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. 2015 Feb 18;9:16. doi: 10.3389/fncom.2015.00016

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Copyright © 2015 Liang, Wang, Sun, Li, Voss, Sleigh, Hagihira and Li.

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) or licensor 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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An EEG recording from a patient undergoing sevoflurane anesthesia and corresponding entropy indices vs. time. (A) Preprocessed EEG recording. (B) Sevoflurane concentration recorded at the mouth (gray line) and the derived end-tidal sevoflurane concentration (black line). (C–J) The time course of the studied EEG derivative. The indices are calculated over a window of 10 s with an overlap of 75%. (K) The time course of MDFA at q = 2 [MDFA(2)] and q = −8 [MDFA(−8)]. The window and overlap selection are similar with entropy measures.