EEG-EMG Analysis on Corticomuscular Coherence of Middle Finger Flexion Tasks

Over the last few years much research has been devoted to investigate the synchronization between cortical motor and neuromuscular activity as electroencephalogram (EEG) and surface EMG (sEMG), which could elicit a new research idea in the field of sports medicine and rehabilitation engineering. Corticomuscular coherence (CMC) is a method combining the brain with muscles, which indicates the coordination of motor control. In order to examine modulation of the CMC in diverse motion modes, ten healthy young right-handed adults performed voluntary finger flexion, simulated finger flexion and motor imagination tasks at short intervals of 2 s. EEG and sEMG were recorded simultaneously from the primarymotor cortex and the musculusflexorperforatus, respectively. The extreme points of improved cross-correlation coefficient, and partial directional coherent (PDC) algorithm were used to compare and analyze the coherences under different motion tasks. We found that the strongest coherence showed up during stimulation task. The results suggest clinical reference to build rehabilitative treatment protocol in the future.