Common interosseous artery
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| Artery: Common interosseous artery | |
|---|---|
| Diagram of the anastomosis around the elbow-joint. | |
| Arteries of the back of the forearm and hand. | |
| Latin | a. interossea communis |
| Gray's | subject #152 596 |
| Source | ulnar artery |
The common interosseous artery, about 1 cm. in length, arises immediately below the tuberosity of the radius, and, passing backward to the upper border of the interosseous membrane, divides into two branches, the volar and dorsal interosseous arteries.
[edit] Volar Interosseous Artery
The Volar Interosseous Artery (a. interossea volaris; anterior interosseous artery), passes down the forearm on the volar surface of the interosseous membrane.
It is accompanied by the volar interosseous branch of the median nerve, and overlapped by the contiguous margins of the Flexor digitorum profundus and Flexor pollicis longus, giving off in this situation muscular branches, and the nutrient arteries of the radius and ulna.
At the upper border of the Pronator quadratus it pierces the interosseous membrane and reaches the back of the forearm, where it anastomoses with the dorsal interosseous artery.
It then descends, in company with the terminal portion of the dorsal interosseous nerve, to the back of the wrist to join the dorsal carpal net-work.
The volar interosseous artery gives off a slender branch, the arteria mediana, which accompanies the median nerve, and gives offsets to its substance; this artery is sometimes much enlarged, and runs with the nerve into the palm of the hand.
Before it pierces the interosseous membrane the volar interosseous sends a branch downward behind the Pronator quadratus to join the volar carpal network.
[edit] Dorsal Interosseous Artery
The Dorsal Interosseous Artery (a. interossea dorsalis; posterior interosseous artery) passes backward between the oblique cord and the upper border of the interosseous membrane.
It appears between the contiguous borders of the Supinator and the Abductor pollicis longus, and runs down the back of the forearm between the superficial and deep layers of muscles, to both of which it distributes branches.
Where it lies upon the Abductor pollicis longus and the Extensor pollicis brevis, it is accompanied by the dorsal interosseous nerve.
At the lower part of the forearm it anastomoses with the termination of the volar interosseous artery, and with the dorsal carpal network.
It gives off, near its origin, the interosseous recurrent artery, which ascends to the interval between the lateral epicondyle and olecranon, on or through the fibers of the Supinator, but beneath the Anconæus, and anastomoses with the radial collateral branch of the profunda brachii, the posterior ulnar recurrent and the inferior ulnar collateral.
[edit] See also
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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