Abductor digiti minimi (of hand)

  • The abductor digiti minimi (or abductor digiti minimi muscle, latin: musculus abductor digiti minimi) is one of the muscles of the little finger (hypothenar muscles) lying on the ulnar side of the palm.

    The abductor digiti minimi is the most superficial of the hypothenar muscles, lying above the flexor digiti minimi brevis and opponens digiti minimi.

    Origin

    The abductor digiti minimi originates from the flexor retinaculum and the pisiform bone.

    Insertion

    The abductor digiti minimi passes distally to the fifth finger and inserts onto the base of the proximal phalanx of the fifth digit, also known as the little finger.

    Action

    The main function of the abductor digiti minimi is to abduct the little finger.

    Innervation

    The abductor digiti minimi is innervated by the ulnar nerve.