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Related Experiment Video

Updated: Jun 19, 2026

Neuronavigated Focalized Transcranial Direct Current Stimulation Administered During Functional Magnetic Resonance Imaging
09:33

Neuronavigated Focalized Transcranial Direct Current Stimulation Administered During Functional Magnetic Resonance Imaging

Published on: November 15, 2024

Naming facilitation induced by transcranial direct current stimulation.

Anna Fertonani1, Sandra Rosini, Maria Cotelli

  • 1Cognitive Neuroscience Section, IRCCS San Giovanni di Dio Fatebenefratelli, Brescia, Italy.

Behavioural Brain Research
|November 4, 2009
PubMed
Summary

Transcranial direct current stimulation (tDCS) enhances language performance by speeding up verbal reaction times. Anodal tDCS applied to the left dorsolateral prefrontal cortex (DLPFC) improved picture naming, suggesting a role in lexical retrieval.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuromodulation

Background:

  • Transcranial direct current stimulation (tDCS) modulates neuronal excitability, impacting cognitive functions.
  • tDCS offers a non-invasive method to influence brain activity, similar to repetitive transcranial magnetic stimulation.
  • Understanding tDCS effects on language processing is crucial for both basic and clinical neuroscience.

Purpose of the Study:

  • To investigate the impact of tDCS on language tasks in healthy young adults.
  • To determine if different tDCS polarities (anodal, cathodal) differentially affect language performance.
  • To explore the potential of tDCS in modulating cognitive functions related to language.

Main Methods:

  • tDCS (anodal, cathodal, sham) was applied to the left dorsolateral prefrontal cortex (DLPFC).
  • Two picture naming experiments were conducted: a preliminary study and a main study.
  • Verbal reaction times were measured to assess naming performance.

Main Results:

  • Anodal tDCS of the left DLPFC significantly improved picture naming performance.
  • Verbal reaction times were faster following anodal tDCS compared to sham stimulation.
  • Cathodal tDCS showed no significant effect on naming performance.

Conclusions:

  • Anodal tDCS to the left DLPFC facilitates lexical retrieval networks involved in language processing.
  • The observed facilitation extends beyond the stimulation period, suggesting induction of cortical plasticity.
  • Non-invasive neuromodulation via tDCS presents promising avenues for language research and therapeutic interventions.