기저면의 크기 변화가 직립 자세제어의 가변성과 복잡성에 미치는 영향

Title
기저면의 크기 변화가 직립 자세제어의 가변성과 복잡성에 미치는 영향
Other Titles
The Effect of Size of Base of Support on Variability and Complexity During Standing
Author(s)
신성훈장대근[장대근]
Keywords
Postural control; Base of support; frequency domain analysis; variability; complexity
Issue Date
201402
Publisher
한국체육과학회
Citation
한국체육과학회지, v.23, no.1, pp.1421 - 1428
Abstract
The aim of the study was to investigate the effect of base of support on standing postural control. In this study, we measured 24 persons’ COP signals from 20 % to 100% base of support. For the variability measures, mean velocity(MV), root mean square(RMS), sway path (SP), 95% ellipse area were measured for each direction and radial movement. For the frequency domain parameters four well-known quantitative parameters were used: the median frequency, 50, 80, and 90 percentile power spectrum density. As nonlinear dynamic measures, approximate entropy(ApEn), sample entropy(SampEn) and detrended fluctuation analysis(DFA) a. The results showed that only variability measures linearly and significantly increased as base of support decreased (p<.001). However, frequency domain parameters and nonlinear measures drastically change only when base of support reduced up to 20%. Results implied that even though base of support reduced, it did not directly change the postural control strategy. There are some thresholds to change the control process. Therefore, we conclude that persons’s postural control system compensate the reduced the base of support. It is effective until 20-40%.
URI
http://hdl.handle.net/YU.REPOSITORY/33093
ISSN
1226-0258
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생활과학대학 > 체육학부 > Articles
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