The abductor pollicis brevis is a thenar muscle located within the hand. It forms the anterolateral aspect of the thenar eminence, overlying the opponens pollicis. Attachments: Originates from the tubercles of the scaphoid and trapezium and from the associated flexor retinaculum. Attaches to lateral aspect of the proximal phalanx of the thumb. Actions: Abduction of the thumb. Innervation: Median nerve (recurrent branch) Blood supply: Superficial palmar arch By TeachMeSeries Ltd (2025) Figure 1Palmar view of the thenar muscles. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article