S0202-2-1 ヒト歩行中の外乱に対する下肢筋群筋線維の挙動の計測(人体機能の支援と解析(2))

概要

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Previous studies have reported the participation of the stretch reflex pathway in neuronal mechanisms in perturbed human walking. Muscle stretch is required to activate the stretch reflex pathway. However, reflex response was evoked without changes in joint angle when fall perturbation was applied during human walking. Therefore, we have to investigate the length of muscle fiber during perturbation in order to elucidate neuronal mechanisms. In the present study, we measured muscle fiber length (MEL) in the medial gastrocnemius muscle by using ultrasonography in perturbed human walking. We used three types of perturbations, that is, backward, fall and dorsiflexion. As a result of comparison of normal walking with each perturbation, reflex response was induced without extension of MFL. It is suggested that reflex response was not stretch reflex. And we constructed the measurement system that investigates the length of muscle fiber in perturbed human walking.
社団法人日本機械学会の論文
2009-09-12