Origin: Transverse carpal ligament, the Scaphoid and Trapezium
Insertion: Radial base of Thumb Proximal Phalanx and the thumb extensor mechanism
Function: Abducts the Thumb basal (carpometacarpal) Joint along with other muscles which palmar abduct and radial abduct the basal joint, and extends the thumb interphalangeal Joint
Nerve: Motor Branch of Median Nerve
Artery: Superficial Volar Branch of Radial artery