Saturday, August 20, 2011

Anterior Cerebral Artery

The anterior cerebral artery is one of a pair of arteries supplying the anterior three fourths of one of the brain hemispheres with oxygenated blood. Arising from the internal carotid artery, the anterior cerebral artery has three segments: 1) A1, which runs from point of origin to the anterior communicating artery; 2) A2, which extends from anterior communicating artery to the bifurcation forming the pericallosal and callosomarginal arteries, giving off the recurrent artery of Heubner; 3) A3, which runs posteriorly in the pericallosal sulcus to form the internal parietal arteries (superior, inferior) and the precuneal artery.