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Action: Extends 1st metacarpalphalangeal joint Origin - Posterior radius; posterior ulna; interosseus membrane Insertion - Proximal phalanx of pollexInnervation - Deep radial nerve

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1.
Action: Extends 1st metacarpalphalangeal joint
Origin - Posterior radius; posterior ulna; interosseus membrane
Insertion - Proximal phalanx of pollex
Innervation - Deep radial nerve





 
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