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. 2018 May 25;12:211. doi: 10.3389/fnhum.2018.00211

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Copyright © 2018 Vosskuhl, Strüber and Herrmann.

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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Different forms of non-invasive brain stimulation (NIBS). The left panel depicts a sketch of the respective application. The inlays show the voltage between the electrodes over time. The gray areas depict simplified electric field distributions in which the target area should be located. The right panel represents the stimulation signal (green) relative to EEG (black) from a potential target area. (A) Transcranial direct current stimulation (tDCS) via externally attached electrodes. (B) Transcranial alternating current stimulation (tACS). (C) Transcranial random noise stimulation (tRNS). (D) (Repetetive) transcranial magnetic stimulation (TMS).