circle of Willis

The term circle of Willis refers to an anastomosing system of arteries that join to form a circle surrounding the hypophysis and optic chiasm at the base of the brain. It consists of the internal carotid arteries, the anterior communicating arteries, the posterior communicating arteries and the posterior cerebral arteries. It is not part of the brain ( Crosby-1962 ).

Also known as: circle of Willis

NeuroNames ID: 1468

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English

circle of Willis

Crosby-1962

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Species With The Structure

Equivalent By	Human	Macaque	Rat	Mouse
Internal Structure	Has The Structure	Relevant Data Not Located	Relevant Data Not Located	Relevant Data Not Located

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Internal Structure

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Homo sapiens (human)

circle of Willis

Crosby-1962

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