Flexor carpi ulnaris
Arms
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Humeral head: medial epicondyle; ulnar head: olecranon and upper back border of the ulna
- Insertion
- Pisiform, hook of the hamate and base of the fifth metacarpal
- Action
- Flexes the wrist and bends it toward the little-finger side
- Nerve supply
- Ulnar nerve (C7–T1)
The wrist flexor on the little-finger side of the forearm, with two heads joined by a tendinous arch. It steadies the wrist when gripping.