Mind the stimulation site: Enhancing and diminishing sentence comprehension with anodal tDCS

Alessandra Vergallito, Erica Varoli, Beatrice Giustolisi, Carlo Cecchetto, Lilia Del Mauro, Leonor J. Romero Lauro

Research output: Contribution to journalArticlepeer-review

Abstract

In a previous sham-controlled study, we showed the feasibility of increasing language comprehension in healthy participants by applying anodal transcranial direct current stimulation (atDCS) over the left inferior frontal gyrus (LIFG). In the present work, we present a follow-up experiment targeting with atDCS the left inferior parietal cortex (LIPC) while participants performed the same auditory comprehension task used in our previous experiment. Both neural sites (LIFG and LIPC) are crucial hubs of Baddeley's model of verbal short-term memory (vSTM). AtDCS over LIPC decreased accuracy as compared to sham and LIFG stimulation, suggesting the involvement of this area in sentence comprehension. Crucially, our results highlighted that applying tDCS over different hubs of the same neural network can lead to opposite behavioural results, with relevant implications from a clinical perspective.

Original languageEnglish
Article number104757
JournalBrain and Language
Volume204
DOIs
Publication statusPublished - May 2020

Keywords

  • Language processing
  • Sentence comprehension
  • Syntactic processing
  • tDCS
  • Verbal short-term memory

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Cognitive Neuroscience
  • Speech and Hearing

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