Cerebral Blood Flow (CBF) refers to the blood supply to the brain, which is crucial for delivering oxygen and nutrients. The brain requires a constant flow of blood to function properly, as it consumes a significant amount of the body's energy. CBF is regulated by various mechanisms, including changes in blood vessel diameter and blood pressure. Maintaining adequate CBF is essential for brain health. Reduced blood flow can lead to conditions such as stroke or ischemia, where parts of the brain are deprived of oxygen. Conversely, increased CBF can occur during activities like exercise or mental tasks, reflecting the brain's dynamic response to its needs.