Posterior interosseous artery

The Posterior interosseous artery is a branch of the common interosseous artery that supplies blood to the posterior compartment of the forearm. It is a significant artery in the human body, playing a crucial role in the circulatory system.

Etymology

The term "interosseous" is derived from the Latin words "inter," meaning between, and "osseous," meaning bony. Thus, "interosseous" refers to something located between bones, in this case, an artery.

Anatomy

The posterior interosseous artery arises from the common interosseous artery, which itself is a branch of the ulnar artery. It descends down the forearm, running on the interosseous membrane, which is a fibrous sheet connecting the two bones of the forearm - the radius and the ulna.

Function

The primary function of the posterior interosseous artery is to supply blood to the muscles and skin in the posterior compartment of the forearm. These muscles are primarily responsible for the extension of the wrist and fingers.

Clinical significance

The posterior interosseous artery is of clinical significance as it can be involved in various medical conditions. For instance, compression or damage to this artery can lead to Posterior interosseous syndrome, a condition characterized by the inability to extend the fingers and thumb.

Related terms

• Anterior interosseous artery: An artery that supplies blood to the anterior compartment of the forearm.
• Common interosseous artery: An artery that gives rise to the anterior and posterior interosseous arteries.
• Interosseous membrane of forearm: A fibrous sheet that connects the two bones of the forearm and provides attachment for the interosseous arteries.

See also

• List of arteries of the human body
• Circulatory system
• Forearm

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