Fig. 2

Effect of propofol concentration on the EEG power at different frequency bands. a. The EEG power spectrum at each frequency band. b. Topoplot of EEG power at each frequency band. Phase 0: before propofol infusion, phase 1: 1 μg/mL propofol, phase 4: 3 μg/mL propofol. Data were color-coded and plotted at the corresponding position on the scalp. ^** p < 0.001, and ^* p < 0.05 vs the phase 0