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Neuromodulation of inhibitory control using phase-lagged transcranial alternating current stimulation
Yukyung Kim1, Je-Hyeop Lee1,2, Je-Choon Park1
1Department of Brain and Cognitive Engineering, Korea University, Seoul, 02841, Korea.
Out-of-phase transcranial alternating current stimulation (tACS) improved inhibitory control by speeding reaction times. This non-invasive brain stimulation technique shows promise for enhancing cognitive functions like inhibitory control.
Area of Science:
- Neuroscience
- Cognitive Science
- Neuromodulation
Background:
- Transcranial alternating current stimulation (tACS) is a key non-invasive brain stimulation method.
- It modulates neural oscillations and enhances cognitive functions.
Purpose of the Study:
- Investigate effects of individualized theta tACS on inhibitory control.
- Compare in-phase and out-of-phase stimulation between dACC and lDLPFC.
Main Methods:
- Participants performed a Stroop task with phase-lagged theta tACS.
- Stimulation targeted dACC and lDLPFC using high-density electrode montages.
- Analyzed task performance, event-related potentials, and EEG theta/alpha power.
Main Results:
- Out-of-phase tACS significantly reduced reaction times.
- Observed changes in N1, N2, P1 amplitudes, and late sustained potentials.
- Out-of-phase stimulation increased prestimulus theta and alpha activity.
Conclusions:
- Out-of-phase theta tACS effectively modulates top-down inhibitory control.
- Phase-lagged tACS is feasible for enhancing inhibitory control performance.
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