Abductor Pollicis Longus
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Action of abductor pollicus longus
Abducts thumb and extends at carpometacarpal joint
Distal attachment of abductor pollicis longus
Base of 1st metacarpal
Innervation of abductor pollicus longus
Posterior interosseous nerve Continuation of deep radial nerve
Proximal attachment of abductor pollicis longus
Posterior surface of proximal halves of ulna, radius, and interosseous membrane