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. 2020 Apr 21;10(4):246. doi: 10.3390/brainsci10040246

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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High-definition transcranial direct current stimulation (HD-tDCS) electrode placement and electrical current flow model. (A) The experimental setup for HD-tDCS. (B) Placement of 4 × 1 HD-tDCS electrodes. The anodal electrode was placed over the Cz electrode of a 10/20 electroencephalogram (EEG) system and surrounded by four cathodal electrodes i.e., C3, C4, Fz, and Pz. (C) Electrical current flow model of the cortical surface (left), and the cortical cross-section (right). The electrical field influenced the lower limb area of the sensorimotor regions (red circle).