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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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Visual representation of rPWR and rCST for the Right condition. These parameters were computed from the median β-values which were z-scored across channels and then averaged across all participants, for HbO₂ and oxCCO (left) and HHb and oxCCO (right) by rotating of 45° along the haemodynamics and metabolism axis, yielding to a rPWR axis (light blue) and rCST axis (orange). bNIRS channels located in the left hemisphere (# 1–8) are indicated by magenta circles and black crosses indicate channels located in the right hemisphere (# 9–16). The map is divided into four quadrants based on the direction and relative magnitude of the chromophores’ changes (greater increase or decrease) across channels.