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Modulating Cognition Using Transcranial Direct Current Stimulation of the Cerebellum
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Decreased cerebellar-cerebral connectivity contributes to complex task performance.

Curren Katz1, André Knops2

  • 1Faculty of Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany curren@post.harvard.edu.

Journal of Neurophysiology
|June 24, 2016
PubMed
Summary
This summary is machine-generated.

The cerebellum

Keywords:
arithmeticconnectivityfMRIparietal lobepsycho-physiological interactions

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • The cerebellum's involvement in nonmotor functions is established, yet its interactions with cerebral regions remain unclear.
  • Complex cognitive tasks engage cerebellar, parietal, and frontal networks, but their effective connectivity is not well understood.

Purpose of the Study:

  • To investigate changes in effective connectivity between cerebellar and parietal regions during complex cognitive tasks.
  • To examine how psycho-physiological interactions (PPI) differ between simple and complex multiplication tasks.

Main Methods:

  • Psycho-physiological interactions (PPI) analysis was employed to assess functional connectivity.
  • Connectivity was analyzed using cerebellar and parietal seed regions during simple versus complex multiplication tasks.

Main Results:

  • Complex multiplication led to decreased connectivity between cerebellar regions (lobule VI, hemisphere, vermis) and parietal, cingulate, and frontal areas.
  • Increased parietal-to-parietal and parietal-to-frontal connectivity was observed in complex multiplication tasks.
  • While some parietal regions showed increased BOLD activity, they exhibited decreased cerebellar-parietal PPI connectivity.

Conclusions:

  • Reduced cerebellar-cerebral connectivity appears to play a role in the performance of complex cognitive tasks.
  • Findings highlight the dynamic interplay between cerebellar and cerebral networks during complex cognition.