A method for providing an indication of a state of awareness for a patient, includes the steps of arranging data of an EEG and EMG power spectrogram to provide power versus frequency in a log-log arrangement calculating a first best-fit line for a lower frequency region of the EEG power spectrogram calculating a second best-fit line for a higher frequency region of the EEG power spectrogram calculating a third best-fit line for the EMG power spectrogram and displaying an indication of the state of awareness based on the first, second and third best-fit lines.
