published his "Cerebri Anatome," in which he described, at the base of the brain, the arterial anastomosis which since then has borne his name. In this book, there is a very interesting description of an experiment? Carotidiek Arteries be laid bare on either side of the Cervix or the hinder part of the Head, so that their little Tubes' or Pipes, about half an inch long, may be exhibited togethe...

BACKGROUND The Circle of Willis (CoW) is an important collateral pathway of the cerebral blood flow. An experimental study of the cerebral blood flow (CBF) distribution in different anatomical variations may help to a better understanding of the collateral mechanism of the CoW. METHODS An in-vitro test rig was developed to simulate the physiological cerebral blood flow in the CoW. Ten anatomi...

The Circle of Willis (CoW) (Figure 1) is a ring-like arterial structure located at the base of the brain. It is the major arterial anastomoses in the brain and is responsible for the distribution of oxygenated blood throughout the cerebral mass. The Internal Carotid (ICA) and Basilar (BA) arteries bring blood into the CoW and are termed afferent arteries. The Anterior (ACA), Middle (MCA), and P...