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Beta-frequency EEG activity increased during transcranial direct current stimulation

Song, Myeongseop and Shin, Yungjae and Yun, Kyongsik (2014) Beta-frequency EEG activity increased during transcranial direct current stimulation. Neuroreport, 25 (18). pp. 1433-1436. ISSN 0959-4965. doi:10.1097/WNR.0000000000000283.

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Transcranial direct current stimulation (tDCS) is a technique for noninvasively stimulating specific cortical regions of the brain with small (<2 mA) and constant direct current on the scalp. tDCS has been widely applied, not only for medical treatment, but also for cognitive and somatosensory function enhancement, motor learning improvement, and social behavioral change. However, the mechanism that underlies the effect of tDCS is unclear. In this study, we performed simultaneous electroencephalogram (EEG) monitoring during tDCS to understand the dynamic electrophysiological changes throughout the stimulation. A total of 10 healthy individuals participated in this experiment. We recorded EEGs with direct current stimulation, as well as during a 5-min resting state before and after the stimulation. All participants kept their eyes closed during the experiment. Anode and cathode patches of tDCS were placed on the left and the right dorsolateral prefrontal cortex, respectively. In addition, an EEG electrode was placed on the medial prefrontal cortex. The beta-frequency power increased promptly after starting the stimulation. The significant beta-power increase was maintained during the stimulation. Other frequency bands did not show any significant changes. The results indicate that tDCS of the left dorsolateral prefrontal cortex changed the brain to a ready state for efficient cognitive functioning by increasing the beta-frequency power. This is the first attempt to simultaneously stimulate the cortex and record the EEG and then systematically analyze the prestimulation, during-stimulation, and poststimulation EEG data.

Item Type:Article
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URLURL TypeDescription DOIArticle
Yun, Kyongsik0000-0002-6103-7187
Additional Information:© 2014 Lippincott Williams & Wilkins. Received 1 September 2014 accepted 23 September 2014. This study was supported by Research-Oriented Startup Grant, Small and Medium Business Administration (SMBA), Korea, and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2013R1A6A3A03020772). Conflicts of interest: There are no conflicts of interest.
Funding AgencyGrant Number
Small and Medium Business Administration (Korea)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Ministry of Education (Korea)2013R1A6A3A03020772
Subject Keywords:electroencephalogram; resting state; transcranial direct current stimulation
Issue or Number:18
Record Number:CaltechAUTHORS:20141219-103037433
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53036
Deposited By: Tony Diaz
Deposited On:19 Dec 2014 18:55
Last Modified:10 Nov 2021 19:47

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