Fig. 2. Relative changes of regional cerebral metabolic rate of glucose (rcMRGlu) induced by general anesthesia with 1 minimum alveolar concentration xenon or by sedation with subanesthetic concentrations of propofol (target concentration level < 1.0 μg/ml). For comparison, values of global MRGlu are in addition shown. Data are presented as mean ± SD. *P < 0.05, ***  P < 0.005, xenon  versus propofol.