Forearm motor unit control project

The aim of this project was to investigate how the nervous system modulates the common synaptic inputs to spinal motor neurons during a functionally relevant grip (grasping) compared to less functionally relevant hand tasks. Participants performed three different tasks: simultaneous four-finger flexion without thumb involvement (four-finger flexion), thumb flexion, and simultaneous flexion of both fingers and thumb (grasping). Motor units were decomposed from high-density surface electromyograms detected from the extrinsic finger flexor muscles using this algorithm and tracked across tasks. Motor unit discharge rate and common synaptic oscillations across the delta, alpha, and beta bands were calculated and compared between tasks.For further details, please refer to the <b>READ ME</b> file.

本研究旨在探究相较于功能性较低的手部任务，在具备功能相关性的抓握动作过程中，神经系统如何调控脊髓运动神经元所接收的共性突触输入。受试者完成三项不同任务：无拇指参与的四指同时屈曲（四指屈曲任务）、拇指屈曲任务，以及手指与拇指同步屈曲的抓握任务。采用该算法从手部外在屈肌采集的高密度表面肌电信号（high-density surface electromyograms）中分解出运动单位（motor unit），并在不同任务间对其进行追踪。随后计算并对比了各项任务间的运动单位放电率，以及δ、α、β频段内的共性突触振荡。如需进一步详情，请参阅<b>READ ME</b>文件。