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Probing EEG activity in the targeted cortex after focal transcranial electrical stimulation

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BACKGROUND: Recording electroencephalography (EEG) from the targeted cortex immediately before and after focal transcranial electrical stimulation (TES) remains a challenge.

METHODS: We introduce a hybrid stimulation-recording approach where a single EEG electrode is inserted into the inner electrode of a double-ring montage for focal TES. The new combined electrode was placed at the C3 position of the EEG 10-20 system. Neuronal activity was recorded in two volunteers before and after 20 Hz alternating-current TES at peak-to-peak intensities of 1 and 2 mA. TES-induced electric field distributions were simulated with SIMNIBS software.

RESULTS: Using the hybrid stimulation-recording set-up, EEG activity was successfully recorded directly before and after TES. Simulations revealed comparable electrical fields in the stimulated cortex for the pseudomonopolar montage with and without embedded EEG electrode.

CONCLUSION: The hybrid TES-EEG approach can be used to probe after-effects of focal TES on neuronal activity in the targeted cortex.

Original languageEnglish
JournalBrain Stimulation
Volume13
Issue number3
Pages (from-to)815-818
Number of pages4
ISSN1935-861X
DOIs
Publication statusPublished - 1 May 2020

    Research areas

  • Electrical field simulation, Electroencephalography, Transcranial alternating current stimulation, Transcranial electrical stimulation

ID: 59663711