Muscle Opposite the Little Finger of the Hand (M. Opponens Digiti Minimi, Pna)

The muscle opposing the little finger of the hand (lat. m. opponens digiti minimi, pna) is a small muscle of the forearm, located in the deep layer of the muscles of the palm.

It begins as a ligament from the uncinate process of the ulna and is directed obliquely to the palm, where it passes into a tendon covering the palmar surface of the base of the fifth metacarpal bone.

The function of the muscle is opposition (abduction to the side) of the fifth finger of the hand. Innervation is carried out by the ulnar nerve (n. ulnaris).