Medial epicondylitis most commonly involves which muscular structures?

Medial epicondylitis most commonly involves which muscular structures?

• A. Wrist extensors and pronator teres
• B. Wrist flexors and supinator
• C. Wrist extensors and supinator
• D. Wrist flexors and pronator teres

Answer: (A)

Medial epicondylitis is an overuse injury of the common flexor tendon at the medial epicondyle of the humerus. This tendon is the shared attachment for wrist flexors and the pronator teres, so the structures most likely to be affected are those muscles that originate there. Clinically, you’d expect pain at the medial epicondyle and weakness or pain with resisted wrist flexion and with forearm pronation, reflecting involvement of the wrist flexors and pronator teres at their common origin. The extensors and the supinator attach to different bony landmarks (lateral epicondyle or different origins), so they are not the typical players in medial epicondylitis. That’s why the combination of wrist flexors and pronator teres best fits this condition.

Medial epicondylitis is an overuse injury of the common flexor tendon at the medial epicondyle of the humerus. This tendon is the shared attachment for wrist flexors and the pronator teres, so the structures most likely to be affected are those muscles that originate there. Clinically, you’d expect pain at the medial epicondyle and weakness or pain with resisted wrist flexion and with forearm pronation, reflecting involvement of the wrist flexors and pronator teres at their common origin.

The extensors and the supinator attach to different bony landmarks (lateral epicondyle or different origins), so they are not the typical players in medial epicondylitis. That’s why the combination of wrist flexors and pronator teres best fits this condition.