Anatomy Origin: Tubercles of scaphoid and trapezium and adjacent flexor retinaculum. Insertion: Proximal phalanx and extensor apparatus of the thumb. Key Relations: Is one of the muscles of the thenar eminence of the hand. Functions -Abduction of the thumb at the carpopmetacarpol and metacarpophalangeal joints. -Also assists in thumb opposition and extension. Supply Nerve Supply:The post Abductor pollicis brevis appeared first on Pocket Anatomy.
