Figure 2: Effects of etomidate on CBF. (a) Graph showing the global pattern of changes induced by etomidate, considering cerebral regions from both hemispheres. (b) Graph summarizing the CBF changes by etomidate in regions pertaining to the epileptic hemisphere (black box) and nonepileptic hemisphere (empty box). (c) Ventral view of different brain SPECTs in the same patient, during basal condition (left) and when activated by etomidate (middle). The image on the right corresponds to the substraction of the two previous images. The circle shows the increase in regional CBF in the right posterior mesial area. , z-score test ()., paired Student’s--test ( pairs).