umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Arm and hand movements in neonates and young infants
Umeå University, Faculty of Social Sciences, Department of Psychology.
1993 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Umeå University , 1993. , 42 p.
National Category
Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:umu:diva-63364ISBN: 91-7174-839-3 (print)OAI: oai:DiVA.org:umu-63364DiVA: diva2:581832
Public defence
1993-12-04, Department of Psychology, Lecture room Bt 102, Umeå University, Umeå, 10:15
Note

retroaktiv registrering

Available from: 2013-02-06 Created: 2013-01-02 Last updated: 2013-02-06Bibliographically approved
List of papers
1. Preparation for grasping an object: A developmental study.
Open this publication in new window or tab >>Preparation for grasping an object: A developmental study.
1988 (English)In: Journal of Experimental Psychology: Human Perception and Performance, ISSN 0096-1523, E-ISSN 1939-1277, Vol. 14, no 4, 610-621 p.Article in journal (Refereed) Published
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.

National Category
Social Sciences
Research subject
Psychology
Identifiers
urn:nbn:se:umu:diva-63091 (URN)
Available from: 2013-01-01 Created: 2013-01-01 Last updated: 2017-12-06
2. Neonatal finger and arm movements as determined by a social and an object context
Open this publication in new window or tab >>Neonatal finger and arm movements as determined by a social and an object context
1994 (English)In: Infant and Child Development, ISSN 1522-7227, E-ISSN 1522-7219, Vol. 3, no 2, 81-94 p.Article in journal (Refereed) Published
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.

Keyword
Newborns; finger movements; arm movements; social interaction; object interaction
National Category
Social Sciences
Research subject
Psychology
Identifiers
urn:nbn:se:umu:diva-63351 (URN)
Available from: 2013-01-02 Created: 2013-01-02 Last updated: 2017-12-06
3. The structuring of neonatal arm movements
Open this publication in new window or tab >>The structuring of neonatal arm movements
1993 (English)In: Child Development, ISSN 0009-3920, E-ISSN 1467-8624, Vol. 64, no 4, 1046-1057 p.Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
University of Chicago Press: , 1993
National Category
Social Sciences
Research subject
Psychology
Identifiers
urn:nbn:se:umu:diva-63092 (URN)
Available from: 2013-01-01 Created: 2013-01-01 Last updated: 2017-12-06
4. A critical examination of the Moro response in newborn infants--symmetry, state relation, underlying mechanisms
Open this publication in new window or tab >>A critical examination of the Moro response in newborn infants--symmetry, state relation, underlying mechanisms
1995 (English)In: Neuropsychologia, ISSN 0028-3932, E-ISSN 1873-3514, Vol. 33, no 6, 713-726 p.Article in journal (Refereed) Published
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.

Keyword
Moro response, newborn, reflex, vestibular, laterality
National Category
Social Sciences Medical and Health Sciences
Research subject
Psychology
Identifiers
urn:nbn:se:umu:diva-63118 (URN)
Available from: 2013-01-02 Created: 2013-01-02 Last updated: 2017-12-06

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Rönnqvist, Louise
By organisation
Department of Psychology
Psychology

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 328 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf