Document Detail


Application of cross time-frequency analysis to postural sway behavior: the effects of aging and visual systems.
MedLine Citation:
PMID:  15887535     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this paper, the effects of visual feedback and aging on postural sway systems and signals are investigated by analyzing the transient phase difference between "input" and "output" which correspond to center of pressure (COP) and center of mass (COM), respectively. In order to analyze the transient phase difference characteristics of COP and COM, a relatively new cross time-frequency analysis technique that provides time- and frequency-localized phase difference information is utilized. The feedback control process in the postural sway is interpreted in terms of a feedback compensator which is characterized in terms of a phase difference. Using the experimental results of the transient phase difference obtained from the cross time-frequency distribution, it is demonstrated that the postural control of young persons are more stable and rely more on visual sensory feedback to stabilize postural control compared to that of the elderly persons.
Authors:
Yong-June Shin; Denise Gobert; Seung-Hoon Sung; Edward J Powers; Jin Bae Park
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  52     ISSN:  0018-9294     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-05-12     Completed Date:  2005-06-07     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  859-68     Citation Subset:  IM    
Affiliation:
Department of Electrical Engineering, The University of South Carolina, Columbia, SC 29208, USA. shinjune@engr.sc.edu
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology
Adult
Aged
Aging / physiology*
Algorithms
Computer Simulation
Diagnosis, Computer-Assisted / methods*
Feedback / physiology
Humans
Models, Neurological*
Motor Activity / physiology
Movement / physiology*
Postural Balance / physiology*
Posture / physiology*
Regression Analysis
Statistics as Topic
Vision, Ocular / physiology*

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


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