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Updated: May 12, 2026
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Transcranial Direct Current Stimulation and Simultaneous Functional Magnetic Resonance Imaging
Published on: April 27, 2014
Modulating arithmetic fact retrieval: a single-blind, sham-controlled tDCS study with repeated fMRI measurements
Benjamin Clemens1, Stefanie Jung, Mikhail Zvyagintsev
1Neurological Clinic, Section Neuropsychology, RWTH Aachen University, Aachen, Germany. clemens@neuropsych.rwth-aachen.de
Neuropsychologia
|April 23, 2013
Summary
Transcranial direct current stimulation (tDCS) can alter brain activity during arithmetic tasks. This study shows tDCS influences neural correlates of multiplication, offering insights for cognitive rehabilitation.
Area of Science:
- Neuroscience
- Cognitive Science
- Neuromodulation
Background:
- Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique used to modulate cognitive functions.
- Its efficacy in arithmetic tasks and detectable brain activity changes via functional magnetic resonance imaging (fMRI) remain under investigation.
Purpose of the Study:
- To investigate if tDCS can modulate arithmetic task performance and brain activity.
- To examine changes in brain activity using fMRI after a single tDCS session.
Main Methods:
- Healthy participants performed multiplication tasks under three conditions: anodal tDCS over the right angular gyrus (AG), sham tDCS, and control.
- fMRI was used to assess brain activity changes before and after stimulation.
Main Results:
- Behavioral performance in arithmetic tasks was not significantly modulated by a single tDCS session.
- fMRI revealed significant changes in neural activity within the bilateral AG for multiplication problems rehearsed during active tDCS compared to sham or control conditions.
Conclusions:
- This study provides initial neuro-functional evidence that tDCS modulates arithmetic processing.
- Findings suggest potential applications for tDCS in cognitive rehabilitation for individuals with deficits in arithmetic fact retrieval, such as acalculic patients.
