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Fig. 2 | The Journal of Physiological Sciences

Fig. 2

From: Cerebral blood flow regulation and cognitive function: a role of arterial baroreflex function

Fig. 2

Paradox of CBF regulation and baroreflex. An acute increase in arterial blood pressure (ABP) causes cerebral vasodilation in the context of arterial baroreflex control of autonomic activity. By contrast, an acute increase in ABP causes cerebral vasoconstriction to protect the blood–brain barrier via cerebral autoregulation. On the other hand, an acute decrease in ABP causes cerebral vasoconstriction in the context of arterial baroreflex control of autonomic activity, and it causes cerebral vasodilation to washout carbon dioxide (CO2) in the brain via cerebrovascular CO2 reactivity

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