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. 2019 Dec 5;9:18457. doi: 10.1038/s41598-019-54788-6

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Amplitude entropy during wakefulness and sleep. From left to right and top to bottom, the panels show the entropy values calculated from the electro-corticographic (ECoG) histograms coming from the different cortical locations shown in Fig. 1; i.e., olfactory bulb, right and left motorsensory, somatosensory, and visual cortices, respectively. The colour code signals the sleep-wake cycle states (W, blue; NREM, green and REM sleep, red) and the symbols and horizontal lines represent the same as in Fig. 1c. The entropy values were calculated from the ECoG amplitude histograms using $18$ bins. The sampling rate was $1024 H z$ . The statistic is shown in the Supplementary Material (see Table S2).