Palmaris brevis

  • The palmaris brevis (or palmaris brevis muscle, latin: musculus palmaris brevis) is a quadrilateral muscle of the hand lying on the ulnar side of the palm.

    Origin

    The palmaris brevis originates from the flexor retinaculum and the palmar aponeurosis.

    Insertion

    The palmaris brevis inserts into the skin folds on the ulnar side of the wrist.

    Action

    Contractions of the palmaris brevis form the skin folds on the ulnar side of the hand.

    Innervation

    The palmaris brevis is innervated by the ulnar nerve.