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. 2021 Feb 17;11:3977. doi: 10.1038/s41598-021-83420-9

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© The Author(s) 2021

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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t-values activation maps resulting from the group-level one sample t-test against zero performed on the rPWR_HbO2 (top) and rPWR_HHb (bottom). t-maps are presented for the Right (right) and Left (left) stimulation conditions. Positive t-values correspond to a positive association between HbO₂/HHb and oxCCO (i.e., channels with a greater increase in HbO₂ and oxCCO/greater decrease in HHb and increase in oxCCO) and negative t-values correspond to a negative association between HbO₂/HHb and oxCCO (i.e., channels with a greater decrease in HbO₂ and oxCCO/greater increase in HHb and decrease in oxCCO). Small shaded circles represent non-significant channels (p > 0.05), solid big circles represent significant channels (p < 0.05), and magenta circles indicate the significant channels (p < 0.05) surviving the FDR correction.