J0204-1-4 筋音センサを用いた筋状態評価に関する研究(生体振動計測とその応用(1))

概要

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In this study, a mechanomyogram (MMG) sensor system for monitoring muscle conditions is developed. The polyvinylidene fluoride (PVDF) film is used as the sensory receptor of the MMG sensor. The sensor performance is verified by the fundamental experiment. The results show that the mean power frequency (MPF) of the sensor output is related to firing rate of action potential (AP) of muscle and the variance of the sensor output is related to the activity of fast fibers and complete recruitment. Next, muscle activities of isometric contraction are studied using the developed MMG sensor before and after muscle fatigue. Measurements were conducted on biceps and triceps brachii of healthy subjects with load. Experimental results show that contraction of fast fibers is occurred earlier and fast fibers activity increase earlier due to muscle fatigue. Focusing on the time shift of local maximum point in MPF and decrease of growth rate in variance, parameters for evaluation of muscle fatigue degree are proposed.
社団法人日本機械学会の論文
2009-09-12