Origin: Lateral epicondyle of the humerus, the common forearm extensor tendon and the forearm extensor intermuscular septa
Insertion: extensor mechanism of the digits and the dorsal bases of the Middle Phalanges
Function: Extends the MCP and the PIP joints and weakly extend the Wrist
Nerve: Posterior Interosseous Nerve
Artery: Posterior Interosseous artery