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Related Experiment Video

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Modulating Cognition Using Transcranial Direct Current Stimulation of the Cerebellum
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Decreasing propensity to mind-wander with transcranial direct current stimulation.

Shogo Kajimura1, Michio Nomura1

  • 1Department of Cognitive Psychology in Education, Graduate School of Education, Kyoto University, Kyoto, Japan.

Neuropsychologia
|July 18, 2015
PubMed
Summary

This study shows transcranial direct current stimulation (tDCS) can decrease mind wandering. By stimulating specific brain regions, researchers found a reduction in task-unrelated thoughts (TUTs), offering new ways to regulate attention.

Keywords:
Default mode networkPerceptual load taskRight inferior parietal lobuleTask-unrelated thoughtsTranscranial direct current stimulation

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Area of Science:

  • Cognitive Neuroscience
  • Neurostimulation

Background:

  • Mind wandering, or task-unrelated thought (TUT), has varied implications, necessitating effective regulation strategies.
  • Previous research indicated transcranial direct current stimulation (tDCS) could increase TUT propensity, but its capacity to decrease TUTs remained unexplored.

Purpose of the Study:

  • To investigate if simultaneous tDCS of the left lateral prefrontal cortex (LPFC) and right inferior parietal lobule (IPL) could modulate TUTs.
  • To explore the potential of tDCS to decrease, rather than increase, the propensity for mind wandering.

Main Methods:

  • Participants underwent tDCS targeting the right IPL and left LPFC before performing a demanding flanker task.
  • The propensity for TUTs was assessed and compared across different tDCS stimulation conditions (anodal/cathodal and sham).

Main Results:

  • Anodal/cathodal tDCS of the right IPL/left LPFC significantly reduced TUT propensity compared to cathodal/anodal stimulation.
  • The sham stimulation group showed intermediate levels of TUT propensity between the two active stimulation groups.

Conclusions:

  • This study provides the first evidence that tDCS can be used to decrease TUT propensity.
  • Targeted tDCS of the right IPL and left LPFC offers a novel method for modulating mind wandering and potentially enhancing attentional control.