fnins-12-00490 July 23, 2018 Time: 15:54 # 1 ORIGINAL RESEARCH published: 25 July 2018 doi: 10.3389/fnins.2018.00490 Dorsolateral Prefrontal Transcranial Direct Current Stimulation Modulates Language Processing but Does Not Facilitate Overt Second Language Word Production Narges Radman1,2*, Juliane Britz1, Karin Buetler3, Brendan S. Weekes4,5, Lucas Spierer1 and Jean-Marie Annoni1 1 Neurology Unit, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland, 2 School of Cognitive Sciences, Institute for Research in Fundamental Sciences, Tehran, Iran, 3 Leenaards Memory Center, Department of Clinical Neuroscience, Lausanne University Hospital, Lausanne, Switzerland, 4 Laboratory for Communication Edited by: Science, Division of Speech and Hearing Sciences, The University of Hong Kong, Pokfulam, Hong Kong, 5 School of Roberto Cecere, Psychological Sciences, Faculty of Dentistry, Medicine and Health Sciences, The University of Melbourne, Melbourne, VIC, University of Glasgow, Australia United Kingdom Reviewed by: Word retrieval in bilingual speakers partly depends on executive control systems in Juha Silvanto, University of Westminster, the left prefrontal cortex – including dorsolateral prefrontal cortex (DLPFC). We tested United Kingdom the hypothesis that DLPFC modulates word production of words specifically in a James Dowsett, Ludwig-Maximilians-Universität second language (L2) by measuring the effects of anodal transcranial direct current München, Germany stimulation (anodal-tDCS) over the DLPFC on picture naming and word translation and *Correspondence: on event-related potentials (ERPs) and their sources. Twenty-six bilingual participants Narges Radman with “unbalanced” proficiency in two languages were given 20 min of 1.5 mA anodal
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[email protected] or sham tDCS (double-blind stimulation design, counterbalanced stimulation order, 1- week intersession delay).