Transcranial Alternating Current and Random Noise Stimulation: Possible Mechanisms

Figure 3

Different montages result in different patterns of current densities. (a) tACS with two 4 × 1 electrode montages (high density, HD) was used in order to achieve a more focal current density. (b) Trying to achieve a similar pattern of current flow with conventional large electrodes results in a more widespread distribution of currents. Reprinted with permission of the authors from [27].

(a)

(b)