Supinator muscle

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The supinator muscle is a muscle in the forearm that acts to supinate to the forearm.

Supinator muscle Flexor digitorum profundus muscle Flexor carpi ulnaris muscle Extensor pollicis longus muscle Extensor pollicis brevis muscle Abductor pollicis longus muscle Extensor indicis muscle Anconeus muscle Olecranon Humeral medial epicondyle Humeral lateral epicondyle Ulna Humerus Muscles of the hand (Anatomy map) Muscles of the shoulder (Anatomy map)'The deep muscles of the forearm.'

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A left arm, with the palm facing toward the camera.



The supinator originates from the ulna, the humerus, and two nearby ligaments. The supinator is divided into two parts, the deep and the superficial part. The deep part originates from the supinator crest of the ulna and the fossa of the ulna. The superficial part originates from the lateral epicondyle on the distal end of the humerus, the lateral ligament of the elbow and the radial annular ligament.


The supinator inserts on the neck and shaft of the radius.


The supinator is innervated by the posterior interosseous nerve (C5 and C6).

See also

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