Postural Control Adaptability to Floor Oscillation in the Elderly
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概要
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We established a method to evaluate postural control adaptability, applying it to 341 subjects, aged 18-29 years (young subjects) and 50-79 years, in order to investigate the influences of age and gender on adaptability. Subjects stood with eyes closed on a force plate fixed to a floor oscillator, which was sinusoidally oscillated in the anteroposterior direction with 0.5 Hz frequency and 2.5 cm amplitude. Five trials of 1-minute oscillation were conducted, with a short rest between trials. The mean speed of fluctuation of the center of foot pressure (CFP), as detected by the force plate, was calculated as an index of postural steadiness. Mean CFP speed decreased significantly in all age groups with trial repetition. The adaptability capability of elderly subjects was categorized as "good," "moderate," or "poor," as evaluated against a standard value, based on the variation of the regression of mean CFP speed between the 1st and 5th trials in young subjects. Results showed that the magnitude of reduction in the mean speed, with practice, was linearly related to the initial mean speed. We found a general decline in adaptability, and increase in initial mean speed, in subjects aged 60 years and older, with no gender difference detected in any age group. The proportion of subjects exhibiting moderate and poor adaptability increased gradually with age. In conclusion, age, but not gender, appears to affect adaptation of postural sway with short-term practice, although some elderly subjects maintain postural sway velocity and adaptability capabilities similar to those of young subjects.
- 日本生理人類学会の論文
著者
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Horak Fay
Neurological Sciences Institute Of Oregon Health And Science University
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Fujiwara Katsuo
Graduate School Of Medical Science Kanazawa University
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Fujiwara Katsuo
Department Of Health And Physical Education College Of Liberal Arts Kanazawa University
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Maeda Kaoru
Department Of Physical Therapy Faculty Of Health Sciences Morinomiya University Of Health Sciences
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Maeda Kaoru
Morinomiya University Of Medical Sciences
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Maeda Kaoru
Department Of Physical Therapy Morinomiya University Of Medical Sciences
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Kiyota Takeo
Department of Hospital and Welfare Service, Faculty of Service Industries, University of Marketing a
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Kiyota Takeo
Department Of Hospital And Welfare Service Faculty Of Service Industries University Of Marketing And
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