Modulation of motor learning capacity by transcranial alternating current stimulation.
Author: Sugata H1, Yagi K2, Yazawa S3, Nagase Y4, Tsuruta K3, Ikeda T5, Matsushita K6, Hara M7, Kawakami K8, Kawakami K9
Affiliation:
1Faculty of Welfare and Health Science, Oita University, Oita, Japan. Electronic address: hsugata@oita-u.ac.jp.
2Department of Clinical Laboratory, Junwakai Memorial Hospital, Miyazaki, Japan.
3Department of Neurology, Junwakai Memorial Hospital, Miyazaki, Japan.
4Department of Rehabilitation, Junwakai Memorial Hospital, Miyazaki, Japan.
5Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan.
6Department of Mechanical Engineering, Gifu University, Gifu, Japan.
7Graduate School of Science and Engineering, Saitama University, Saitama, Japan.
8Faculty of Welfare and Health Science, Oita University, Oita, Japan.
9Faculty of Welfare and Health Science, Oita University, Oita, Japan. Electronic address: kkawakami@oita-u.ac.jp.
Conference/Journal: Neuroscience.
Date published: 2018 Sep 19
Other:
Pages: S0306-4522(18)30609-2 , Special Notes: doi: 10.1016/j.neuroscience.2018.09.013. [Epub ahead of print] , Word Count: 221
Motor function can be modulated by transcranial alternating current stimulation (tACS) in alpha, beta, and high-gamma frequencies. However, few studies have investigated tACS-induced behavioral changes in combination with endogenous oscillatory neural activity in detail. Herein, we investigated the effect of tACS on motor learning capacity and endogenous oscillatory neural activity. Fifty-two healthy volunteers were randomly assigned to four stimulation groups (10 Hz, 20 Hz, 70 Hz, or sham) and performed a visually cued button press motor learning task before and after tACS, which was delivered at the left primary motor area. Oscillatory neural activities during the motor learning task were measured using magnetoencephalography (MEG). Following tACS, the capacity for motor learning was significantly increased for 70 Hz tACS compared to sham stimulation. Oscillation analysis revealed a significant increase in beta-band power after 70 Hz tACS but not in the other stimulation groups. Our finding that capacity for motor learning and endogenous oscillatory beta activity were modulated in parallel after 70 Hz tACS suggests that 70 Hz tACS may increase the motor learning capacity by cross-modulating beta oscillatory activity. Because high gamma and beta oscillatory activity have been shown to reflect the activity of excitatory and inhibitory interneuron, our results may derive from the modulation of excitatory and inhibitory interneurons in M1 by 70 Hz tACS.
KEYWORDS: Beta; Cross-frequency modulation; High gamma; Magnetoencephalography; Motor learning; Tacs
PMID: 30244032 DOI: 10.1016/j.neuroscience.2018.09.013
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