The abductor pollicis longus muscle, combined with the extensor pollicis brevis, creates a narrow, triangular muscle form which wraps around the lower end of the radius. The abductor pollicis longus originates on the back side of the ulna and radius and inserts at the base of the metacarpal bone of the thumb near the palm. The abductor pollicis longus is innervated by the radial nerve and is supplied by branches of the radial artery. This muscle extends the thumb away from the hand. It also rotates and flexes the hand at the wrist. The combination of the abductor pollicis longus and the extensor pollicis brevis forms the oblique carpal muscle group. Research Abductor Pollicis Longus
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Matt and Leela Probert
Abbreviations
Medicine
Research Abductor Pollicis Longus
