| Influence of an unexpected perturbation on adaptive gait behavior. | |
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MedLine Citation:
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PMID: 21764314 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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During locomotion over uneven terrain, gait must be adapted to avoid a trip. In the event of a foot-obstacle contact, the body reactively responds to the perturbation. However, it is unknown if any proactive adjustments are made in subsequent strides to reduce the likelihood of another contact, and how long any proactive adaptations persist. This study examined gait behavior while stepping over a 10cm obstacle placed in the middle of an 8m walkway. The four obstacle crossings that preceded a spontaneous obstacle contact were compared to the eight obstacle crossings subsequent to the contact. Foot position before the obstacle was not modified following the obstacle contact. However, toe clearance and peak toe elevation increased in the limb that was tripped; the unperturbed limb showed no differences. These findings demonstrate that the sensory information of the perturbed limb proactively influenced the ipsilateral but not the contralateral limb, supporting the idea that the lead and trail limb are controlled independently during obstacle crossing. The proactive adaptation lasted for at least eight trials, suggesting that an unexpected perturbation influences the control of adafptive gait well after obstacle contact. |
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Authors:
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Christopher K Rhea; Shirley Rietdyk |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-7-15 |
Journal Detail:
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Title: Gait & posture Volume: - ISSN: 1879-2219 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-7-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9416830 Medline TA: Gait Posture Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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