Improving working memory by electrical stimulation and cross-frequency coupling.
Electroencephalography (EEG)
Power spectral density (PSD)
Theta-gamma peak-coupled transcranial alternating current stimulation
Transcranial alternating current stimulation (tACS)
Working memory (WM)
Journal
Molecular brain
ISSN: 1756-6606
Titre abrégé: Mol Brain
Pays: England
ID NLM: 101468876
Informations de publication
Date de publication:
01 Oct 2024
01 Oct 2024
Historique:
received:
27
07
2024
accepted:
12
09
2024
medline:
2
10
2024
pubmed:
2
10
2024
entrez:
1
10
2024
Statut:
epublish
Résumé
Working memory (WM) is essential for the temporary storage and processing of information required for complex cognitive tasks and relies on neuronal theta and gamma oscillations. Given the limited capacity of WM, researchers have investigated various methods to improve it, including transcranial alternating current stimulation (tACS), which modulates brain activity at specific frequencies. One particularly promising approach is theta-gamma peak-coupled-tACS (TGCp-tACS), which simulates the natural interaction between theta and gamma oscillations that occurs during cognitive control in the brain. The aim of this study was to improve WM in healthy young adults with TGCp-tACS, focusing on both behavioral and neurophysiological outcomes. Thirty-one participants completed five WM tasks under both sham and verum stimulation conditions. Electroencephalography (EEG) recordings before and after stimulation showed that TGCp-tACS increased power spectral density (PSD) in the high-gamma region at the stimulation site, while PSD decreased in the theta and delta regions throughout the cortex. From a behavioral perspective, although no significant changes were observed in most tasks, there was a significant improvement in accuracy in the 14-item Sternberg task, indicating an improvement in phonological WM. In conclusion, TGCp-tACS has the potential to promote and improve the phonological component of WM. To fully realize the cognitive benefits, further research is needed to refine the stimulation parameters and account for individual differences, such as baseline cognitive status and hormonal factors.
Identifiants
pubmed: 39354549
doi: 10.1186/s13041-024-01142-1
pii: 10.1186/s13041-024-01142-1
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
72Informations de copyright
© 2024. The Author(s).
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