hjärnperfusion
Hjärnperfusion, or brain perfusion, refers to the passage of blood through the brain’s vasculature to deliver oxygen and nutrients and to remove waste. It is typically described by cerebral blood flow (CBF), the amount of blood reaching a given amount of brain tissue per unit time (commonly ml/100 g/min). Perfusion depends on cerebral perfusion pressure, vascular resistance, and the integrity of the microcirculation. Cerebral autoregulation helps keep CBF relatively constant over a range of blood pressures, while metabolic demand, carbon dioxide levels, and neural activity can modulate perfusion.
Physiology and regulation are governed by neurovascular coupling, whereby increases in neuronal activity trigger local vasodilation
Measurement and imaging techniques for hjärnperfusion include invasive and noninvasive methods. Noninvasive imaging commonly used in