NDLI: Application of cross time-frequency analysis to postural sway behavior: the effects of aging and visual systems

Content Provider	IEEE Xplore Digital Library
Author	Shin, Y.-J. Gobert, D. Seung-Hoon Sung Powers, E.J. Jin Bae Park
Copyright Year	1964
Abstract	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.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	10
File Size	1243649
Starting Page	859
Ending Page	868
File Format	PDF
ISSN	00189294
Volume Number	52
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time frequency analysis Aging Transient analysis Feedback control Signal analysis Senior citizens Information analysis Accidents Injuries Costs visual sensory system cross time-frequency distribution feedback control phase difference spectrum postural sway time-frequency analysis
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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