Which of the following best describes the cerebral arterial circle (circle of Willis)?

Question

Which of the following best describes the cerebral arterial circle (circle of Willis)?

• An anastomosis circling the entire cortex
• A portal system connecting the hypothalamus with the anterior pituitary
O Formed by the superior and inferior sagittal sinuses
O An anastomosis surrounding the pituitary gland
O A short anastomosis found in the cerebellum

Answer 1

An anastomosis circling the entire cortex

Answer 2

The cerebral arterial circle, also known as the circle of Willis, is best described as an anastomosis circling the entire cortex. It is a circle of interconnected arteries located at the base of the brain, formed by the anterior and posterior cerebral arteries, as well as the communicating arteries. This circle provides collateral blood flow and helps to equalize blood pressure within the brain.