Cortical blood flow

Cortical blood flow refers to the movement of blood through the vasculature of the cerebral cortex. It is not a molecule, receptor, or protein but rather a physiological parameter describing how well oxygenated blood reaches cortical neurons and glia. Regulation of cortical (or more broadly, cerebral) blood flow is critical for normal brain function because it ensures that metabolic demands are met while removing waste products. This regulation involves several overlapping mechanisms: * Autoregulation: The ability of cerebral vessels to maintain relatively constant perfusion despite fluctuations in systemic arterial pressure. This process relies on myogenic responses in arteries/arterioles as well as humoral factors like CO₂/O₂ levels and neurogenic influences from perivascular nerves.[2][4][6][8] * Neurovascular coupling: Local increases in neuronal activity trigger increased local perfusion ("functional hyperemia") via signaling between neurons, astrocytes, endothelial cells, and vascular smooth muscle.[4][9] * Vasoactive mediators: Nitric oxide (NO), prostaglandins such as PGE2 (especially prominent in cortical areas), eicosanoids, endothelins, potassium ions, acid metabolites—all modulate vessel tone.[4][9] Disruption or dysregulation of cortical/cerebral blood flow underlies many neurological diseases including stroke and dementia. However, "cortical blood flow" itself is not a druggable target or molecular entity; it is an emergent property resulting from complex interactions among multiple cell types and signaling pathways within the cerebrovasculature. Because "cortical blood flow" does not refer to a specific molecule or receptor but rather a physiological phenomenon/parameter measured by imaging or hemodynamic techniques—and because there are no drugs that directly bind "cortical blood flow"—it should not be considered a canonical therapeutic target for structured databases focused on molecular targets.[1][2][4]

Other names

Cortical blood flowCerebral cortical blood flowCBF in cortex