OPPONEN POLLICIS
| ORIGIN Flexor retinaculum and tubercle of trapezium |
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| INSERTION Whole of radial border of 1st metacarpal |
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| ACTION Opposes (medially rotates and flexes ) carpometacarpal and metacarpophalangeal joints of thumb |
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| NERVE Recurrent (muscular) branch of median nerve (C8,T1) (may also be from deep branch of ulnar nerve (T1)) |