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Circle of Willis

The Circle of Willis is the joining area of several arteries at the bottom (inferior) side of the brain. At the Circle of Willis, the internal carotid arteries branch into smaller arteries that supply oxygenated blood to over 80% of the cerebrum.

Reviewed last on: 10/11/2005
Galit Kleiner-Fisman, M.D., Department of Neurology, Beth-Israel Deaconess Medical Center, Boston, MA. Review provided by VeriMed Healthcare Network.

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