Document Detail


Visual control of human stance on a narrow and soft support surface.
MedLine Citation:
PMID:  8280726     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The influence of additional visual feedback (VF) on stance control was studied under conditions of changed afferent information from the foot sole and ankle joint due to different support surfaces. The changes of body sway amplitudes were analyzed and their frequency spectrum was established. The effect of visual feedback on the amplitude and frequency characteristics of human stance was manifested as: a) a decrease of the mean amplitude of body sway during visual feedback, corresponding to the decrease of power spectrum density (PSD) of stabilograms in the frequency range below 0.05 Hz, b) an increase of mean velocity of body sway corresponding to the increase of PSD of stabilograms in the frequency range of 0.4-1.5 Hz. The results showed that the improvement of the upright stance by additional visual feedback is mainly mediated through activation of postural muscles at the ankle level, or ankle strategy. The stabilization effect of VF on stance control is slight or negligible if the performance part in ankle joint (narrow support) was reduced.
Authors:
M Krizková; F Hlavacka; P Gatev
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Physiological research / Academia Scientiarum Bohemoslovaca     Volume:  42     ISSN:  0862-8408     ISO Abbreviation:  Physiol Res     Publication Date:  1993  
Date Detail:
Created Date:  1994-02-17     Completed Date:  1994-02-17     Revised Date:  2008-04-02    
Medline Journal Info:
Nlm Unique ID:  9112413     Medline TA:  Physiol Res     Country:  CZECH REPUBLIC    
Other Details:
Languages:  eng     Pagination:  267-72     Citation Subset:  IM; S    
Affiliation:
Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, Bratislava.
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MeSH Terms
Descriptor/Qualifier:
Adult
Feedback
Female
Humans
Male
Middle Aged
Posture / physiology*
Visual Perception*

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


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