Figure 4.

Connectivity between C4, approximating the target lesioned M1, and two clusters of electrodes approximating the contralesional frontotemporal cortex and ipsilesional parietal cortex in the alpha frequency band predicted response to anodal tDCS. (Top) A topographic plot of correlation coefficients from the PLS model correlating seed connectivity across whole scalp and tDCS response in alpha band. The seed electrode is shown with a filled white circle. Electrodes identified as being in a cluster approximating the contralesional frontotemporal cortex are marked with black stars. Electrodes identified as being in a cluster approximating the ipsilesional parietal cortex are marked with grey stars. Mean alpha band connectivity between C4 and the contralesional frontotemporal cortex (bottom left), and between C4 and the ipsilesional parietal cortex (bottom right), were individually associated with anodal tDCS response following correction for multiple comparisons [Color figure can be viewed at http://wileyonlinelibrary.com]