Percheron Arteries

Percheron Arteries
Brain Arteries

The artery of Percheron (AOP) is a rare anatomic variation in the brain vascularization in which a single arterial trunk arises from the posterior cerebral artery (PCA) to supply both sides of brain structures; the thalamus and midbrain.


Clinical significance

The functions of the thalamus and midbrain include the regulation of consciousness, sleep and alertness. Occlusion of the artery of Percheron, for example by a clot, could result in a posterior circulation infarct impairing structures on both sides of the brain. This can produce a bizarre disturbance such as sleep from which the patient cannot be awakened.



The artery of Percheron was first described in 1973 by the French medical scientist Gerard Percheron.

© Pr Denis Ducreux 2014-2015