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. 2015 Feb 26;9:106. doi: 10.3389/fnhum.2015.00106

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Copyright © 2015 Okazaki, Takahashi, Ueno, Takahashi, Ishitobi, Kikuchi, Higashima and Wada.

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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Results of multiscale entropy (MSE) analysis (upper panel) and power spectrum analysis (lower panel) conducted before electroconvulsive therapy (ECT), during ECT, after ECT, and during treatment with lorazepam. Each panel shows averaged MSE and power spectrum results from each condition. A decrease in sample entropy (SampEn) was observed with ECT at lower scale factors (SFs) 1–5 (highlighted with light pink shaded area). By contrast, increased SampEn was observed at higher SFs 31–40 (light blue shaded area).