Phase-shifted tACS can modulate cortical alpha waves in human subjects

In the present study, we investigated traveling waves induced by transcranial alternating current stimulation in the alpha frequency band of healthy subjects. Electroencephalographic data were recorded in 12 healthy subjects before, during, and after phase-shifted stimulation with a device combining...

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Published inCognitive neurodynamics Vol. 18; no. 4; pp. 1575 - 1592
Main Authors Aksenov, Alexandre, Renaud-D’Ambra, Malo, Volpert, Vitaly, Beuter, Anne
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.08.2024
Springer Nature B.V
Springer Verlag
Subjects
Alternating current
Artificial Intelligence
Biochemistry
Biomedical and Life Sciences
Biomedicine
Cognitive Psychology
Cognitive science
Computer Science
EEG
Electric fields
Electrodes
Frequencies
Human subjects
Neurological diseases
Neurosciences
Research Article
Stimulation
Traveling waves
Wave propagation
tACS
Traveling waves
Brain stimulation
EEG
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Summary:In the present study, we investigated traveling waves induced by transcranial alternating current stimulation in the alpha frequency band of healthy subjects. Electroencephalographic data were recorded in 12 healthy subjects before, during, and after phase-shifted stimulation with a device combining both electroencephalographic and stimulation capacities. In addition, we analyzed the results of numerical simulations and compared them to the results of identical analysis on real EEG data. The results of numerical simulations indicate that imposed transcranial alternating current stimulation induces a rotating electric field. The direction of waves induced by stimulation was observed more often during at least 30 s after the end of stimulation, demonstrating the presence of aftereffects of the stimulation. Results suggest that the proposed approach could be used to modulate the interaction between distant areas of the cortex. Non-invasive transcranial alternating current stimulation can be used to facilitate the propagation of circulating waves at a particular frequency and in a controlled direction. The results presented open new opportunities for developing innovative and personalized transcranial alternating current stimulation protocols to treat various neurological disorders.
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ISSN:1871-4080
1871-4099
DOI:10.1007/s11571-023-09997-1