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Physiology
As aerial pressure is raised and lowered during the course of a day, blood flow through the brain would be expected to
Change in the same direction as the aerial blood pressure because of the limited autoregulatory ability of the cerebral vessels
Change in a direction opposite the change in mean aerial pressure
Remain constant because cerebral vascular resistance changes in the same direction as aerial pressure
Fluctuate widely, as both aerial pressure and brain neural activity status change
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