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Updated: Mar 6, 2026
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Modulating Cognition Using Transcranial Direct Current Stimulation of the Cerebellum
Published on: February 15, 2015
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Cerebellar Cathodal Transcranial Direct Stimulation and Performance on a Verb Generation Task: A Replication Study.
K Spielmann1, R van der Vliet2, W M E van de Sandt-Koenderman1
1Rijndam Rehabilitation Institute, P.O. Box 23181, 3001 KD Rotterdam, Netherlands; Department of Rehabilitation Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, Netherlands.
Neural Plasticity
|March 14, 2017
Summary
Cerebellar transcranial direct current stimulation (c-tDCS) did not directly improve language tasks. However, cathodal c-tDCS may negatively impact verbal response times and increase variability in later sessions.
Area of Science:
- Neuroscience
- Cognitive Science
- Neuromodulation
Background:
- The cerebellum's role in cognition, particularly language, is under investigation.
- Cerebellar transcranial direct current stimulation (c-tDCS) is a tool to probe these functions.
- Previous research suggested immediate benefits of cathodal c-tDCS on verbal tasks.
Purpose of the Study:
- To replicate findings on cathodal c-tDCS and verbal fluency.
- To investigate potential longer-term effects of cerebellar c-tDCS.
- To assess the impact of c-tDCS on prefrontal-cerebellar language networks.
Main Methods:
- A crossover within-subject design was employed.
- Participants received either cathodal or sham c-tDCS over the right cerebellum.
- Two experimental sessions were conducted with a one-week interval.
Main Results:
- No immediate improvement in verbal response times was observed with cathodal c-tDCS.
- A subgroup receiving cathodal c-tDCS showed reduced performance and increased variability one week later.
- These delayed effects suggest potential negative consequences of cerebellar c-tDCS.
Conclusions:
- Direct effects of cathodal c-tDCS on cerebellar language processing were not confirmed.
- Longer-term negative effects of c-tDCS on verbal fluency are suggested.
- Further research on c-tDCS long-term impacts is crucial before clinical application in aphasia.
