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. 2018 May 3;8:6958. doi: 10.1038/s41598-018-25198-x

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© The Author(s) 2018

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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(a) Schematic figure showing implantation site of GC microelectrodes array on the left forelimb sensory cortex. Electrical stimulation was applied on the skin of the right wrist. (b) Example of raw ECoG data recorded using GC microelectrode arrays implanted on the forelimb area of rat sensory cortex. (c) Average-SEP response related 5–55 ms after surface electrical stimulation of hand skin with the average-spontaneous activity related to 65–115 ms after stimulation (d) the power spectrum (mean ± standard error) for sensory evoked response and spontaneous activities corresponding to the same signals shown in Fig. 8c.