Abductor digiti minimi muscle (Hand)
The abductor digiti minimi muscle is a muscle in the hand that abducts the little finger (pulls it away from the rest of the hand). It can be easily palpated at the outside edge of the hand below the little finger. There is an equivalent muscle in the foot with the same name, the abductor digiti minimi muscle (Foot).
The abductor digiti minimi originates from several locations in the carpus - the lower section of the hand that contains the wrist bones. It attaches to the pisiform bone, the pisohamate ligament between the pisiform bone and the hamate bone, and the flexor retinaculum.
The abductor digiti minimi is innervated by the deep branch of the ulnar nerve (C8 and T1).