Fig. 3From: Effect of transcutaneous acupoint electrical stimulation on propofol sedation: an electroencephalogram analysis of patients undergoing pituitary adenomas resectionEffect of TAES on the changes of EEG power induced at different propofol concentrations. a. EEG power spectrum at propofol concentration of 1 μg/mL; b. EEG power spectrum at propofol concentration of 3 μg/mL. In phase two and phase five, TAES were applied. ** p < 0.001 vs the phase one or fourBack to article page