Origin: Common forearm extensor tendon from the lateral border of the Distal humerus, the posterior border of the Ulna and the common forearm extensor origin
Insertion: dorsal base of the Small Metacarpal
Function: extension and ulnar deviation of the Wrist along with other muscles which extend the wrist and ulnarly deviate the wrist and extends the small finger carpometacarpal joint
Nerve: Posterior Interosseous Nerve
Reflex:
| C7
| |