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Postural control among individuals with and without chronic obstructive pulmonary disease: a cross-sectional study of motor and sensory systems
Division of Health, Medicine and Rehabilitation, Department of Health, Education and Technology, Luleå University of Technology, Luleå, Sweden.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.ORCID iD: 0000-0002-3292-7471
Division of Health, Medicine and Rehabilitation, Department of Health, Education and Technology, Luleå University of Technology, Luleå, Sweden.
Division of Health, Medicine and Rehabilitation, Department of Health, Education and Technology, Luleå University of Technology, Luleå, Sweden.
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2023 (English)In: PLOS ONE, E-ISSN 1932-6203, Vol. 18, no 4, article id e0284800Article in journal (Refereed) Published
Abstract [en]

Background: Chronic obstructive pulmonary disease (COPD) is considered a heterogenic syndrome with systemic effects, including muscle dysfunction. There is evidence of postural control impairments among individuals with COPD, partly related to muscle weakness. However, research is scarce regarding the other underlying systems of postural control, such as the visual, somatosensory and vestibular system. The aim was to compare postural control, as well as the motor and sensory systems, between individuals with and without COPD. Methods: Twenty-two participants with COPD (mean age 74.0 ±6.2 years) and 34 non-obstructive references (mean age 74.9 ±4.9 years) participated in this cross-sectional study. Postural control was assessed with center of pressure trajectory of postural sway in quiet as well as a limits of stability test, calculating mediolateral and anteroposterior amplitudes for each test. Assessment of function in the motor system included maximum hand grip strength, as well as maximum strength in muscles around the hip, knee and ankle joints. Visual acuity, pressure sensibility, proprioception, vestibular screening, and reaction time were also included. Data was compared between groups, and significant differences in postural control were further analyzed with an orthogonal projection of latent structures regression model. Results: There was a significantly increased sway amplitude in the mediolateral direction in quiet stance on soft surface with eyes open (p = 0.014) as well as a smaller anteroposterior amplitude in the limits of stability test (p = 0.019) in the COPD group. Regression models revealed that the mediolateral amplitude was related to visual acuity and the burden of tobacco smoking assessed as pack-years. Further, muscle strength associated with anteroposterior amplitude in limits of stability test in the COPD group, and with age and ankle dorsal flexion strength among the referents. Besides for lower ankle plantar flexion strength in the COPD group, there were however no significant differences in muscle strength. Conclusions: Individuals with COPD had a decreased postural control and several factors were associated with the impairments. The findings imply that the burden of tobacco smoking and reduced visual acuity relate to increased postural sway in quiet stance, and that muscle weakness is related to decreased limits of stability, among individuals with COPD.

Place, publisher, year, edition, pages
Public Library of Science , 2023. Vol. 18, no 4, article id e0284800
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-208219DOI: 10.1371/journal.pone.0284800ISI: 000984483800013PubMedID: 37098038Scopus ID: 2-s2.0-85153900736OAI: oai:DiVA.org:umu-208219DiVA, id: diva2:1756571
Funder
Swedish Research Council, K2015-99X-22756-01-4Promobilia foundation, 17030The Swedish Heart and Lung Association, E 139/16Norrbotten County Council, NLL-762571Available from: 2023-05-12 Created: 2023-05-12 Last updated: 2025-02-11Bibliographically approved

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Lindberg, AnneStridsman, CarolineBackman, Helena

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