直立時重心動揺の再現性について　　正常者の周波数分析

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タイトル別名
  • Reproduceability of Frequency Analysis of Body Sway in Normal Humans While Standing
  • 正常者の周波数分析

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Frequency-components of body sway while standing upright usually show some minor changes in normal individuals.<BR>The human standing posture depends on righting reflexes controlled by the multi-channel sensori-neuro-muscular system and several other factors, such as biorhythms of the body, the mental state, etc. However, we simply accept fluctuation of the data without considering the characteristic frequency patterns of body sway in both normal and ataxic patients.<BR>The reproduce ability and steadiness of the data of frequency analysis of the movement of the center of gravity were investigated repeatedly in three normal subjects standing erect on different occasions. The results were compared with the one-time data from 20 normal subjects. The three subjects stood for one minute with eyes open and for one minute with eyes closed nine to 11 times every one or two weeks. The same subjects stood for ten minutes with eyes closed and ten data of every one minute in each case were also investigated. The percentages of the sums of the amplitude in seven frequency ranges, decided arbitrarily, to the total amplitude under 10 Hz were calculated.<BR>It was found that the degree of fluctuation in the frequency pattern of body sway during repetitive standing, either continuously of at long intervals, remains within the limit of fluctuation observed in 20 normal subjects.

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