Anatomy - Abductor pollicis longus muscle

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Abductor pollicis longus - Action

Abduction of the thumb at the carpometacarpal joint, Abduction of the wrist, Extension of the thumb at the carpometacarpal joint, Weak supination of the forearm from a pronated position, Weak flexion of the wrist joint

Abductor pollicis longus - Insertion

Base of the first metacarpal (dorsal lateral surface)

Abductor pollicis longus - Origin

Posterior aspect of the radius and midshaft of the ulna

Abductor pollicis longus - Innervation

Radial nerve (C6, C7)


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