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. 2019 Jun 18;11:144. doi: 10.3389/fnagi.2019.00144

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Copyright © 2019 Ljubisavljevic, Oommen, Filipovic, Bjekic, Szolics and Nagelkerke.

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(s) 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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Experimental design. Serial Seven Subtraction Task (SSST; count backward every 7th number as quickly as possible for 30 s). Grooved Pegboard Task (GPT; insert pegs into holes on the board one by one with the right hand, as quickly as possible for 30 s). Dual-Task (DT; perform both SSST and GPT for 30 s). All tasks (every single-task and dual-task) were performed before, during and 30 min after transcranial direct current stimulation (tDCS). Tasks performed during tDCS were performed 10 min after the onset of stimulation.