The circle of Willis (also called Willis' circle, loop of Willis, cerebral arterial circle, and Willis polygon) is a circulatory anastomosis that supplies blood to the brain and surrounding …

Sep 16, 2024 · What is the circle of Willis? The circle of Willis (CoW) is a ring- or pentagon-shaped structure of arteries located at the base of your brain. It’s where two essential blood …

Nov 6, 2025 · Structure The circle of Willis is located in the subarachnoid space at the base of the brain. It lies in close proximity to the optic chiasm. It is pentagonal-shaped and formed by the …

Dec 15, 2024 · The circle of Willis is a circle of arteries that act as a backup system should an artery in the brain become blocked or narrowed. If this occurs, blood can be rerouted so that …

Aug 24, 2025 · The Circle of Willis is an arterial ring that encircles the optic chiasm and pituitary stalk, providing a redundant blood supply system to mitigate risks from vascular disruptions.

Aug 29, 2025 · The circle of Willis (COW) or circulus arteriosus is an arterial polygon (heptagon) formed as the internal carotid and vertebral systems anastomose around the optic chiasm and …

Jul 24, 2023 · 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 …

Oct 30, 2023 · The main function of the circle of Willis is to provide a collateral blood flow between the anterior and posterior arterial systems of the brain. Additionally, it offers the alternate blood …

Nov 27, 2024 · 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.

Aug 2, 2025 · The Circle of Willis is a complex network of arteries at the base of the brain. This unique anatomical arrangement forms a circular or polygonal shape, connecting the brain’s …