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정적 서기와 쪼그려 앉았다 서기 동작에서 고령자남녀의 자세 동요 비교Comparison of Postural Sway in the Elderly Males and Females during Quiet Standing and Squat-and-Stand Movement

Other Titles
Comparison of Postural Sway in the Elderly Males and Females during Quiet Standing and Squat-and-Stand Movement
Authors
김지원김다혜문기욱엄광문남정숙김요한홍정화박병규
Issue Date
2008
Publisher
대한전기학회
Keywords
Postural control; COP; Fall-risk; Quiet standing; Squat-and-stand
Citation
전기학회논문지ABCD, v.57, no.11, pp.2131 - 2137
Journal Title
전기학회논문지ABCD
Volume
57
Number
11
Start Page
2131
End Page
2137
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/125211
ISSN
1229-2443
Abstract
In this paper, COP (center of pressure) during quiet standing and squat-and-stand movement was analyzed to compare the postural control of young and elderly subjects with special interest in the elderly females who were reported to have higher fall rate than the elderly males. Subjects include the young subjects (10 males: 21.8±2.6yrs, 10 females: 20.4±0.3yrs) and the elderly subjects (8 males: 75.5±4yrs, 8 females: 72.3±3.5yrs). Analysis parameters were the mean of the distance between the instantaneous COP and the average COP (COP distance) and the mean of the COP movement velocity (COP velocity) in both AP (anterio-posterior) and ML (medio-lateral) directions. During quiet standing, the COP distance in ML direction of elderly females was significantly greater than that of elderly males and the COP velocity of elderly females in both ML and AP direction were significantly greater than those of all the other groups. During squat-and-stand movement, the COP distance of elderly females was not significantly different with that of the elderly males. However, the COP velocity of elderly females was significantly greater than that of all the other groups. The large lateral weight shift (COP distance) of elderly females during quiet standing may explain their greater fall rate. However, this does not apply to squat-and-stand movement. In contrast, COP velocity results show that the elderly females' COP is rapidly trembling compared to that of elderly males during both quiet standing and squat-and-stand movement. This results suggest that rapid trembling or postural sway may reflect the reduced postural control ability and the risk of falling.
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