Document Detail

Contribution of muscle strength and integration of afferent input to postural instability in persons with stroke.
MedLine Citation:
PMID:  15537993     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the relationship of muscle strength to postural sway in persons with stroke under standing 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.
Daniel S Marigold; Janice J Eng; Craig D Tokuno; Catherine A Donnelly
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neurorehabilitation and neural repair     Volume:  18     ISSN:  1545-9683     ISO Abbreviation:  Neurorehabil Neural Repair     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2004-11-11     Completed Date:  2005-02-25     Revised Date:  2013-06-09    
Medline Journal Info:
Nlm Unique ID:  100892086     Medline TA:  Neurorehabil Neural Repair     Country:  United States    
Other Details:
Languages:  eng     Pagination:  222-9     Citation Subset:  IM    
Graduate Program in Neuroscience, University of British Columbia, and Rehab Research Lab, G.F. Strong Rehab Centre, Vancouver, BC, Canada.
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MeSH Terms
Middle Aged
Motor Neurons / physiology
Muscle Contraction / physiology*
Muscle, Skeletal / innervation*,  physiology
Neurons, Afferent / physiology*
Paresis / physiopathology
Postural Balance / physiology
Posture / physiology*
Proprioception / physiology
Stroke / physiopathology*
Grant Support
63617//Canadian Institutes of Health Research

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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