The flexor carpi ulnaris is a muscle within the superficial compartment of the anterior forearm.
- Originates from the medial epicondyle of the humerus and the olecranon of the ulna.
- Attaches to the pisiform bone, hook of hamate, and base of the 5th metacarpal.
- Actions: Flexion and adduction at the wrist.
- Innervation: Ulnar nerve.
- Blood supply: Ulnar artery and posterior ulnar recurrent artery