Anterior interosseous artery

The anterior interosseous artery is also known as the volar interosseous artery. It is an artery of the forearm. Volar refers to the underside, so it indicates an artery that runs on the lower side of the forearm rather than on the upper side. It flows along the interosseous membrane, a fibrous tissue that connects the ulna and the radius. The volar interosseous branch of the median nerve runs beside the artery. The flexor digitorum profundis, the muscle that flexes the fingers, and the flexor policis longus, the muscle that flexes the thumb, overlap the anterior interosseous artery. When it reaches the pronator quadratus, the muscle that turns the palm downwards, it passes through the interosseous membrane to the back of the forearm. At that point it merges (anastomoses) with the dorsal interosseous artery. The anterior interosseous artery continues to the back of the wrist, where it merges with the dorsal carpal network, a structure where several arteries merge into three dorsal metacarpal arteries.
Written and medically reviewed by the Healthline Editorial Team
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In Depth: Anterior interosseous artery

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