Deep Branch of the Ulnar Nerve

Superficial Branch of the Ulnar Nerve

The Deep Branch of the Ulnar nerve accompanies the deep branch of the ulnar artery between the abductor digiti minimi and the flexor digiti minimi brevis. The deep branch of the ulnar nerve innervates the muscles of the hypothenar eminence (except the palmaris brevis), the ulnar two most lumbricals, the adductor pollicis, and all the interossei.

The Superficial Branch of the Ulnar nerve courses with the superficial palmar arch. The superficial branch of the ulnar nerve divides into the proper palmar digital nerve to the ulnar margin of the little finger, and into a common palmar digital nerve, which divides into two proper palmar digital nerves for the fourth and fifth digits.