Cerebral artery vasodilation

Cerebral artery vasodilation is a physiological process involving the widening of cerebral arteries, which increases cerebral blood flow and reduces vascular resistance. This vasodilation results from the coordinated action of various molecular pathways, including the release of nitric oxide from endothelial cells, activation of potassium channels, response to metabolic factors (e.g., adenosine, potassium ions), autonomic neurotransmitter stimulation (via muscarinic and adrenergic receptors), and modulation by prostaglandins. Dysregulation of cerebral artery vasodilation is implicated in conditions such as stroke, cerebral small vessel disease, hypertensive encephalopathy, and edema. As a process, it is not a single drug target but a complex endpoint affected by numerous receptors and signaling molecules.

Other names

Cerebral vasodilationCerebral artery dilationCerebral arterial vasodilation

Nitric oxide-mediated smooth muscle relaxation\nEndothelium-dependent hyperpolarization\nActivation of endothelial calcium-activated potassium channels (SKCa, IKCa)\nStimulation of muscarinic (M5) and adrenergic receptors\nOpening of KATP and Kir6.1 potassium channels\nInhibition of angiotensin II signaling\nBlockade of mineralocorticoid receptors\nOther pathways (ATP, prostaglandin, gap junction-mediated signaling)