The process of vascular constriction and dilation of the vessels in the brain to maintain a constant cerebral blood flow, regardless of cerebral perfusion pressure, is known as:

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This phenomenon is known as autoregulation. It is an important process that ensures that the brain receives a constant blood flow, even if blood pressure fluctuates. The vessels in the brain can constrict or dilate to maintain a constant flow of blood to the brain tissue. This helps to prevent damage to the brain cells that can occur when blood flow is interrupted or reduced.

The Process of Vascular Constriction and Dilation of the Vessels