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. 2018 Feb 16;12:72. doi: 10.3389/fnins.2018.00072

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Copyright © 2018 Chaumillon, Blouin and Guillaume.

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) and the copyright owner 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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Waveforms and average results computed over central sites after Laplacian transformation in left-handers. (A) Grand average CSD waveforms recorded over C3 (blue waves) and C4 (red waves) electrodes in the two experimental conditions (LVF or RVF stimulation). Shading blue and red areas represent the SEM across subjects. (B) Individual data and mean IHTT as a function of the DE and the direction of interhemispheric transfer. The statistical analysis revealed a main effect of the factor Direction of interhemispheric transfer indicating a faster interhemispheric transfer from left to right hemisphere (green circles) than from right to left hemisphere (gray circles). Nevertheless, as revealed by the 95% Confidence Intervals reported between brackets, the difference between the two directions was statistically significant only for Left-handers with a left DE. (C) Individual data and mean P100-N160 amplitudes recorded over contralateral (dark blue circles) and ipsilateral (light blue circles) hemispheres to the stimulation. The amplitudes of contralateral and ipsilateral P100-N160 complexes were similar in both left-handers with a left or a right DE. Asterisks show a significant effect (p < 0.05).