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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Park, Yang Sun (Department of Physical Education, College of Performing Arts and Sports, Hanyang University) Kwon, Hyun Joon (Department of Kinesiology, School of Public Health, University of Maryland) Koh, Kyung (The Movement Science Center of Research Institute for Sports Science and Sports Industry, Hanyang University) Shim, Jae Kun (Department of Kinesiology, School of Public Health, University of Maryland)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제26권 제2호
발행연도
2016.1
수록면
175 - 181 (7page)

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Objective: The aim of this study was to investigate age-related changes of multi-finger synergy during a constant force production task with and without an additional mechanical constraint. Method: Fourteen elderly subjects (age: $78.50{\pm}4.63yrs$, height: $157.29{\pm}8.97cm$, weight: $65.13{\pm}6.93kg$) and 14 young subjects (age: $21.13{\pm}1.35yrs$, height: $171.57{\pm}8.43cm$, weight: $70.29{\pm}16.77kg$) participated in this study. The subjects were asked to place their index and middle fingers on two force transducers fixed on a small non-moving teeterboard and produce 10 N by pressing the sensors while watching force feedback on a computer screen under the no additional constraint condition (NAC). The subjects also performed the same task with an additional mechanical constraint (AC) where the subjects were asked to balance a teeterboard that could be rotated by finger forces. An uncontrolled manifold approach was used to calculate within-trial and between-trial multi-finger synergy indices, variance in uncontrolled subspace ($V_{UCM}$), and variance in subspace orthogonal to UCM subspace ($V_{ORT}$). Two-way repeated measured ANOVA was performed with the within-factor of task condition (with and without an additional constraint) and the between factor of groups (elderly and young). Results: The elderly group showed significantly increased within-trial $V_{ORT}$ in AC compared with NAC (p < .05) while the young group showed no significant difference between AC and NAC. There was no significant group difference for within-trial $V_{UCM}$. Between-trial $V_{ORT}$ remained unchanged between groups and conditions. However, between-trial $V_{UCM}$ for the elderly group significantly decreased in AC as compared to NAC, along with no significant difference for the young group. For multi-finger synergy, there was no significant group difference of within-trial synergy. However, between-trial synergy for the elderly group significantly decreased in AC as compared to NAC (p < .05). Conclusion: Our results indicate that aging decreased consistency (i.e., ability to perform the task on a moment-to-moment basis) with an additional mechanical constraint. In addition, aging was associated with decreased multi-finger synergy on a trial-to-trial basis.
#Finger #Synergy #Uncontrolled manifold #Aging

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참고문헌 (24)

참고문헌 신청
Ambike, S. / 2016 / Synergies in the space of control variables within the equilibrium-point hypothesis / Neuroscience 315:150~161 google schola Bernstein, N. A. / 1967 / The co-ordination and regulation of movements google schola Enoka, R. M. / 2003 / Mechanisms that contribute to differences in motor performance between young and old adults / Journal of Electromyography and Kinesiology 13(1):1~12 google schola Gelfand, I. M. / 1998 / On the problem of adequate language in motor control / Motor Control 2(4):306~313 google schola Grabiner, M. D. / 1995 / Changes in movement capabilities with aging / Exercise and Sport Sciences Reviews 23(1):65~104 google schola

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