The flexor carpi ulnaris (FCU) is a muscle of the forearm that flexes and adducts at the wrist joint.

The humeral head originates from the medial epicondyle of the humerus via the common flexor tendon.

The tendon of flexor carpi ulnaris can be seen on the anterior surface of the distal forearm.

These exercises are used to prevent injury to the ulnar collateral ligament of elbow joint.

[3] Ulnar entrapment by the aponeurosis of the two heads of the flexor carpi ulnaris muscle may cause cubital tunnel syndrome.