring the relationship between brain development/deviation and sensory-motor performance in children born PT. Participants consist of 148 children aged between 4–8 years; sixty-eight PT (<35 weeks’ gestation age (GA), range, 22-35, M = 31.7, SD = 3.4; 30 girls) with no diagnosed impairments, and eighty age matched children born full-term (FT) without medical problems (M age at testing = 6.7, SD = 1.8; 36 girls). The children performed goal-directed unimanual upper-limb task with respective hand, where small beads were picked by use of pincer-grip and threaded onto a rod sequentially. The children were informed to pick and thread as many beads as possible, one bead at the time, during a pre-set recording time of 30 seconds. The upper-limb movements were recorded by a six camera optoelectronic system (ProReflex, Qualisys Inc., Gothenburg, Sweden). The 3D data (extracted from head-, shoulder-, elbow- and wrist-markers) were further analysed by use of customized MATLAB scripts. To analyse possible effect of GA the PT children were divided into two sub-groups: moderately preterm (M-PT) = GA 33-35, n = 35 and very preterm (V-PT) = GA <32+6, n = 30.

     RESULTS: The kinematic outcomes analysed by MANOVAs, with side (preferred/ non-preferred) and group (FT, M-PT and V-PT) as categorical predictors, indicating significant group differences in most of the kinematic parameters investigated (e.g., movement duration, 3D distance and segmentation). Differences were mainly evident in the group classified as V-PT compared with M-PT and FT children. Significant correlations between children’s testing age and their kinematic outcomes were also shown within all groups (FT, M-PT and V-PT). These relations were characterized by decreased movement duration, 3D distance and movement segmentation with age.

     DISCUSSION and CONCLUSIONS: Investigating kinematic outcome parameters of upper-limb goal-directed movements confirms that a PT birth, especially a very PT birth, seems to have a long-term effect on children’s motor functions. In the present study, this was shown by means of less proficient spatiotemporal organization during sequentially performed goal-directed movements in the children born PT in comparison to the FT children. In conclusion, the kinematic movement registrations/analysis offers a reliable, non-invasive method to detect even subtle neuromotor developmental delay and/or abnormality. Thus, the method provides a unique possibility to investigate a number of crucial issues in relation to cerebral abnormalities and sensory-motor development in at-risk children.

    REFERENCES

    [1] Fallang, B., Saugstad, O. D., Grogaard, J., & Hadders-Algra, M. (2003). Kinematic quality of reaching movements in preterm infants. Pediatric Research, 53, 836-842.

    [2] Domellöf, E., Rösblad, B., & Rönnqvist, L. (2009). Impairment severity selectively affects the control of proximal and distal components of reaching movements in children with hemiplegic cerebral palsy. Developmental Medicine & Child Neurology, 51, 807-816.

    [3] Rönnqvist, L., & Rösblad, B. (2007). Kinematic analysis on unimanual reaching and grasping movements in children with hemiplegic cerebral palsy. Clinical Biomechanics, 22, 165-175.

  • 81.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Neuromotor and cognitive functions in 4-9-years-old children born prematurely2011Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 53, nr Suppl. s3, s. 33-34Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVE: To identifying developmental differences in neurologically based functioning in preterm born children compared with typically developing, fullterm born children. BACKGROUND: Resent follow-up studies of children born prematurely, even in those without identified neuropathology, have consistently found poorer neuromotor and cognitive skills at school age; thus, at least from group level comparisons. Still, our knowledge is limited in how a preterm birth may effects later behavioural outcomes. DESIGN/METHODS: In the first phase of this ongoing, cross-sectional and quasi-longitudinal study, motor functions, laterality and cognitive functions have been investigated in 4-9-years-old children born prematurely (N= 70, Mean GW=31), and in comparison to age matched fullterm born children (N=78). Additionally, brain imaging (MRI) data was collected on both fullterm and preterm born children at the age of 7-9-years. Kinematic movement registrations and additional behaviour measurements in combination with high resolution, structural 3Tesla MRI scans was used to investigate a number of expected crucial issues and associations between neuromotor, cognitive and structural organisations in both the preterm and the full term born children. RESULTS: Preliminary outcomes indicating subtitle, but still overall differences in most of the kinematic parameters analysed from arm, hand, and head movements (e.g., movement durations, smoothes, segmentation, velocity profile), and with less lateralized sensory-motor performance in the preterm born children at the age of 4- and 7-9-years in comparison to fullterm born children. In addition, the kinematic outcomes were associated with the cognitive performance in the preterm born children. These results are suggesting that both neuromotor and cognitive functions are less efficient in preterm born children. These behavioural outcomes will further be investigated in relation to the outcomes from the MRI investigations. CONCLUSIONS: The outcome from the first analysis underscores the need for further refine investigations and follow-ups, even on an individual level, for the majority of preterm born children.

  • 82.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    The association between movement organization and cognitive performance in 4-9-years-old children born prematurely2011Inngår i: Proceedings for the Motor Control and Human Skills Conference, Curtin University , 2011, s. 60-Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    OBJECTIVE: To investigate neurological based functioning in preterm born children in comparison with fullterm born children.

    BACKGROUND: Resent follow-up studies of children born prematurely have generally found worse perceptual and cognitive performance at school age in comparison to those fullterm born. Yet, our knowledge is limited in how a preterm birth may effects later movement organization and quality and its relation to cognitive skills.

    DESIGN/METHODS: In the first phase of this ongoing, cross-sectional and quasi-longitudinal study, sensory-motor functions have been investigated in 4-9-years-old children born prematurely without any early sign of neuropathology (N= 70, Mean GW=31) and in comparison to age matched fullterm born children (N=78). Kinematic registrations (by ProReflex) during task specific upper-limb movements as well as cognitive functions (by Wechsler Intelligence Scale for Children, 4th edition) were assessed. Additionally, brain imaging (MRI) data was collected on both preterm and fullterm born children at the age of seven. RESULTS: Preliminary outcomes indicating subtitle, but still overall poorer motor performance generated from the analyses of the kinematic outcome parameters from the upper limbs, and with less clear side preferences, in the preterm born children at the age of 4- and 7-9-years in comparison to fullterm born children. In addition, the kinematic outcomes were associated with poorer cognitive performance in the preterm born children. These results are suggesting that both neuromotor and cognitive functions are less efficient as an effect of a premature birth. The behavioural outcomes are further investigated and associated to the outcomes from the MRI investigations.

    CONCLUSIONS: The findings from the first analysis underscores the need for follow-up programs and more refine neuromotor investigations; thus, even in preterm born children without any early sign of or identified neuropathology.

  • 83.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Lenfeldt, Niklas
    Umeå universitet, Medicinska fakulteten, Institutionen för farmakologi och klinisk neurovetenskap, Klinisk neurovetenskap.
    Johansson, Anna-Maria
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi.
    Warntjes, Marcel J. B.
    Department Centre for Medical Image Science and Visualization, Linköping University.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Assessment of myelin and brain volumes at early school-age: long-term effects of a preterm birth2018Inngår i: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 60, nr S2, s. 20-20Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Introduction: Structural and functional alterations in white matter architecture are common described in children born preterm (PT) and associated to behavioral implications. Still, how critical gestational immaturity may associate with later myelination is less studied. This study aimed to explore the influence and associations between gestational age (GA) and birthweight (BW) in children born PT compared with fullterm (FT), on quantitative values of brain myelin and volumes.

    Patients and methods: Participants included 60 children (mean age = 8.2 years) categorized based on GA (weeks); ranging from 25 - 35.4 in PTs (N=27); 38 - 41.9 in FTs (N=33). Volumetric brain measures were conducted by a 3.0-Tesla MRI-scanner and synthetic MRI (SyMRI) acquisition sequence, including synthesis of contrast weighted images. Automatic segmentation of total brain tissues (intracranial [ICV] and parenchymal [BPV] volume [ml]) generated gray-matter (GM), white-matter (WM), cerebrospinal fluid (CSF), and total myelin volume.

    Result: Children born extremely PT (<27GW) displayed reductions of total BPV and WM compared to FTs, less myelinated content than very PT (VPT; < 32GW) and moderately PT (MPT; <36GW), and significant more CSF than FT-born. Significant positive correlation between respectively increasing GA (r= .48) and BW (r= .53) and amount of myelinated content were found for the PT-born.

    Conclusion: Detection of diversity regarding myelination and brain-volumes and associations to risk factors related to gestational immaturity may be useful for increased understanding of long-term effects of degree of prematurity and allowing future investigations of how interventions effects brain myelination (and plasticity) in children born PT.

  • 84.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    McDonald, Rachel
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Sommer, Marius
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Influences of Synchronized Metronome Training on Soccer Players’ Timing Ability, Performance Accuracy, and Lower-Limb Kinematics2018Inngår i: Frontiers in Psychology, E-ISSN 1664-1078, Vol. 9, s. 1-16, artikkel-id 2469Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Planning and performance of all complex movement requires timing, integration, and coordination between sensory-perception and motor production to be successful. Despite this, there is limited research into “if” and “how” timing training may influence movement performance in athletes. The aim of the present study was to investigate the effect of synchronized metronome training (SMT) on sensorimotor timing ability, and in view of that, if improved timing may be transferred to lower-limb movement planning, precision performance, and kinematics. The sample consisted of 24 female elite- and semi-elite soccer players, randomly assigned to receive SMT and a control group. The SMT group received 12 sessions of Interactive Metronome® (IM) training over 4 weeks. At pre- and post-test, timing-precision was assessed through hand and feet movement synchronization with rhythmic sound; and leg-movements performance accuracy, duration, and kinematics were recorded during embodied high cognitive-load stepping task (6 trials×20 s) by use of a optoelectronic motion capture system. Pre- to post-test comparisons showed significant timing improvements as an effect of the IM training. Significant pre- to post-test improvements on the stepping task performance were seen in an increasing number of accurate foot taps during the stepping task sequence and by shorter duration for the SMT-group only. No evident pre- to post-test effects of SMT on the kinematic parameters investigated were found. These findings signify that the guided attention and working-memory functioning may be positively affected by SMT training; thereby, resulting in better motor planning, performance, and movement precision. Still, independent of group and test-occasion, significant correlations were found between the participants’ outcome performance differences and the kinematic parameters. It was found that a decreasing 3D movement distance and less segmented movements correlating negatively, and increasing velocity (speed) positively, with accuracy and performance duration, respectively. These findings are likely associated with inter-individual variations in the nature of higher-order cognitive processing capacity due to the highly cognitive demanding stepping task.

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  • 85.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rösblad, Birgit
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering. Sjukgymnasters Riksförbund.
    Barnets rörelseutveckling2013Inngår i: Fysioterapi för barn och ungdomar: teori och tillämpning / [ed] Eva Beckung, Eva Brogren, Birgit Rösblad, Lund: Studentlitteratur, 2013, 2:1, s. 21-42Kapittel i bok, del av antologi (Fagfellevurdert)
  • 86.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rösblad, Birgit
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Kinematic analysis of unimanual reaching and grasping movements in children with hemiplegic cerebral palsy2007Inngår i: CLIN BIOMECH, ISSN 0268-0033, Vol. 22, nr 2, s. 165-175Artikkel i tidsskrift (Fagfellevurdert)
  • 87.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    von Hofsten, Claes
    Neonatal finger and arm movements as determined by a social and an object context1994Inngår i: Infant and Child Development, ISSN 1522-7227, E-ISSN 1522-7219, Vol. 3, nr 2, s. 81-94Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    What kind of hand and finger movements are newborn infants preoccupied with, and how are these movements organized and controlled? These questions were studied in two experiments under three conditions: a social condition, in which the mother (in expt 1) or the experimenter (in expt 2) sat face to face with the infant; an object condition, in which a ball moving slowly and irregularly was presented to the infant; and a baseline condition (in expt 1) without ball or mother present. The size of the ball and the distance to it was chosen so that it approximately corresponded to the visual angle of the head of the model. Twenty-six neonates participated in the study ranging from 2 to 6 days of age at the time of observation. All infants were in an alert, optimal awake state during the experiments. The infants' finger movements were scored from video recordings. The result revealed a large variety of relatively independent finger movements. It was found that finger movements differed both in quantity and quality between the three conditions. There were many more finger movements in the social condition than in the object and baseline conditions. In addition, there were relatively more transitional finger movements and flexions of the hand in the social condition, and relatively more thumb-index finger activity and extensions of the hand in the object condition. Finally, the arms were more often forward extended in the object condition than in the social condition. The results support the notion that neonates show different modes of functioning towards people and objects.

  • 88.
    Sandlund, Marlene
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Grip, Helena
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Effect of practice with motion interactive video games on goal-directed arm movements in children with cerebral palsy: a kinematic evaluationManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    Objective: The aim of the present study was to evaluate the quality of goal-directed arm movements in children with cerebral palsy after four weeks of daily practice with motion interactive games, and to explore and compare the applicability of various kinematic parameters in a virtual context compared to a situation with real objects.

    Methods: Fifteen children with CP, 6-16 years, practiced with the EyeToyâ for PlayStation2â in their homes during four weeks. Before and after the intervention kinematics and kinetics were captured with a five camera motion analysis system (Proreflex, Qualisys AB, Gothenburg, Sweden) and a force plate. The children performed arm movements towards both virtual and real targets.

    Results: The children used a more economic reaching strategy with shorter Centre of pressure paths, improved Movement precision, and reduced variability in Maximal shoulder angles during play after practice. Transfer of improved motor control to goal-directed arm movements towards real targets was also indicated by increased Movement smoothness, and while reaching with the non-dominant side, reduced Centre of pressure paths path. The spatiotemporal characteristics proved complex to interpret in terms of improved motor control.

    Conclusions: When taking the constraints of the tasks into account the relevant kinematic parameters explored support the conclusion that practice with motion interactive games resulted in an improved motor control. The results of this study illuminate the importance of considering both the nature of the task and the context in which movements are performed when selecting and interpreting kinematic parameters.

  • 89.
    Sandlund, Marlene
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Grip, Helena
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Häger, Charlotte K.
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Fysioterapi.
    Training of goal directed arm movements with motion interactive video games in children with cerebral palsy: a kinematic evaluation2014Inngår i: Developmental Neurorehabilitation, ISSN 1751-8423, E-ISSN 1751-8431, Vol. 17, nr 5, s. 318-326Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Objective: The main aim of this study was to evaluate the quality of goal-directed arm movements in 15 children with cerebral palsy (CP) following four weeks of home-based training with motion interactive video games. A further aim was to investigate the applicability and characteristics of kinematic parameters in a virtual context in comparison to a physical context.

    Method: Kinematics and kinetics were captured while the children performed arm movements directed towards both virtual and physical targets.

    Results: The children’s movement precision improved, their centre of pressure paths decreased, as did the variability in maximal shoulder angles when reaching for virtual objects. Transfer to a situation with physical targets was mainly indicated by increased movement smoothness.

    Conclusion: Training with motion interactive games seems to improve arm motor control in children with CP. The results highlight the importance of considering both the context and the task itself when investigating kinematic parameters.

  • 90.
    Sandlund, Marlene
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Grip, Helena
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering, Sjukgymnastik.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Low-cost motion interactive video games in home training for children with cerebral palsy: A kinematic evaluation2011Inngår i: 2011 International Conference on Virtual Rehabilitation, ICVR / [ed] Daniel Thalmann, IEEE conference proceedings, 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    3D motion analysis was applied to assess goal-directed arm movements in 15 children with cerebral palsy (CP) before and after four weeks of home training with low-cost motion interactive video games. The results indicated that the children improved movement precision when playing the virtual games, improved movement smoothness when reaching for real targets, and reduced the involvement of the trunk especially when reaching with the non-dominant side. © 2011 IEEE.

  • 91.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering.
    Boraxbekk, Carl-Johan
    Umeå universitet, Samhällsvetenskapliga fakulteten, Enheten för demografi och åldrandeforskning (CEDAR). Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI). Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Hvidovre, Denmark.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Timing Training in Female Soccer Players: Effects on Skilled Movement Performance and Brain Responses2018Inngår i: Frontiers in Human Neuroscience, E-ISSN 1662-5161, Vol. 12, artikkel-id 311Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Although trainers and athletes consider “good timing skills” critical for optimal sport performance, little is known in regard to how sport-specific skills may benefit from timing training. Accordingly, this study investigated the effects of timing training on soccer skill performance and the associated changes in functional brain response in elite- and sub-elite female soccer players. Twenty-five players (mean age 19.5 years; active in the highest or second highest divisions in Sweden), were randomly assigned to either an experimental- or a control group. The experimental group (n = 12) was subjected to a 4-week program (12 sessions) of synchronized metronome training (SMT). We evaluated effects on accuracy and variability in a soccer cross-pass task. The associated brain response was captured by functional magnetic resonance imaging (fMRI) while watching videos with soccer-specific actions. SMT improved soccer cross-pass performance, with a significant increase in outcome accuracy, combined with a decrease in outcome variability. SMT further induced changes in the underlying brain response associated with observing a highly familiar soccer-specific action, denoted as decreased activation in the cerebellum post SMT. Finally, decreased cerebellar activation was associated with improved cross-pass performance and sensorimotor synchronization. These findings suggest a more efficient neural recruitment during action observation after SMT. To our knowledge, this is the first controlled study providing behavioral and neurophysiological evidence that timing training may positively influence soccer-skill, while strengthening the action-perception coupling via enhanced sensorimotor synchronization abilities, and thus influencing the underlying brain responses.

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  • 92.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering.
    Olsson, Carl Johan
    Umeå universitet, Samhällsvetenskapliga fakulteten, Centrum för befolkningsstudier (CBS).
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Timing training in female soccer players: effects on motor skill and associated changes in functional brain activityManuskript (preprint) (Annet vitenskapelig)
  • 93.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Häger, Charlotte
    Umeå universitet, Medicinska fakulteten, Institutionen för samhällsmedicin och rehabilitering.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Synchronized metronome training induces changes in the kinematic properties of the golf swing2014Inngår i: Sports Biomechanics, ISSN 1476-3141, E-ISSN 1752-6116, Vol. 13, nr 1, s. 1-16Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose of this study was to evaluate possible effects of synchronized metronome training (SMT) on movement dynamics during golf swing performance, as captured by kinematic analysis. A one-group, between-test design was applied on thirteen male golfers (27.5 ± 4.6 years old, 12.7 ± 4.9 golf handicap) who completed twelve sessions of SMT over a four week period. Pre- and post-assessments of golf swings made with three different clubs (4-iron, 7-ironand pitching wedge) were performed using a three-dimensional motion capture system. Club peak velocity at three different swing phases andcross-correlation analysis of time-series signals were made on joint couplings(wrist-elbow-shoulder) of both arms, and between joints and the club, during the full golf swing. There were significantly higher cross-correlations between joint-couplings and concomitant changes of the associated phase-shift differences, as well as reduced phase-shift variability at post-test. No significant effect of SMT was found for the club peak velocities. We suggest that domain-general influences of SMT on the underlying brain-based motorcontrol strategies lead to a more coordinated movement pattern of the golf swing performance, which may explain previous observations of significantly improved golf shot accuracy and decreased variability after SMT.

  • 94.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Bättre golfprestation med timingträning2011Inngår i: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, nr 1, s. 54-58Artikkel i tidsskrift (Fagfellevurdert)
  • 95.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Effekten av synkroniserad metronomträning på sportprestation2009Inngår i: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN ISSN 1103-4629, nr 31, s. 31-32Artikkel, forskningsoversikt (Fagfellevurdert)
  • 96.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Improved motor-timing: effects of synchronized metronome training on golfshot accuracy2009Inngår i: Journal of Sports Sciences & Medicine. Free electronic journal, ISSN ISSN 1303-2968, Vol. 8, nr 4, s. 648-656Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study investigates the effect of synchronized metronome training (SMT) on motor timing and how this training might affect golf shot accuracy. Twenty-six experienced male golfers participated (mean age 27 years; mean golf handicap 12.6) in this study. Pre- and post-test investigations of golf shots made by three different clubs were conducted by use of a golf simulator. The golfers were randomized into two groups: a SMT group and a Control group. After the pre-test, the golfers in the SMT group completed a 4-week SMT program designed to improve their motor timing, the golfers in the Control group were merely training their golf-swings during the same time period. No differences between the two groups were found from the pre-test outcomes, either for motor timing scores or for golf shot accuracy.

    However, the post-test results after the 4-weeks SMT showed evident motor timing improvements. Additionally, significant improvements for golf shot accuracy were found for the SMT group and with less variability in their performance. No such improvements were found for the golfers in the Control group. As with previous studies that used a SMT program, this study’s results provide further evidence that motor timing can be improved by SMT and that such timing improvement also improves golf accuracy.

  • 97.
    Sommer, Marius
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    The influence of training with the non-dominant foot on female soccer players’skill performance2014Inngår i: Word Conference on Science and Soccer 4.0.  WCSS Abstract Book, Portland, Oregon, USA., 2014, s. 36-36Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Introduction Modulation of lateral preference is suggested to be of importance for sports in which bilateral proficiency is advantageous for high performance. Evidence for such modulations in athlete’s laterality comes from soccer players, suggested as an effect of pronounced bilateral practice (1, 2). Thus, in line with evidence showing that lateralized practice may lead to a shift of manual dominance; our purpose of the present study was to investigate if extensive soccer-specific practice with the Non-dominant-foot (NdF) may positively affect soccer skill performance by means of accuracy and consistency.

    Methods Twenty-four elite and sub-elite players (age: 20.5 yrs) from outfield playing positions were randomized to a control- and NdF training-group. The NdF group trained specifically with their NdF on a variety of basic soccer skills (e.g. passing, trapping, juggling) during regular soccer practice, over a four week period (three sessions of 20 min a week). The controls continued their regular team practice. The first skill-test assessed the number of goals scored with the NdF, in a “turn and shoot” task, on a 1.0 x 2.44 meter target, 15 m away. The second task comprised a 25 m cross-pass on a ball in movement, in which accuracy and variability of the pass outcome was assessed.

    Results & Discussion Whereas the NdF group displayed a significant improvement in number of goals scored (1.8 +/- 0.5 goals) from pre- to post-test, the control group did not (-0.9 +/- 1.1 goals). For the cross-pass task the NpF group displayed a significant pre- to post-test improvement of the mean accuracy score by 1.6 +/- 0.5 meter, with concomitant reduced variability. No such effects were evident for the control group (0.2+/- 0.7 meters).

    Conclusion From an applied perspective, more frequent training with the NdF, in a fashion that does not require special equipment or distinct tutoring, seems to improve skilled use of the non-dominant foot, thus, that may lead to higher proficiency for players even on the elite-/and sub-elite level.

    References

    1. Teixeira, L. A., & Okazaki, V. H. A. (2007). Exp, Brain Res, 183, 417–423.

    2. Teixeira, L. A. et al (2011). Res. Q. Exerc. Sport, 82, 21–27

  • 98.
    von Hofsten, Claes
    et al.
    ¨Psykologiska institutionen, Uppsala universitet.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Preparation for grasping an object: A developmental study.1988Inngår i: Journal of Experimental Psychology: Human Perception and Performance, ISSN 0096-1523, E-ISSN 1939-1277, Vol. 14, nr 4, s. 610-621Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An optoelectronic technique (SELSPOT) was used to monitor the opening and closing of the hand during reaching actions by measuring the change in the distance between thumb and index finger. Exp 1 established an adult criterion for the development. Adults started closing the hand around the target well before touch, and the timing was dependent on the size of the target. The hand started to close earlier when grasping a small rather than a large target. In addition, the degree of hand opening was also less for a small than for a large target. In Exp 2, infants who were 5–6, 9, and 13 months of age also controlled their grasping actions visually and started closing the hand around the target in anticipation of the encounter rather than as a reaction to the encounter. The strategy of the two younger age groups was different from that of adults. They started closing the hand closer to the time of contact with the target than did the 13-month-olds, who were comparable to adults in this respect. In all age groups, reaching and grasping were most commonly organized in a continuous way; the hand started to close without any interruption in the approach. The opening of the hand was adjusted to target size in the 9- and 13-month-olds but not in the 5–6 month olds.

  • 99.
    von Hofsten, Claes
    et al.
    Institutionen för psykologi, Uppsala universitet.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    The structuring of neonatal arm movements1993Inngår i: Child Development, ISSN 0009-3920, E-ISSN 1467-8624, Vol. 64, nr 4, s. 1046-1057Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The organization and structuring of spontaneous arm movements of 8 neonates were studied quantitatively. The movements were divided up into units, each consisting of 1 acceleration and 1 deceleration phase. This analysis showed that the movements had a distinct temporal structuring. An analysis of curvature was also performed, and it showed that the most distinct changes in movement direction occurred at the transitions between movement units. Finally, the movements of the 2 arms were found to be coupled in all 3 dimensions of space. They had a clear tendency to move together along the body's longitudinal axis, abduct and adduct together, and extend together in the forward direction.

  • 100. Walton, Lois
    et al.
    Eriksson Domellöf, Magdalena
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Boraxbekk, Carl-Johan
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper, Diagnostisk radiologi. Umeå universitet, Medicinska fakulteten, Umeå centrum för funktionell hjärnavbildning (UFBI). Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Hvidovre, Denmark; Instituteof Sports Medicine Copenhagen (ISMC), Bispebjerg Hospital, Copenhagen University, Copenhagen, Denmark.
    Domellöf, Erik
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för psykologi.
    Bäckström, David
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.
    Forsgren, Lars
    Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Neurovetenskaper.
    Stigsdotter Neely, Anna
    The Effects of Working Memory Updating Training in Parkinson's Disease: A Feasibility and Single-Subject Study on Cognition, Movement and Functional Brain Response2021Inngår i: Frontiers in Psychology, E-ISSN 1664-1078, Vol. 11, artikkel-id 587925Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In Parkinson's disease (PD), the fronto-striatal network is involved in motor and cognitive symptoms. Working memory (WM) updating training engages this network in healthy populations, as observed by improved cognitive performance and increased striatal BOLD signal. This two-part study aimed to assess the feasibility of WM updating training in PD and measure change in cognition, movement and functional brain response in one individual with PD after WM updating training. A feasibility and single-subject (FL) study were performed in which patients with PD completed computerized WM updating training. The outcome measures were the pre-post changes in criterion and transfer cognitive tests; cognitive complaints; psychological health; movement kinematics; and task-related BOLD signal. Participants in the feasibility study showed improvements on the criterion tests at post-test. FL displayed the largest improvements on the criterion tests and smaller improvements on transfer tests. Furthermore, FL reported improved cognitive performance in everyday life. A shorter onset latency and smoother upper-limb goal-directed movements were measured at post-test, as well as increased activation within the striatum and decreased activation throughout the fronto-parietal WM network. This two-part study demonstrated that WM updating training is feasible to complete for PD patients and that change occurred in FL at post-test in the domains of cognition, movement and functional brain response.

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