Common Flexor Tendon at Medial Epicondyle

tendo communis flexorum ad epicondylum medialem

The common flexor tendon is the conjoint origin of the flexor carpi radialis, palmaris longus, flexor carpi ulnaris, and flexor digitorum superficialis from the medial epicondyle. The pronator teres also contributes. Together they form the medial epicondyle tendinous origin — the medial counterpart to the common extensor tendon at the lateral epicondyle.

Region: Upper Arm

Clinical Relevance

Clinical Notes

Medial epicondylitis (golfer's elbow) is degenerative tendinopathy of the common flexor origin — predominantly the pronator teres and flexor carpi radialis components — at the medial epicondyle. It produces medial elbow pain with resisted wrist flexion and forearm pronation. The ulnar nerve passes immediately posterior in the cubital tunnel and may be simultaneously irritated. Injection targeting the common flexor origin must avoid the adjacent ulnar nerve. PRP and progressive loading are first-line after activity modification.

Pathology

Common Injuries & Conditions

Medial Epicondylitis (Golfer's Elbow)

Degenerative tendinopathy of the common flexor tendon origin at the medial epicondyle producing medial elbow pain with resisted wrist flexion and pronation, managed by eccentric loading, injection, and addressing associated ulnar nerve involvement.

Common Flexor Tendon Rupture

Acute avulsion of the common flexor origin from a sudden forceful extension-supination mechanism producing sudden medial elbow pain, swelling, and weakness of wrist flexion, requiring surgical repair in active patients.