Last reviewed dd mmm yyyy. Last edited dd mmm yyyy
Abductor pollicus longus is one of the deep muscles on the extensor surface of the forearm.
It arises from the middle posterior third of the:
It inserts into the base of the first metacarpal having traversed the first dorsal extensor compartment of the wrist. It forms the radial border of the anatomical snuffbox at the wrist.
Its action is to abduct and extend the thumb at the carpometacarpal joint.
Abductor pollicis longus is supplied by the posterior interosseous nerve (C7, c8).
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.