Increased functional and directed corticomuscular connectivity after dynamic motor practice but not isometric motor practice.

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Tác giả: Jonas Rud Bjørndal, Jesper Lundbye-Jensen, August Lomholt Nielsen, Malene Norup, Meaghan Elizabeth Spedden, Patrick Wiegel

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: United States : Journal of neurophysiology , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 89611

How do differences in the constraints of a practiced motor task affect oscillatory functional connectivity between the motor cortex and muscle? Here, we investigate corticomuscular (CM) and intermuscular (IM) coherence during the hold-phase of a dynamic position control (PC) and isometric force control (FC) task. We also investigate the effects of PC motor practice requiring precise wrist flexions to designated target positions, and effects of FC motor practice involving isometric wrist flexions to designated target force levels or rest in a control group. In forty-six young healthy adults (aged 20-30), full-cap electroencephalography (EEG) and electromyography (EMG) were recorded from the flexor and extensor carpi radialis muscles during the tasks. Beta-band (15-35 Hz) CM and IM coherence were investigated as a task-related marker of oscillatory activity in the corticospinal system. At baseline, higher CM coupling was demonstrated during position control compared to force control. Following PC motor practice, CM beta-band coherence increased (
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