Identification of significance of autonomic nerve activity affecting motor control system

本研究的目的是确定自主神经活动对运动控制的影响。冷刺激是指受试者将手浸入冷水中，引起自主神经活动的激活。冷刺激使静站立时的体位摇摆增加，体位摇摆的主要成分是生理性震颤。此外，SOL的表面肌电活动具有节律性活动，其活动产生生理活动。为了研究自主神经活动与生理性震颤的关系，研究了冷刺激对运动匹配任务中食指运动表现的影响。结果表明，在冷刺激下，食指运动在8 ~ 12 Hz的最优方向波动增大。这些结果表明自主神经活动通过肌肉纺锤体敏感性调节运动控制。

The purpose of the study is to identify the effects of autonomic nerve activity on motor control. Activation of autonomic nerve activity was elicited by cold stimulation which is that subject immersed a hand in cold water. Postural sway during quiet standing increased by cold stimulation, and main component of postural sway is physiological tremor. In addition, surface electromyogram activity of SOL has the rhythmical activity, and its activity generates physiological activity. To examine the relation between autonomic nerve activity and physiological tremor, effects of cold stimulation on motor performance in index finger during movement matching tasks were investigated. As a result, the fluctuations from 8-12 Hz of index finger movements in optimal direction increased by cold stimulation. These results suggest that autonomic nerve activity regulates motor control via muscle spindle sensitivity.