Reconsidering postural response to external disturbance - Focusing on the functions of monoarticular and biarticular muscles -

本研究的目的是阐明站立姿势控制、在有和没有肌肉张力的情况下对外部干扰(地面突然移动)的反应、。受试者、7名健康学生、被要求在有和没有双关节肌张力的前后外部干扰(钢板的移动)中保持站立姿势。采集地面反作用力、，分析小腿肌肉活动和关节角度。无论是后向还是前向外部干扰、，由于肌肉张力、，朝向地板方向的控制力增加，肌肉活动度和关节角度变化不大。结果提示，单关节肌肉和双关节肌肉协同作用于、，降低活动、，双关节肌肉在姿势控制中具有重要的调节功能。

The aim of the present study was to clarify standing posture control、 with and withoutmuscle tension in biarticular muscles、 in response to external disturbance (the ground suddenly shifting). Subjects、 seven healthy students、 were asked to maintain a standing posture on a force plate during anterior and posterior external disturbance (movement of the plate) with and without muscle tension in biarticular muscles. Ground reaction force was captured、 to analyze muscle activity in the lower limbs and joint angles. With both posterior and anterior external disturbance、 there was an increase in control in the direction towards the floor due to muscle tension、 and there were small changes observed in muscle activity and joint angles. The results suggested that monoarticular and biarticular muscles were made to function cooperatively、 reducing activity、 andbiarticular muscles have an important adjusting function in postural control.