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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Electroencephalographic dynamics of etomidate‐induced loss of consciousness

Fig. 3

Frontal-lobe EEG spectrograms in the study of etomidate-induced LOC. a In the etomidate study, the main events are marked on the timeline. b During the study, each patient was instructed to keep their eyes closed and without motion for a period of 3 min before etomidate was administered to induce general anesthesia. The frequency is plotted on the y-axis and time is plotted on the x-axis. The energy or power in the signal is represented by color. As the induction of etomidate began, the slow-wave, delta-wave, and theta-wave oscillations increased. After LOC, the alpha wave oscillation increased

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