足踏み検査に見られる身体重心動揺軌跡の分析の研究--左右乗り換え時間の検討

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The body equilibrium control is maintained by two mechanisms. One is the mechanism of dynamic equilibrium control and the other is that of static equilibrium control. We designed a "Kinetogravicorder" for the analysis of the dynamic control mechanism and administered a "stepping test" (Fukuda's method) as the loading for the examination with this device. The stepping movement which we observed this time is an entirely different movement from the walking movement we had used before, and is an effective test method for the determination of stepping deviations.We made our analysis by loading different rhythms and different visual influences (light, darkness, eyes open and closed).The work required for stepping rhythms of the left and right feet coordinated with the central nervous system and the refractory system for movement. We, therefore, measured the duration of the contact of the left and right foot-soles with the floor, and the time it took for the swing to go from the left foot to the right and vice versa in the stepping movement, and analyzed the results.In the rhythmic stepping movement, the contact times of the left and right foot-soles at different rhythms of 0.8Hz, 1.0Hz and 1.2Hz were found to change proportionally to the rhythm. However, there was no significant difference in the time of the swing from the left to the right feet and vice versa between the frequencies of 1.0Hz and 1.2Hz, with no indication of a proportional relationship.We concluded from the above results that the central control factor working against the stepping rhythm was providing the control during the duration of the plantar contact and the swing duration had a great deal to do with the spinal level control of refractory function.With regards to the deviation produced under different visual influences, we discovered that when a person was right-handed, the left foot was the dominant supporter of the axis in the stepping movement. Therefore, from the variation of contact time of the right foot, we concluded that the time factor in the right foot contact duration would be an important factor of stepping deviation.
耳鼻咽喉科臨床学会の論文

足踏み検査に見られる身体重心動揺軌跡の分析の研究--左右乗り換え時間の検討

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