Sunday, September 4, 2011

Posterior Communicating Artery

The posterior communicating artery is a paired oxygen-rich blood vessel that supplies the thalamus, hypothalamus, mammillary bodies, and optic chiasm. In most individuals, the posterior communicating artery arises from the internal carotid artery, connecting to the posterior cerebral artery as they form, together with the anterior and middle cerebral arteries, the circle of Willis. However, in some individual, the posterior communicating artery originates from the middle cerebral artery instead of the trunk of the internal carotid.