part of part of has muscle origin has muscle origin has muscle insertion has muscle insertion has muscle antagonist Homo sapiens radiale distal carpal bone 1 muscle of manus manus adductor pollicis muscle proximal epiphysis of proximal phalanx of manual digit 1 abductor pollicis brevis muscle http://upload.wikimedia.org/wikipedia/commons/7/77/Musculusabductorpollicisbrevis.png FMA:37373 musculus abductor pollicis brevis abductor pollicis brevis The abductor pollicis brevis is a muscle in the manus that functions as an abductor of the thumb. SCTID:181648007 abductor brevis UBERON:0008465 Wikipedia:Abductor_pollicis_brevis_muscle abductor pollicis muscle