Visual feedback is essential to maintain force steadiness during isometric contractions, but its effect depends on the specific feedback provided. Here, we used corticomuscular coherence (CMC) to investigate the effects of different visual gains (sensitivity of visual feedback at high, medium, and low levels) and the presence or absence of feedback on force control. Eight healthy adults were involved, recording the intramuscular electromyogram (iEMG) of the soleus muscle and electroencephalogram (EEG) of the primary motor cortex region. The results indicated that the alpha frequency band exhibited significant differences ( \(p<\) 0.05) in CMC between high and low visual gain, and between the presence and absence of visual feedback. These findings highlight the sensitivity of the alpha band to visuomotor integration during isometric force motor control tasks.