Supinator muscle

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Description:

Origin:
Posterior surface of the lateral epicondyle of the humerus, radial collateral ligament, annular ligament, and the lateral edge of the proximal ulna

Insertion:
Lateral and anterior surfaces of the proximal third of the shaft of radius

Actions:
Supinates the hand

Nerve supply:
Radial nerve

Blood supply:
Branches of the radial artery