FUNCTIONAL MOTOR INNERVATION OF BRACHIAL-PLEXUS ROOTS - AN INTRAOPERATIVE ELECTROPHYSIOLOGICAL STUDY

The electrophysiological properties of the normal brachial plexus and functional motor innervation were examined during the operation of tra nsfer of contralateral C7 transfer from the healthy side. Different ro ots of the brachial plexus were stimulated and maximum amplitudes were recorded. The results showed that functional motor innervation of bra chial plexus roots were: C5 mainly forms the axillary nerve to innerva te the deltoid muscle; C6 mainly forms the musculocutaneous nerve to i nnervate biceps; C7 mainly forms the radial nerve to innervate triceps ; C8 mainly forms the median nerve to innervate flexor digitorum super ficialis and profundus; and T1 mainly forms the ulnar nerve to innerva te the intrinsic muscles of the hand.