Learn about the circle of Willis , an anastomotic arterial ring at the base of the brain that connects the four main arteries that supply the brain. Find out its structure, location, and the vessels that arise from it. 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. The Circle of Willis represents a critical arterial anastomosis at the base of the brain, formed by the interconnection of major arteries that supply oxygenated blood to neural tissues. This polygonal structure ensures collateral circulation, protecting the brain from ischemia during vascular occlusions or variations in blood flow. Comprising branches from the internal carotid arteries and vertebral arteries, it plays a pivotal role in maintaining cerebral perfusion, highlighting its ... The Circle of Willis is a ring-like arterial structure located at the base of the brain which supplies blood to the brain and surrounding structures. It is a component of the cerebral circulation and comprise of five arteries.
