Flexor Carpi Ulnaris

Origin = (this muscle has two heads)

Humeral head - Medial epicondyle of the humerus by means of the common tendon.

Ulnar head - Upper two-thirds of the dorsal border of the ulna including the olecranon process.

Insertion = Hamate, pisiform, and the palmar surface of the base of the fifth metacarpal.

Action = Wrist joint flexion and ulnar deviation.