Relationship between Amplitude Parameters of Stimulation Myography and Bimanual Coordination in Men and Women during Performance of Motor Tasks of Different Complexity

Stable correlations between the amplitude parameters of stimulation myography of forearm muscles and parameters of bimanual coordination of complex voluntary purposeful movements during performance of tasks of different complexity were studied in men and women. We found that men are characterized by higher coordination of hand movements and selective involvement of motor units of flexor and extensor muscles innervated by stimulated nerves during motor task performance with minimum number of errors. In women characterized by relatively low level of bimanual coordination, generalized involvement of neuromuscular units of the right and left forearms into realization of motor programs, potentiation of interactions with increasing the task complexity, and correction after errors were observed.