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. 2017 Jun 7;11:40. doi: 10.3389/fncir.2017.00040

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Copyright © 2017 Lee, Huh, Lee, Ghim, Lee and Jung.

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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Recording locations and unit classification. (A) Single units were recorded first from CA1 and then CA3/DG regions of the rat dorsal hippocampus. Red dots indicate the final recording locations of all tetrodes. Modified from Paxinos and Watson (1998) with permission. (B) Unit classification. The recorded units were classified into putative pyramidal cells and putative interneurons based on mean discharge rates and the distribution of inter-spike intervals. Those units with mean discharge rates <5 Hz and the burst index (the percentage of inter-spike intervals shorter than one-fourth of each neuron's mean inter-spike interval) >45% were classified as putative pyramidal cells and the rest were classified as putative interneurons.