Common flexor tendon

The common flexor tendon is a shared tendinous origin for several superficial flexor muscles of the forearm, arising firmly from the anterior aspect of the medial epicondyle of the humerus. The common flexor tendon serves as the primary proximal attachment for the following muscles:

• Flexor Carpi Ulnaris

• Palmaris Longus

• Flexor Carpi Radialis

• Pronator teres

• Flexor Digitorum Superficialis (specifically its humeroulnar head)

While the common flexor tendon is a major origin, most of the above-mentioned superficial flexor muscles also possess additional heads or points of origin from various other sites in the forearm:

• The flexor carpi ulnaris has an additional origin from the olecranon process and the posterior border of the ulna.

• The pronator teres gains additional fibers from the coronoid process of the ulna (its ulnar head).

• The flexor digitorum superficialis has a significant radial head arising from the upper anterior border of the radius.