Inferior ulnar collateral artery

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The inferior ulnar collateral artery is a small artery in the arm. It is a branch of the brachial artery and plays a role in the blood supply to the elbow region.

Anatomy

The inferior ulnar collateral artery arises from the brachial artery just above the elbow. It descends towards the elbow, running in close proximity to the medial epicondyle of the humerus.

The artery then passes anterior to the medial epicondyle and anastomoses with the anterior ulnar recurrent artery, a branch of the ulnar artery. This anastomosis is part of the periarticular arterial anastomosis of the elbow, which provides collateral circulation around the joint.

Function

The primary function of the inferior ulnar collateral artery is to contribute to the blood supply of the elbow joint and surrounding structures. It is part of the network of vessels that ensure adequate blood flow to the elbow, especially during flexion and extension movements that might otherwise compress the main arteries.

Clinical significance

Understanding the anatomy of the inferior ulnar collateral artery is important in surgical procedures involving the elbow, such as elbow arthroscopy or fracture repair. Injury to this artery can lead to compromised blood flow to the elbow region, potentially affecting healing and function.

Also see

• Brachial artery
• Ulnar artery
• Elbow joint
• Anastomosis

References

• Gray's Anatomy (Public Domain Text)

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  Gray's Anatomy Plate 526
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  Gray's Anatomy Plate 525
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  Slide 5 UUU