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. 2017 Dec 5;7:17019. doi: 10.1038/s41598-017-16976-0

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© The Author(s) 2017

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) BOLD signals in the left and right visual cortices elicited by hemi-field stimuli, where a 200 ms latency was between them. (B) These BOLD signals were found maximally correlated to each other when the hemodynamic response at the left visual cortex was delayed by 200 ms. Positive time shift indicates the hemodynamic response function at the left visual cortex preceded that at the right visual cortex.