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. 2019 Mar 6;9:3667. doi: 10.1038/s41598-019-40277-3

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© The Author(s) 2019

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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t-map and sLORETA contrasts between congruent and incongruent conditions computed in the time period between 538 and 742 ms. (A) Mean ERP mean topographies computed for the congruent (left) and incongruent (right) conditions. Topographies were normalized (GFP = 1). Red and blue indicate positive and negative potential values, respectively. Also shown in the middle is a standard t-map contrasting incongruent and congruent topographies in the same time period. Positive (red) and negative (blue) t-values indicate more positive and more negative potential in the incongruent condition compared to the congruent condition, respectively. (B) Voxel-wise t values comparing the sLORETA source density between the incongruent and congruent condition. Cluster of voxels located in the anterior cingulate cortex (BA 24 and 33) and cingulate gyrus (BA 24 and 32) showed increased activation in the incongruent compared to the congruent condition. All voxels reaching the threshold for p < 0.05 (corrected for multiple comparison, t > 3.66) are color-coded in red.