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. 2020 Jul 14;14:646. doi: 10.3389/fnins.2020.00646

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Copyright © 2020 Ma, Fu, Cao, Shao, Song, Sheng, Yang, Cui, Chen, Zhao, Luo, Lai and Zheng.

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) and the copyright owner(s) 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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The projection from the CA1 of dorsal and ventral hippocampus to the BLA in mice. (A) Left panel: diagram of the injection site of BDA in the CA1 of dorsal hippocampus. Middle panel: the typical injection site of BDA (red-colored) in the dorsal CA1 of the hippocampus in mice of control group. Bar = 500 μm. Right panel: the BDA-positive fibers (red-colored) in the BLA from the CA1 of dorsal hippocampus on seventh day after BDA injection. Bar = 100 μm. (B) Left panel: diagram of the injection site of BDA in the CA1 of dorsal hippocampus. Middle panel: the typical injection site of BDA (red-colored) in the CA1 of dorsal hippocampus in mice with conditioned place aversion. Bar = 500 μm. Right panel: the BDA-positive fibers (red-colored) in the BLA from the CA1 of dorsal hippocampus on seventh day after BDA injection. Bar = 100 μm. (C) Left panel: diagram of the injection site of BDA in the CA1 of ventral hippocampus. Middle panel: the typical injection site of BDA (red-colored) in the CA1 of ventral hippocampus in mice of control group. Bar = 500 μm. Right panel: the BDA-positive fibers (red-colored) in the BLA from the CA1 of ventral hippocampus on seventh day after BDA injection. Bar = 100 μm.