Fig. 4.
Group-level spectral analyses comparing dexmedetomidine-induced unconsciousness to propofol-induced unconsciousness (TM [trough-max]) and propofol-induced unconsciousness (PM [peak-max]). (A) Power spectra of dexmedetomidine-induced unconsciousness versus propofol-induced unconsciousness (TM). Electroencephalogram power was larger during propofol-induced unconsciousness (TM) compared with dexmedetomidine-induced unconsciousness at 14.9–40 Hz (P < 0.0005, two-group test spectrum). Electroencephalogram power was larger during dexmedetomidine-induced unconsciousness at 0.7–10 Hz (P < 0.0005, two-group test spectrum). (B) Power spectra of dexmedetomidine-induced unconsciousness versus propofol-induced unconsciousness (PM). Electroencephalogram power was significantly larger than dexmedetomidine-induced unconsciousness at 0.1–40 Hz (P < 0.0005, two-group test spectrum). Median spectra presented with 95% jackknife CIs. Horizontal solid black line(s) represents frequency ranges at which significant difference existed. dB = decibel; Hz = hertz.