Figure 3.

(a) Visualization of current density pattern for a montage with stimulation electrodes at EEG locations Cz and Oz; (b) source localization of the human alpha generator from a MEG experiment; (c) it was recently shown that properties of the electric field (i.e., the similarity of the electric field and the activation map and the strength of the field) can be used to model the expected effect of an alpha-tACS experiment aiming to increase the amplitude of the alpha activity. Only after active (but not sham) stimulation the model predicted changes in alpha amplitude. Adapted from Ref. [185].