Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke

Marigold, Daniel S., Eng, Janice J., Tokuno, Craig D. and Donnelly, Catherine A. (2004) Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke. Neurorehabilitation and Neural Repair, 18 4: 222-229. doi:10.1177/1545968304271171


Author Marigold, Daniel S.
Eng, Janice J.
Tokuno, Craig D.
Donnelly, Catherine A.
Title Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke
Journal name Neurorehabilitation and Neural Repair   Check publisher's open access policy
ISSN 1545-9683
1552-6844
Publication date 2004-12-01
Sub-type Article (original research)
DOI 10.1177/1545968304271171
Volume 18
Issue 4
Start page 222
End page 229
Total pages 8
Place of publication Thousand Oaks, CA, United States
Publisher Sage
Language eng
Formatted abstract
Objective: To determine the relationship of muscle strength to postural sway in persons with stroke understanding conditions in which vision and ankle proprioception were manipulated.

Methods: Forty persons with stroke and 40 healthy older adult controls were recruited from the community and underwent balance testing consisting of 6 conditions that manipulate vision and somatosensory information while standing. Postural sway was measured during each condition. In addition, lower extremity joint torques and cutaneous sensation from the plantar surface of the foot were assessed.

Results: Postural sway was increased with more challenging standing conditions (i.e., when multiple sensory systems were manipulated) to a greater extent with the group with stroke compared to controls. Muscle strength was only correlated to sway during the most challenging conditions. Furthermore, a greater number of persons with stroke fell during the balance testing compared to controls.

Conclusions: Impairments in re-weighting/integrating afferent information, in addition to muscle weakness, appear to contribute to postural instability and falls in persons with stroke. These findings can be used by clinicians to design effective interventions for improving postural control following stroke.
Keyword Cerebrovascular accident
Muscle strength
Sensory integration
Sway
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Health and Rehabilitation Sciences Publications
 
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