| Influence of fear of falling on anticipatory postural control of medio-lateral stability during rapid leg flexion. | |
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MedLine Citation:
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PMID: 20938782 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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During leg flexion from erect posture, postural stability is organized in advance during "anticipatory postural adjustments" (APA). During these APA, inertial forces are generated that propel the centre of gravity (CoG) laterally towards stance leg side. This study examined how fear of falling (FoF) may influence this anticipatory postural control of medio-lateral (ML) stability. Ten young healthy participants performed a series of leg flexions at maximal velocity from low and high surface heights (6 and 66 cm above ground, respectively). In this latter condition with increased FoF, stance foot was placed at the lateral edge of the support surface to induce maximal postural threat. Results showed that the amplitude of ML inertial forces generated during APA decreased with FoF; this decrease was compensated by an increase in APA duration so that the CoG position at time of swing foot-off was located further towards stance leg side. With these changes in ML APA, the CoG was propelled in the same final (unipodal) position above stance foot as in condition with low FoF. These results contrast with those obtained in the literature during quiet standing which showed that FoF did not have any influence on the ML component of postural control. It is proposed that ML APA are modified with increased FoF, in such a way that the risk of a sideway fall induced by the large CoG motion is attenuated. |
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Authors:
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E Yiou; T Deroche; M C Do; T Woodman |
Publication Detail:
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Type: Journal Article Date: 2010-10-12 |
Journal Detail:
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Title: European journal of applied physiology Volume: 111 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 611-20 Citation Subset: IM |
Affiliation:
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Laboratory CIAMS, Team RIME, UFR STAPS, University of Paris-Sud 11, 91405, Orsay Cedex, France, eric.yiou@u-psud.fr. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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