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Appearance and modulation of a reactive temporal-lobe 8–10-Hz tau-rhythm
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| Title: | Appearance and modulation of a reactive temporal-lobe 8–10-Hz tau-rhythm |
| Authors: | Yokosawa, Koichi Browse this author →KAKEN DB | | Murakami, Yui Browse this author | | Sato, Hiroaki Browse this author |
| Keywords: | Rhythm | | Magnetoencephalography | | Auditory response | | Emotion | | Drowsiness |
| Issue Date: | Jan-2020 |
| Publisher: | Elsevier |
| Journal Title: | Neuroscience Research |
| Volume: | 150 |
| Start Page: | 44 |
| End Page: | 50 |
| Publisher DOI: | 10.1016/j.neures.2019.02.002 |
| PMID: | 30768949 |
| Abstract: | Spontaneous 8- to 10-Hz “tau-rhythm” in magnetoencephalographic (MEG) recordings has been reported to originate in the auditory cortex and be suppressed by sound. For unknown reasons however, tau-rhythm is often difficult to detect. In this study, we sought to characterize its emergence and auditory reactivity. Using a 306-channel MEG on 26 right-handed participants, we delivered six-second-long, natural, monaural sounds with pleasant, unpleasant, or neutral emotional valence. In eight participants, a clear, sound-related bilateral suppression of 8–10 Hz tau-rhythm occurred in the temporal areas, close to the source of the 100-ms auditory response. Moreover, these eight “tau subjects” exhibited significantly larger temporal-lobe theta-band (4–8 Hz) power over the entire experimental period compared to the remaining 18 “non-tau subjects”. As it is known that larger theta power is one of signs of drowsiness, this result is consistent with a previously proposed idea that tau-rhythm emerges during drowsiness. Tau-rhythm was furthermore significantly affected by emotional valence in the right hemisphere, where it was respectively suppressed by unpleasant and neutral sounds 8% and 6% more than by pleasant sounds, significantly. Altogether, our results reveal characteristics of tau-rhythm appearance and modulation which have hitherto been difficult to detect non-invasively. |
| Rights: | © <2020>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/91191 |
| Appears in Collections: | 保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 横澤 宏一
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