Enhanced inhibitory control after out-of-phase theta tACS between the lDLPFC and dACC

It is debatable whether transcranial alternating current stimulation (tACS), administered with specific phase lags across task-relevant regions, would differently manipulate cognitive control performance. This study investigated the effects of individualized theta peak frequency tACS delivered in-ph...

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Main Authors: Kim, Yukyung, Lee, Je-Hyeop, Yun, Sangbin, Yang, Jaewon, Park, Je-Choon, Kwon, Jeongwook, Seo, Jeehye, Min, Byoung-Kyong
Format: Conference Proceeding
Language:English
Subjects:
Brain-computer interfaces
cognitive control
dACC
EEG
Electric potential
Electrodes
Electroencephalography
Frequency control
lDLPFC
tACS
Task analysis
time-frequency analysis
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Summary:It is debatable whether transcranial alternating current stimulation (tACS), administered with specific phase lags across task-relevant regions, would differently manipulate cognitive control performance. This study investigated the effects of individualized theta peak frequency tACS delivered in-phase and out-of-phase between the dorsal anterior cingulate cortex (dACC) and left dorsolateral prefrontal cortex (lDLPFC) on inhibitory control performance. Participants performed a Stroop task while receiving theta tACS over individually optimized high-definition electrode montages targeting the dACC and lDLPFC. Behavioral task performance and response-locked theta-band power in the electroencephalogram (EEG) were analyzed. Our results showed significantly reduced reaction times following out-of-phase tACS, accompanied by increased pre-response theta activity. These findings demonstrate the potential of out-of-phase theta tACS to modulate top-down control, highlighting the feasibility of utilizing phase-dependent tACS for enhancing inhibitory control performance.
ISSN:2572-7672
DOI:10.1109/BCI60775.2024.10480504