Posterior Interosseous Artery

The Posterior and anterior Interosseous arteries arise from a common stem, the common interosseous artery. The posterior interosseous passes posterior to the interosseous membrane to reach the extensor compartment of the forearm. It supplies the extensors of the forearm in the posterior compartment. This artery does not run on the interosseous membrane, but courses between the superficial and deep layers of the extensor muscles in the company of the posterior interosseous nerve. It is mostly exhausted in the distal forearm and is replaced by the perforating branch of the anterior interosseous artery.