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Transcranial Direct Current Stimulation (tDCS) for Memory Enhancement
Published on: September 18, 2021
Transcranial direct current stimulation improves recognition memory in Alzheimer disease
R Ferrucci1, F Mameli, I Guidi
1Department of Neurological Sciences, University of Milan, Ospedale Maggiore Policlinico, Padiglione Ponti, V F Sforza 35, Milan 20122, Italy.
Neurology
|June 6, 2008
Summary
Anodal transcranial direct current stimulation (tDCS) improved word recognition memory in Alzheimer disease (AD) patients. Cathodal tDCS decreased performance, while sham stimulation had no effect, suggesting targeted tDCS may benefit AD cognitive function.
Area of Science:
- Neuroscience
- Cognitive Neurology
- Neuromodulation
Background:
- Alzheimer disease (AD) is a progressive neurodegenerative disorder characterized by cognitive decline.
- Cognitive impairments in AD significantly impact daily functioning and quality of life.
- Non-invasive brain stimulation techniques are being explored as potential therapeutic interventions for AD.
Observation:
- This study investigated the effects of transcranial direct current stimulation (tDCS) on cognitive functions in patients with probable AD.
- Anodal tDCS (AtDCS), cathodal tDCS (CtDCS), and sham tDCS (StDCS) were applied over temporoparietal areas in 10 AD patients.
- Recognition memory and visual attention were assessed before and after each stimulation condition.
Findings:
- AtDCS significantly enhanced word recognition memory accuracy compared to baseline.
- CtDCS led to a significant decrease in word recognition memory accuracy.
- Neither AtDCS nor CtDCS affected visual attention-reaction times, and StDCS showed no significant changes in either cognitive domain.
Implications:
- Temporoparietal tDCS can specifically modulate recognition memory performance in AD patients.
- The findings suggest that tDCS is a safe, simple, and cost-effective tool for potentially improving cognitive deficits in AD.
- Further research involving repeated tDCS sessions, possibly combined with other therapies, is warranted to explore its therapeutic potential for Alzheimer disease.
