Document Detail


Control of mediolateral stability during rapid step initiation with preferred and non-preferred leg: is it symmetrical?
MedLine Citation:
PMID:  20444608     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During voluntary stepping initiation, postural stability along the mediolateral direction is controlled via "anticipatory postural adjustment" (APA). This study tested the hypothesis that, in young healthy subjects, the biomechanical features of mediolateral APA depend on the leg that initiates stepping. Subjects (N=10) initiated a rapid single step with the preferred (P condition) and the non-preferred leg (NP condition) on a force-plate. Results showed that mediolateral APA duration (P=0.020) and amplitude were higher (as attested by the increase in maximal center-of-gravity velocity (P=0.003) and displacement (P<0.001) during APA), and that mediolateral stability was better (as attested by the attenuation in center-of-gravity velocity at time of swing-foot contact (P=0.007)) in P than in NP. These results support the view that stepping initiation in healthy subjects involves postural asymmetry. This statement may have relevant implications in clinical evaluation where postural asymmetry is generally considered as reflecting postural impairment.
Authors:
E Yiou; M C Do
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Publication Detail:
Type:  Journal Article     Date:  2010-05-04
Journal Detail:
Title:  Gait & posture     Volume:  32     ISSN:  1879-2219     ISO Abbreviation:  Gait Posture     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-06-23     Completed Date:  2010-11-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  England    
Other Details:
Languages:  eng     Pagination:  145-7     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Affiliation:
Laboratory CIAMS (Complexité, Innovation, Activités Motrices et Sportives), Team RIME (Risque, Intervention, Mouvement, Equilibre), UFR STAPS, University of Paris-sud, 91440 Orsay Cedex, France. e.yiou@libertysurf.fr
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MeSH Terms
Descriptor/Qualifier:
Adult
Female
Functional Laterality / physiology*
Humans
Leg / physiology*
Male
Postural Balance / physiology*
Walking / physiology*

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