Circle of willis
Circle of willis 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. The arrangement of the brain’s arteries into the Circle of Willis creates redundancies or collaterals in the cerebral circulation. It lies in the subarachnoid space within the deep interpeduncular cistern. Surrounds the optic chiasma, the […]
