The palmaris brevis is an intrinsic muscle of the hand. It is a small, thin muscle, found superficially in the subcutaneous tissue of the hypothenar eminence.
- Attachments: Originates from the palmar aponeurosis and flexor retinaculum and attaches to the dermis of the skin on the medial margin of the hand.
- Actions: Wrinkles the skin of the hypothenar eminence and deepens the curvature of the hand, improving grip.
- Innervation: Ulnar nerve.
- Blood Supply: Superficial palmar arch