Abductor Pollicis Longus



Tendons

Origin: Posterior surface of the Ulna, the radioulnar interosseous membrane and the middle third of posterior surface of the Radius

Insertion: Radial dorsal base of the Thumb Metacarpal, Variably the dorsal Trapezium and the radial surface of the Abductor pollicis longus muscle

Function: Abducts the thumb basal joint, along with other muscles which radially abduct the thumb. Also radially deviates the wrist along with other mucles which produce wrist radial abduction

Nerve: Posterior Interosseous Nerve

Artery: Posterior Interosseous artery

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