alexa Naming facilitation induced by transcranial direct current stimulation.
Neurology

Neurology

Journal of Neurology & Neurophysiology

Author(s): Fertonani A, Rosini S, Cotelli M, Rossini PM, Miniussi C, Fertonani A, Rosini S, Cotelli M, Rossini PM, Miniussi C

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Abstract Transcranial direct current stimulation (tDCS) is able to generate a long-term increase or decrease in the neuronal excitability that can modulate cognitive tasks, similar to repetitive transcranial magnetic stimulation. The aim of this study was to explore the effects of tDCS on a language task in young healthy subjects. Anodal, cathodal and sham tDCS were applied to the left dorsolateral prefrontal cortex (DLPFC) before two picture naming experiments, a preliminary study (i.e., experiment 1) and a main study (i.e., experiment 2). The results show that anodal tDCS of the left DLPFC improves naming performance, speeding up verbal reaction times after the end of the stimulation, whereas cathodal stimulation had no effect. We hypothesize that the cerebral network dedicated to lexical retrieval processing is facilitated by anodal tDCS to the left DLPFC. Although the mechanisms responsible for facilitation are not yet clear, the results presented herein implicate a facilitation lasting beyond the end of the stimulation that imply cortical plasticity mechanisms. The opportunity to non-invasively interact with the functioning of these plasticity mechanisms will surely open new and promising scenarios in language studies in basic and clinical neuroscience fields. Copyright 2010. Published by Elsevier B.V. This article was published in Behav Brain Res and referenced in Journal of Neurology & Neurophysiology

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