咀嚼筋筋活動現象のスペクトル時系列による考察

抄録

This study elucidates the parameter of masticatory muscle activities and muscle fatigues in both time and frequency demain. Furthermore the 1/f fluctuation, reported by Johnson and Musha, in muscle figures was demonstrated from the view point of a biological responsibility. The Electromyographic investigation was performed by eleven male students as the subject. Biting forces were devided into three levels as a condition of this electromyographic power spectrum time series, that was, slightly, middle and heavy figuration.
Frequency components of biting power spectra increased the low regions as the biting forces increase. Maximum biting sustainment increased the frequency regions of the spectral powers as the biting time duration increased. At the middle force of biting figures the 1/f fluctuation was represented in the power spectral curves, and the fluctuations faced with a significant difference among three stages of biting conditions. According to the 1/f fluctuation as a biological response, frequency components of the muscle activity power have to select above 100-200 Hz ranges.