Journal article
Dorsolateral Prefrontal Transcranial Direct Current Stimulation Modulates Language Processing but Does Not Facilitate Overt Second Language Word Production
N Radman, J Britz, K Buetler, BS Weekes, L Spierer, JM Annoni
Frontiers in Neuroscience | FRONTIERS MEDIA SA | Published : 2018
Open access
Abstract
Word retrieval in bilingual speakers partly depends on executive control systems in the left prefrontal cortex – including dorsolateral prefrontal cortex (DLPFC). We tested the hypothesis that DLPFC modulates word production of words specifically in a second language (L2) by measuring the effects of anodal transcranial direct current stimulation (anodal-tDCS) over the DLPFC on picture naming and word translation and on event-related potentials (ERPs) and their sources. Twenty-six bilingual participants with “unbalanced” proficiency in two languages were given 20 min of 1.5 mA anodal or sham tDCS (double-blind stimulation design, counterbalanced stimulation order, 1-week intersession delay). ..
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Funding Acknowledgements
This work was supported by the Swiss National Science Foundation (#325130_156937 to J-MA and #32003B_156854 and #316030_144998 to LS). The STEN toolbox (http://doi.org/10.5281/zenodo.1164038) has been programmed by Jean-Francois Knebel and Michael Notter, from the Laboratory for Investigative Neurophysiology (the LINE), Lausanne, Switzerland, and is supported by the Center for Biomedical Imaging (CIBM) of Geneva and Lausanne and by National Center of Competence in Research project "SYNAPSY - The Synaptic Bases of Mental Disease"; project no. 51AU40_125759. The Cartool software (cartoolcommunity.unige.ch) has been programmed by Denis Brunet, from the Functional Brain Mapping Laboratory (FBMLab), Geneva, Switzerland, and is supported by the Center for Biomedical Imaging (CIBM) of Geneva and Lausanne.