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. 2015 Sep 24;9:506. doi: 10.3389/fnhum.2015.00506

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Copyright © 2015 Klöppel, Lauer, Peter, Minkova, Nissen, Normann, Reis, Mainberger, Bach and Lahr.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Averaged VEP before (solid line) and after stimulation with checkerboard reversals (dashed line) across all participants. Note that the y-axis represents arbitrary units as VEP amplitude is normalized. Error shades indicate ±1 SEM.