Combined with the abductor pollicis longus, the extensor pollicis brevis (thumb muscle) creates a narrow, triangular muscle form which wraps around the lower end of the radius (the bone of the forearm on the thumb side). The extensor pollicis brevis originates from the back side of the radius and inserts in the base of the first phalanx of the thumb. It is innervated by the radial nerve and supplied by the posterior interosseous artery. This muscle extends the thumb and continued action rotates the hand. The combination of the abductor pollicis longus and the
extensor pollicis brevis forms the oblique carpal muscle group. Research Extensor Pollicis Brevis
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Medicine
Research Extensor Pollicis Brevis
