Abductor Pollicis Longus

MusclePro

Anatomy

Origin: Posterior (dorsal) surface of shaft of radius, ulna, interosseous membrane.
Insertion: Dorsal surface of base of first metacarpal bone.
Nerve: Radial nerve (C7, C8).
Actions: Abducts, laterally rotates, and extends thumb; abducts wrist.

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