Method and system for monitoring a level of non-pharmacologically-induced modified state of consciousness

A system for determining and/or monitoring a level of consciousness of a subject receiving a treatment session, the system comprising:

• a monitoring apparatus configured to obtain response data comprising measured data of the subject during the treatment session;
• a controller module configured for receiving measured data from the monitoring apparatus,
• a media renderer configured for presenting the treatment session to the subject for non-pharmacologically modifying the level of consciousness of the subject,
• wherein the monitoring apparatus comprises, for obtaining measured data of the subject during the treatment session, one or more of:
• at least one frontal (F) EEG electrode configured for collection of F-EEG electrode data from a scalp anatomical region corresponding to a frontal lobe of the subject, and
• at least one parietal (P) EEG electrode configured for collection of P-EEG electrode data from a scalp anatomical region corresponding to a parietal lobe of the subject,
• wherein the controller module is configured to determine from the response data, the level of modified consciousness of the subject during the treatment session,
• wherein the system is configured to carry out a method for determining and/or monitoring a level of modified state of consciousness of a subject receiving a treatment session comprising modifying the state of consciousness of the subject non-pharmacologically, the method comprising the steps of:
• receiving response data being a subject's response to the treatment session, wherein the response data comprises measured data comprising electroencephalogram, EEG data, the EEG data comprising data collected from at least one of:
• the at least one frontal (F) EEG electrode configured to be located on the scalp anatomical region corresponding to a frontal lobe of the subject, and
• the at least one parietal (P) EEG electrode configured to be located on the scalp anatomical region corresponding to a parietal lobe of the subject,
• determining from the response data, the level of modified state of consciousness of the subject,
• wherein the EEG data comprises data collected from the at least one F-EEG electrode, and the at least one P-EEG electrode, and the determining comprises:
• extracting from the at least one F-EEG electrode data, a power, F-power, associated with a band in a delta-theta, dt, frequency range;
• and
• extracting from the at least one P-EEG electrode data, a power, P-power, associated with a band in the delta-theta, dt, frequency range;
• wherein the dt frequency range frequencies in a range encompassing both delta and theta brain waves;
• wherein the F-power associated with a band in the dt frequency range and P-power associated with a band in the dt frequency range are indicative of the level of non-pharmacologically modified state of consciousness of the subject;
• and
• wherein a depth of dissociation, DoD, of the subject is determined from the F-power associated with a band in the dt frequency range, and the DoD is used to determine the level of non-pharmacologically modified state of consciousness of the subject.