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. 2014 Dec 5;8:398. doi: 10.3389/fnins.2014.00398

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Copyright © 2014 Galow, Schneider, Lewen, Ta, Papageorgiou and Kann.

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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Gamma oscillations and maturation of slice cultures. (A) Slice cultures were stained with toluidine blue after 7, 14, and 21 DIV (left). Gamma oscillations were induced by bath application of acetylcholine (2 μmol/L) and physostigmine (400 nmol/L) and local field potentials (LFP) were recorded in stratum pyramidale of the CA3 subfield (middle). Corresponding power spectra of the sample traces were calculated from data segments of 100 s (right). (B) Gamma oscillations were analyzed for various parameters, i.e., peak frequency (Freq), area under curve (AUC), full width at half maximum (FWHM), peak power spectral density (PSD), amplitude (Ampl) and variance of the amplitude (Var) (7 DIV, n = 12, N = 4; 14 DIV, n = 7, N = 3; 21 DIV, n = 6, N = 3). One-Way ANOVA and Kruskal-Wallis ANOVA on ranks.