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Common interosseous artery
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The common interosseous artery is the third main branch of the ulnar artery. It runs in the distal portion of the cubital fossa, posterior to the upper border of the interosseous membrane. After its short course, the common interosseous artery gives rise to the anterior and posterior interosseous arteries of the forearm.
Via these terminal branches, it supplies the bones and muscles of the forearm.
This article will discuss the anatomy and function of the common interosseous artery.
| Origin | Ulnar artery (proximal part) |
| Branches | Anterior interosseous and posterior interosseous arteries |
| Supply | Via anterior interosseous artery: radius, ulna, deep forearm flexors Via posterior interosseous artery: superficial and deep forearm extensors |
Origin and course
The common interosseous artery is approximately 1 cm long and begins its course by arising posterolateral to the ulnar artery at the level of the radial tuberosity. It runs deep towards the superior border of the interosseous membrane to split into its two terminal branches, the anterior and posterior interosseous arteries.
Branches and supply
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The anterior interosseous artery runs along the anterior side of the interosseous membrane and supplies radius, ulna and the deep flexor compartment of the forearm.
The posterior interosseous artery is usually smaller than its anterior counterpart. It pierces the superior portion of the interosseous membrane to enter the extensor compartment of the forearm and gives off the recurrent interosseous artery.
Master the basics of the arteries of the upper extremity with our interactive learning materials.
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