Opponens digiti minimi (of foot)

  • The opponens digiti minimi (also opponens digiti minimi muscle, opponens digiti quinti, latin: musculus opponens digiti minimi) is a muscle of the sole of the foot located on the lateral side of the foot.

    It is often considered to be a portion of the flexor digiti minimi brevis instead of a distinct muscle.

    Origin

    The opponens digiti minimi originates from the base of the fifth metatarsal bone and the long plantar ligament or splits from the flexor digiti minimi brevis.

    Insertion

    The opponens digiti minimi inserts onto the lateral surface of the fifth metatarsal bone.

    Action

    The main functions of the opponens digiti minimi are adduction and opposition of the little toe.

    Innervation

    The opponens digiti minimi muscle of the foot is innervated by the lateral plantar nerve, one of the terminal branches of the tibial nerve.