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. 2013 Dec 12;7:857. doi: 10.3389/fnhum.2013.00857

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Copyright © 2013 Stagg and Johansen-Berg.

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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(A) Regions of increased motor-related activation after anodal stimulation applied to the ipsilesional M1 compared with sham. The column graph (top right) shows the mean change in activity within these regions. (B) Regions of increased motor-related activation after cathodal stimulation applied to the contralesional M1 compared with sham. The column graph (center right) shows the mean change in activity within these regions. (C) Regions of increased motor-related activation after M1_Ipsi anodal tDCS (blue), M1_Cont Cathodal tDCS (yellow), and regions where these two effects overlap (green). (D) Regions of significant correlation between the change in motor-related fMRI signal due to M1_Ipsi anodal tDCS and the tDCS-induced change in reaction times. M1, primary motor cortex; SMA, supplementary motor area; PMd, dorsal premotor cortex. Reprinted with permission from Figure 3, Stagg et al. (2012).