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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.