Origin: Common extensor tendon of the lateral epicondyle the radial collateral ligament of the elbow and the deep forearm fascia
Insertion: Dorsal base of the Middle Metacarpal
Function: Extends and radially deviates the Wrist. Weak elbow flexor.
Nerve: Posterior Interosseous Nerve
Artery:
| Muscular Branches of Radial Artery | |
| Radial Recurrent artery |