During the first stage of increased intracranial pressure, the brain attempts to compensate by employing a mechanism called:

A. Rejuvenation –. This is not a physiological term used in the context of ICP or brain compensation. B. Autoregulation –This is the brain’s ability to maintain consistent cerebral blood flow (CBF) despite changes in systemic blood pressure. In early stages of increased ICP, autoregulation helps maintain oxygen and nutrient delivery to brain tissue by adjusting cerebral vessel diameter. C. Percolation –This term is not relevant in neurophysiology or ICP management. D. Demarcation –This refers more to distinguishing boundaries between tissues (e.g., in gangrene), not compensatory mechanisms for ICP.