Results
75 male and female participants (age: M = 28.96, SD = 6.58) complete the study and were randomly assigned to one of the three treatment conditions in a 1:1:1 ratio: placebo-placebo (PP, No difference in ketamine plasma concentration was found between the PK and LK group (The univariate ANOVAs conducted for rCBF data at the acute time point showed a significant effect of group for the bilateral IFG (Post hoc tests conducted for the bilateral IFG showed that rCBF was stronger in the PK group compared to LK (At the delayed time point, a significant effect of group was observed for the bilateral IFG (