Muscle Atlas


Origin: Lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and crest of ulna
Insertion: Lateral, posterior and anterior surfaces of proximal 1/3 of radius
Action: Supinates forearm (i.e., rotates radius to turn palm anteriorly)
Innervation: Deep branch of radial nerve (C5 and C6)
Arterial Supply: Recurrent interosseous artery

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