身体各部位の動揺の周波数分析による立位姿勢調節の検討

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This study was designed to investigate the postural control by means of frequency analysis of the swaying movements of various body portions (caput fibulae, lumbale, cervicale and vertex) during maintaing a quiet standing posture with c1osed stance and eyes opened or closed. The subjects were healthy male students of the university (N=30), aged 18 to 23 years. Body sway was picked up with potentiometers connected to the above mentioned body portions with silk threads. Mean of spectrum amplitudes of the body sway in each frequency band of 0.1-0.5Hz and 0.5-1.0Hz (MSA_0.5 and MSA_1.0) was calcu1ated. The results were summarized as follows: 1) The higher the body portion, the greater was the MSA_0.5 and MSA_1.0. Those values of the body portion below lumbale were greater in lateral direction (LA) than in anterioposterior direction (AP). In the body portion above lumbale, the difference (D) of MSA_0.5 or MSA_1.0 between adjacent body portions for unit height was considerably greater in LA than in AP. These results indicate that the lower body below lumbale is more stable in AP than in LA, while the upper body above 1umbale is more stable in LA than in AP. 2) In the lower body below lumbale, the ratio of D in upper part to that in lower part of adjacencies was smaller in 0.5-1.0Hz than in 0.1-0.5Hz. In the upper body above lumbale this value was smaller in 0.1-0.5 Hz than in 0.5-1.0 Hz. These results suggest that the high frequency component of the body sway is well-controlled and stab1e in the lower body, while the low frequency component of the body sway is well-controlled and stable in the upper body.
社団法人日本体育学会の論文
1985-12-01

身体各部位の動揺の周波数分析による立位姿勢調節の検討

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