Abductor pollicis longus :-
Muscle details :-
one of the extrinsic muscles of the hand. As the name implies, its major function is to abduct the thumb at the wrist. Its tendon forms the anterior border of the anatomical snuffbox.
posterior surface of shafts of radius and ulna .
base of first metacarpal bone .
Nerve supply :-
deep branch of radial nerve .
adducts and extends thumb .