Larger terminal branch of the medial cord, receiving fibres from (C7) C8 & T1.
Descends the medial arm; passes posterior to the medial epicondyle of the humerus, then descends the ulnar side of the forearm to the hand.
Flexor carpi ulnaris and ulnar half of flexor digitorum profundus; most intrinsic muscles of the hand
Skin of the hand medial to the axial line of digit 4.
The autonomous zone for the ulnar nerve is the distal phalanx of the little ﬁnger. There is loss of abduction and adduction of all ﬁngers. Claw hand deformity of the hand results from hyperextension of the metacarpophalangeal joints and ﬂexion of the interphalangeal joints.