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. 2017 Aug 29;7:9722. doi: 10.1038/s41598-017-10539-z

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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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Brain areas showing strengthened coupling with the pre-SMA between motivation levels. In comparison to the task when participants were not motivated, the right pIFG, anterior caudate and pSTS showed strengthened coupling with the pre-SMA in the psychological contrast of SST versus USST when participants were motivated. Activations were thresholded at voxel level p < 0.005 and corrected at cluster level with a FWE p < 0.05. (pIFG = posterior inferior frontal gyrus; AC = anterior caudate; pSTS = posterior superior temporal sulcus.