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. 2017 Jul 25;7:6461. doi: 10.1038/s41598-017-06340-7

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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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Schematic of fNIRS channel localization. (a) Photograph of fNIRS measurement of a participant. (b) The schematic of the imaging pad (12 sources, red circle and 24 detectors, blue cross). The sources and detectors were symmetrically placed on the left and right hemispheres and constituted 46 measurement channels, which allowed for the most brain regions (i.e., frontal, temporal, parietal, and occipital lobes) on two half-hemispheres to be measured. (c) The anatomical position of each measurement channel.