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. 2019 Feb 28;9:3152. doi: 10.1038/s41598-019-39614-3

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© The Author(s) 2019

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

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Maps of BOLD peak and BOLD area under the curve. Maps of BOLD peak intensity (a) and area under the curve (b) before and after LTP induction. The peak intensity and the area under the curve are averages over four stimulation periods. The red arrows point to regions manifesting a significant increase in the BOLD peak intensity or area under the curve at the radiatum layer of CA1. Zoomed images of the BOLD peak map (c) and the area under the curve map (d) within the ipsilateral hippocampus after LTP induction.