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. 2020 May 22;10:8546. doi: 10.1038/s41598-020-64881-w

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© The Author(s) 2020

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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LFP power changes during the mother-pup separation sessions. From left to right: separation sessions performed during early PP (n = 4, PP3 day), middle PP (n = 4, PP10 day) and late PP (n = 4, PP17 day). Corresponding PP baseline recordings served as baseline (n = 4, PP2 for PP3 separation; n = 4, PP9 for PP10 separation; n = 4, PP16 for PP17 separation; n = 5). Panel A: delta power (1–4 Hz); panel B: theta power (4–10 Hz); panel C: alpha/sigma power (10–16 Hz); panel D: beta power (16–30 Hz); panel E: gamma power (30–48 Hz). Power values are expressed as % of normalized corresponding baseline values and summarized in 2-h long blocks. Averaged baseline values were calculated from the identical rats subjected to the actual treatment in each cases. White and black bars at the X axis represent light- and DPs, respectively. Red asterisks (*) indicate significant deviation from the corresponding baseline value. Significance was tested with two-way ANOVA with time and treatment as factors, followed by Sidak’s multiple comparisons test. Significance levels: * - p < 0.05; ** - p < 0.01; *** - p < 0.001. Data are expressed as mean ± S.E.M.