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Related Experiment Video

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Transcranial Direct Current Stimulation and Simultaneous Functional Magnetic Resonance Imaging
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Prefrontal Multielectrode Transcranial Direct Current Stimulation Modulates Performance and Neural Activity Serving

Yasra Arif1,2, Rachel K Spooner1,2, Alex I Wiesman1,2

  • 1Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA.

Cerebral Cortex (New York, N.Y. : 1991)
|May 12, 2020
PubMed
Summary
This summary is machine-generated.

Stimulating the left dorsolateral prefrontal cortex (DLPFC) impaired visuospatial task performance and altered brain activity more than right DLPFC stimulation. This highlights distinct network effects of left versus right DLPFC modulation.

Keywords:
laterality effectsmagnetoencephalographyneural oscillationsspontaneous activity

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Stimulation

Background:

  • The dorsolateral prefrontal cortex (DLPFC) is crucial for visuospatial attention and processing.
  • The specific roles of the left versus right DLPFC in these functions are not well-defined.

Purpose of the Study:

  • To investigate the impact of stimulating the left and right DLPFC on visuospatial processing.
  • To examine behavioral performance and neural activity changes using multielectrode transcranial direct-current stimulation (ME-tDCS).

Main Methods:

  • Twenty-five healthy adults received ME-tDCS targeting the left DLPFC, right DLPFC, or sham.
  • Participants completed a visuospatial task while undergoing magnetoencephalography (MEG) after stimulation.
  • Neural oscillations and network connectivity were analyzed.

Main Results:

  • Left DLPFC stimulation led to slower reaction times and reduced accuracy compared to right DLPFC stimulation.
  • Left DLPFC stimulation increased theta and decreased gamma oscillations in occipital areas.
  • Connectivity between DLPFC and visual cortices increased contralateral to stimulation.

Conclusions:

  • ME-tDCS can spectrally modulate spontaneous cortical activity and network-level interactions.
  • The laterality of DLPFC stimulation has distinct effects on visuospatial processing and neural activity patterns.