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.
Review Date: 07/29/2009
Reviewed By: David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc., and David
C. Dugdale, III, MD, Professor of Medicine, Division of General
Medicine, Department of Medicine, University of Washington School
of Medicine. Previously reviewed by Daniel B. Hoch, PhD, MD,
Assistant Professor of Neurology, Harvard Medical School,
Department of Neurology, Massachusetts General Hospital.
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