Artery of Percheron
The artery of Percheron (AOP) is a rare anatomical 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.
|Artery of Percheron|
|Source||Posterior cerebral artery|
|Supplies||Both sides of thalamus and midbrain|
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.
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