| Frontal plane standing balance with an ambulation aid:Upper limb biomechanics. | |
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MedLine Citation:
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PMID: 21458816 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Despite widespread acceptance of clinical benefits, empirical evidence to evaluate the advantages and limitations of ambulation aids for balance control is limited. The current study investigates the upper limb biomechanical contributions to the control of frontal plane stability while using a 4-wheeled walker in quiet standing. We hypothesized that: (1) upper limb stabilizing moments would be significant, and (2) would increase under conditions of increased stability demand. Factors influencing upper limb moment generation were also examined. Specifically, the contributions of upper limb center-of-pressure (COP(hands)), vertical and horizontal loads applied to the assistive device were assessed. The results support a significant mechanical role for the upper limbs, generating 27.1% and 58.8% of overall stabilizing moments under baseline and challenged stability demand conditions, respectively. The increased moment was achieved primarily through the preferential use of phasic upper limb control, reflected by increased COP(hands) (baseline vs. challenged conditions: 0.29 vs. 0.72cm). Vertical, but not horizontal, was the primary force direction contributing to stabilizing moments in quiet standing. The key finding that the upper limbs play an important role in effecting frontal plane balance control has important implications for ambulation aid users (e.g., elderly, stroke, and traumatic brain injury). |
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Authors:
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James Y Tung; William H Gage; Karl F Zabjek; Brian E Maki; William E McIlroy |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-31 |
Journal Detail:
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Title: Journal of biomechanics Volume: - ISSN: 1873-2380 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-4-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Graduate Department of Rehabilitation Science, University of Toronto, Toronto, Canada; Department of Kinesiology, University of Waterloo, Waterloo, Canada; Toronto Rehabilitation Institute, Toronto, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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