Circle of willis: The circle of Willis

The circle of Willis (CoW) is an anatomical structure that provides an anastomotic connection between the anterior and posterior circulations , providing collateral flow to affected brain regions in the event of arterial incompetency. An overview of the arterial blood supply to the brain, including the anterior and posterior cerebral circulation, in addition to the Circle of Willis . The circle of Willis (circulus arteriosus cerebri) is a vascular network at the brain's base that connects major arterial supplies, the internal carotid and vertebrobasilar systems. Forming a protective collateral pathway, it reduces ischemic risk by rerouting blood flow during blockages. The structure typically includes the anterior, middle, and posterior cerebral arteries (PCAs) linked by the anterior and posterior communicating (PCOM) arteries. [1] The circle of Willis encircles the stalk ... The circle of Willis is a junction of several important arteries at the bottom part of the brain. Learn more about its anatomy, function, and more.