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May 14, 2020 · The circle of Willis is a junction of arteries at the base of the brain that allows blood flow to both hemispheres. Learn about its structure, function, variations, and diseases that affect it.
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 structures in reptiles, birds and mammals, including humans.
Oct 30, 2023 · The primary role of the circle of Willis is to form anastomoses between the internal carotid arteries and the vertebrobasilar system of arteries on the ventral aspect of the brain. These connections provide channels that allow blood flow between the anterior and posterior cerebral circulations.
- Medical Content
- 13 min
Jun 4, 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 damage to brain tissues is avoided or reduced.
Jul 24, 2023 · The circle of Willis is a ring of vessels connecting the anterior and posterior circulations of the brain. The ring is bounded anteriorly by a single anterior communicating artery (ACom), which connects the bilateral anterior cerebral arteries (ACA).
- Julie Rosner, Vamsi Reddy, Forshing Lui
- 2023/07/24
- 2018
Mar 31, 2024 · 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 (circulus arteriosus cerebri) is an anastomotic system of arteries that sits at the base of the brain. The “circle” was named after Thomas Willis by his student Richard...
