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. 2017 Jun 26;11:49. doi: 10.3389/fnana.2017.00049

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Copyright © 2017 Frenzilli, Ryskalin, Ferrucci, Cantafora, Chelazzi, Giorgi, Lenzi, Scarcelli, Frati, Biagioni, Gambardella, Falleni and Fornai.

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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Loud noise increases Bax in the hippocampus. Representative pictures of hippocampal Bax immunostaining from control (A–C) and noise-exposed (D–I) rats. Pictures at low magnification show hippocampal Bax immunostaining of a control rat (A) and rats sacrificed at 24 h (D) and 7 days (G) after loud noise exposure. Images at a higher magnification show CA3 and CA4 sub-regions from a control rat (B,C, respectively) and rats sacrificed at 24 h (E,F, respectively) and 7 days (H,I, respectively) after loud noise exposure. al, alveus; CA, Cornu Ammonis; DG, dentate gyrus; GCL, granule cell layer; h, hylus; PCL, polymorphic cell layer; SL, stratum lucidum; SLM, stratum lacunosum-moleculare; SO, stratum oriens; SP, stratum pyramidale; SR, stratum radiatum. Bars = (A,D,G) 500 μm; (B,C,E,F,H,I) 89 μm.