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. 2020 Nov 9;10:19319. doi: 10.1038/s41598-020-76356-z

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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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Chronically administered electrically stimulated muscle contractions increase number of new cells in DG and CA1/CA2 subfields of the hippocampus but not in an adjacent region of cortex. (A, B) Representative sections of the DG stained for BrdU from a mouse in the sham and chronic e-stim groups, respectively. (C) Mean total BrdU cell number in the DG shown separately for sham and e-stim groups. (D) Mean volume of the DG. (E, F) Representative sections of the CA1/CA2 region stained for BrdU from a mouse in the sham and chronic e-stim groups, respectively. (G) Mean total BrdU cell number in the CA1/CA2 subfields of the hippocampus shown separately for sham and e-stim groups. (H) Mean volume of CA1/CA2. (I, J) Representative sections of the cortex stained for BrdU from a mouse in the sham and chronic e-stim groups, respectively. (K) Density of BrdU cells in the cortex. Standard error bars shown; n = 17 per bar. *Indicates e-stim group is significantly different from sham (P < 0.05).