Fig. 1

Cerebral circulation variables by groups. a Cerebral perfusion pressure. b Jugular vein oxygen saturation. c Cerebral blood flow. d Cerebral oxygen delivery. e Cerebral vascular resistance. f Partial pressure of oxygen in brain tissue. Values are mean ± SE. The p values are the results of general linear models with random effects. A p value of < 0.05 was considered significant and marked with *