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Frontal tDCS modulates orbitofrontal reality filtering.

A L Manuel1, A W David2, M Bikson2

  • 1Laboratory of Cognitive Neurorehabilitation, Department of Clinical Neurosciences, University of Geneva, Switzerland.

Neuroscience
|February 11, 2014
PubMed
Summary
This summary is machine-generated.

Transcranial direct current stimulation (tDCS) can modulate orbitofrontal reality filtering. Cathodal tDCS over the frontal pole impaired reality filtering in healthy subjects, demonstrating tDCS

Keywords:
confabulationscontinuous recognition taskextinctionorbitofrontal cortextDCS

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuromodulation

Background:

  • Orbitofrontal cortex (OFC) plays a crucial role in reality filtering, a memory control mechanism essential for aligning thought and behavior with reality.
  • Dysfunction in reality filtering can lead to cognitive disturbances such as confabulation and disorientation.

Purpose of the Study:

  • To investigate the effects of transcranial direct current stimulation (tDCS) on the reality filtering function of the orbitofrontal cortex.
  • To determine if polarity-specific stimulation over the frontal pole can modulate reality filtering.

Main Methods:

  • A reality filtering task was administered to 20 healthy participants.
  • Participants received either cathodal, anodal, or sham tDCS over the frontal pole in separate sessions.
  • Computational models were used to predict current flow in the posterior medial OFC.

Main Results:

  • Cathodal tDCS over the frontal pole significantly impaired reality filtering performance compared to anodal and sham stimulation.
  • The findings align with computational predictions of polarity-specific current distribution.

Conclusions:

  • Reality filtering is an orbitofrontal cortex function that can be modulated by tDCS.
  • This study demonstrates the potential of tDCS as a tool for investigating and potentially influencing orbitofrontal cognitive functions.