Study on Development of Magnetic Stimulator aimed at Recovery of Muscle Fatigue

近年来，脉冲磁刺激方法在帕金森氏病的治疗或康复领域引起了人们的极大兴趣。然而，在临床科学领域，磁刺激的大小或方法并不广为人知。在目前的治疗中，人们热衷于使用强磁刺激。此外，刺激效应的作用机制的目标是刺激的力度，但目前还不清楚。本研究旨在开发新的磁刺激来恢复肌肉疲劳，注意涡流在人体内的分布。2006年，根据2004或2005年的实验数据，建立了疲劳的定量测量方法。根据肌肉疲劳的恢复效果，弱磁刺激对受试者的最大自主收缩(MVC)的下降幅度均为90%。提示弱磁刺激促进了肌肉疲劳的恢复。我们还研制了柔性磁线圈和肌肉疲劳恢复仪。然而，我们还不能估计所开发的仪器。作为未来的课题，我们对肌肉疲劳的恢复效果进行了定量的研究。

The method of pulsed magnetic stimulation has become of major interest lately in the field of therapy for Parkinson's disease or rehabilitation. In the territory of clinical science, however, magnitude or method of magnetic stimulation is not well known. A strong magnetic stimulation is devotedly used in current therapy. Moreover, the target of the mechanism of stimulation effect is forcality of stimulation, but it is not yet cleared.In this study, we aimed at the development of new magnetic stimulation for recovery of muscle fatigue, noticing the distribution of eddy current in the human body. In 2006, a quantitative measurement method of fatigue is established on basis of the experimental data in 2004 or 2005.According to the recovery effect for muscle fatigue, weak magnetic stimulation inhibits the decrement of maximum voluntary contraction (MVC) at the rate of 90% in every subjects. These results suggest that weak magnetic stimulation has promoted the recovery for muscle fatigue. We also developed the flexible magnetic coil and the instrument for restoration of fatigued muscle. However we could not yet estimate the developed instrument. As a future subject, we quantitatively investigate the recovery effect for muscle fatigue.