Spinal Cord Injury Center, University Hospital Balgrist, 8008, Zürich, Switzerland.
Neural Control of Movement Lab, Department of Health Sciences and Technology, ETH Zürich, 8057, Zürich, Switzerland.
Sci Rep. 2018 Apr 13;8(1):5959. doi: 10.1038/s41598-018-24498-6.
Cooperative hand movements (e.g. opening a bottle) are controlled by a task-specific neural coupling, reflected in EMG reflex responses contralateral to the stimulation site. In this study the contralateral reflex responses in forearm extensor muscles to ipsilateral ulnar nerve stimulation was analyzed at various resistance and velocities of cooperative hand movements. The size of contralateral reflex responses was closely related to the level of forearm muscle activation required to accomplish the various cooperative hand movement tasks. This indicates an automatic gain control of neural coupling that allows a rapid matching of corrective forces exerted at both sides of an object with the goal 'two hands one action'.
协同手部运动（例如打开瓶子）受特定任务的神经耦合控制，这反映在刺激部位对侧的肌电图反射反应中。在这项研究中，分析了在各种协同手部运动的阻力和速度下，对侧前臂伸肌的反射反应。对侧反射反应的大小与完成各种协同手部运动任务所需的前臂肌肉激活水平密切相关。这表明神经耦合的自动增益控制允许快速匹配对象两侧施加的校正力与“双手一个动作”的目标。
