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Muscles of the Upper Extremity / Opponens Pollicis
Page: 1
| Origin |
Flexor retinaculum and tubercles of scaphoid and trapezium |
| Insertion |
Lateral side of 1st metacarpal |
| Action |
Draws 1st metacarpal laterally to oppose thumb toward center of palm and rotates it medially |
| Innervation |
Recurrent branch of median nerve (C8 and T1) |
Arterial
Supply |
Superficial palmar branch of the radial artery | |
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