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. 2023 May 9;15:1143848. doi: 10.3389/fnagi.2023.1143848

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Copyright © 2023 Shlobin, Aru, Vicente and Zemmar.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Methods to record neurophysiological activity in the dying human brain. (A,B) Standard 10–20 EEG lead placement and coverage of brain areas. (C) Placement of a bispectral index system. Recording patches are placed in the forehead to obtain EEG data and monitor enteral consciousness. Image obtained from Donaldson M, Goodchild JH. Use of bispectral index system (BIS) to Monitor Enteral Conscious (moderate) sedation during general dental procedures. Adapted with permission from Donaldson and Goodchild, Journal of the Canadian Dental Association. 2009 Dec 1; 75 (10). (D) Frequencies of EEG waveforms with corresponding states of consciousness.