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. 2020 Feb 4;10:1775. doi: 10.1038/s41598-020-58477-7

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© The Author(s) 2020

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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Relation of lateralization of the IPS and handedness during arithmetic processing. (A) Interaction of hemispheric activation of the IPS with handedness. (B) Lateralization of the IPS in left- and right-handers. (C) Correlation of lateralization in the IPS and degree of handedness. Negative values for LI_brain indicate left-lateralization and positive values for LI_brain indicate right-lateralization. Values for LI_handedness between −100 and −40 indicate left-handedness, between −40 and + 40 mixed-handedness and between + 40 and + 100 right-handedness. Significant effects are marked by stars (*). Error bars depict 1 SE of M.