Muscle Origin

Lateral epicondyle of humerus to lateral surface of the radius.

Lateral epicondyle of humerus, supinator crest of ulna, radial collateral ligament, annular ligament.


Lateral proximal radial shaft.

Attaches to the anterior and posterior oblique lines of the proximal radius.


Rotates forearm laterally; Supination.

Supinates forearm.

Innervation – Nerve control

Deep branch of the radial nerve.

It is innervated by the deep branch of the radial nerve. The deep branch then becomes the posterior interosseous nerve upon exiting the supinator muscle. Wiki


Radial recurrent artery.

The radial recurrent artery arises from the radial artery immediately below the elbow.

It ascends between the branches of the radial nerve, lying on the supinator muscle and then between the brachioradialis muscle and the brachialis muscle, supplying these muscles and the elbow-joint, and anastomosing with the terminal part of the profunda brachii. Wiki

Antagonist muscles

Pronator teres, pronator quadratus.

Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris, Flexor digitorum superficialis, Flexor digitorum profundus, Flexor pollicis longus, Pronator quadratus. American Academy of Manual Medicine

Pictures of muscles


Trigger Point Referrals


Stretching description








Additional Resources
American Academy of Manual Medicine

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