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. 2018 Jun 7;8:8736. doi: 10.1038/s41598-018-26568-1

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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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Optogenetic stimulation of the primary visual cortex at 10 Hz does not induce fMRI response in the IC. (a) Atlas (from the Paxinos & Watson) and activation (β) maps for the 10 Hz VC optogenetic stimulation (OG) overlaid on anatomical MRI. Activated voxels detected in the local VC, including pVC and lVC, RS, and ipsilateral SC and AC (n = 9; p < 0.05, corrected for FWE) are shown by the heat map. Abbreviations of atlas overlay are as follows: pVC (primary visual cortex), lVC (lateral visual cortex), RS (retrosplenial cortex), SC (superior colliculus), and AC (auditory cortex). (b) BOLD signal profiles in the significant voxels identified in (a). The results are presented as means ± standard error of the mean. Area in shade indicates the 20 s 10 Hz optogenetic stimulation.