SUPINATOR
| ORIGIN Deep part (horizontal):supinator crest and fossa of ulna. Superficial part (downwards): lateral epicondyle and lateral ligament of elbow and annular ligament |
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| INSERTION Neck and shaft of radius, between anterior and posterior oblique lines |
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| ACTION Supinates forearm. Only acts alone when elbow extended |
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| NERVE Posterior interosseous nerve (C5, 6) |