Spectral Gini Index for Quantifying the Depth of Consciousness

Figure 3

Example of the relationship between the changes in the EEG signal and various methods during general anesthesia with propofol. (a) EEG signal, (b) plasma concentration of propofol, and (c) spectrogram. (d), (e), (f), (g), (h), (i), and (j) show the SpE: spectral entropy, PE: permutation entropy, AE: approximate entropy, DFA: detrended fluctuation analysis exponent, SFS: SynchFastSlow, SpG: spectral Gini index, and BSpG: binarized spectral Gini index, respectively.

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