The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination
The parietal operculum (PO) often shows ipsilateral activation during tactile object perception in neuroimaging experiments. However, the relative contribution of the PO to tactile judgment remains unclear. Here, we examined the effect of transcranial direct current stimulation (tDCS) over bilateral...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/88572 http://hdl.handle.net/10220/45829 |
| _version_ | 1826121160337653760 |
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| author | Fujimoto, Shuhei Tanaka, Satoshi Laakso, Ilkka Yamaguchi, Tomofumi Kon, Noriko Nakayama, Takeo Kondo, Kunitsugu Kitada, Ryo |
| author2 | School of Humanities and Social Sciences |
| author_facet | School of Humanities and Social Sciences Fujimoto, Shuhei Tanaka, Satoshi Laakso, Ilkka Yamaguchi, Tomofumi Kon, Noriko Nakayama, Takeo Kondo, Kunitsugu Kitada, Ryo |
| author_sort | Fujimoto, Shuhei |
| collection | NTU |
| description | The parietal operculum (PO) often shows ipsilateral activation during tactile object perception in neuroimaging experiments. However, the relative contribution of the PO to tactile judgment remains unclear. Here, we examined the effect of transcranial direct current stimulation (tDCS) over bilateral PO to test the relative contributions of the ipsilateral PO to tactile object processing. Ten healthy adults participated in this study, which had a double-blind, sham-controlled, cross-over design. Participants discriminated grating orientation during three tDCS and sham conditions. In the dual-hemisphere tDCS conditions, anodal and cathodal electrodes were placed over the left and right PO. In the uni-hemisphere tDCS condition, anodal and cathodal electrodes were applied over the left PO and contralateral orbit, respectively. In the tDCS and sham conditions, we applied 2 mA for 15 min and for 15 s, respectively. Computational models of electric fields (EFs) during tDCS indicated that the strongest electric fields were located in regions in and around the PO. Compared with the sham condition, dual-hemisphere tDCS improved the discrimination threshold of the index finger contralateral to the anodal electrode. Importantly, dual-hemisphere tDCS with the anodal electrode over the left PO yielded a decreased threshold in the right finger compared with the uni-hemisphere tDCS condition. These results suggest that the ipsilateral PO inhibits tactile processing of grating orientation, indicating interhemispheric inhibition (IHI) of the PO. |
| first_indexed | 2024-10-01T05:27:50Z |
| format | Journal Article |
| id | ntu-10356/88572 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:27:50Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/885722020-03-07T12:10:39Z The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination Fujimoto, Shuhei Tanaka, Satoshi Laakso, Ilkka Yamaguchi, Tomofumi Kon, Noriko Nakayama, Takeo Kondo, Kunitsugu Kitada, Ryo School of Humanities and Social Sciences DRNTU::Humanities::General Cortical Plasticity Inter-hemispheric Inhibition (IHI) The parietal operculum (PO) often shows ipsilateral activation during tactile object perception in neuroimaging experiments. However, the relative contribution of the PO to tactile judgment remains unclear. Here, we examined the effect of transcranial direct current stimulation (tDCS) over bilateral PO to test the relative contributions of the ipsilateral PO to tactile object processing. Ten healthy adults participated in this study, which had a double-blind, sham-controlled, cross-over design. Participants discriminated grating orientation during three tDCS and sham conditions. In the dual-hemisphere tDCS conditions, anodal and cathodal electrodes were placed over the left and right PO. In the uni-hemisphere tDCS condition, anodal and cathodal electrodes were applied over the left PO and contralateral orbit, respectively. In the tDCS and sham conditions, we applied 2 mA for 15 min and for 15 s, respectively. Computational models of electric fields (EFs) during tDCS indicated that the strongest electric fields were located in regions in and around the PO. Compared with the sham condition, dual-hemisphere tDCS improved the discrimination threshold of the index finger contralateral to the anodal electrode. Importantly, dual-hemisphere tDCS with the anodal electrode over the left PO yielded a decreased threshold in the right finger compared with the uni-hemisphere tDCS condition. These results suggest that the ipsilateral PO inhibits tactile processing of grating orientation, indicating interhemispheric inhibition (IHI) of the PO. Published version 2018-09-05T05:49:53Z 2019-12-06T17:06:23Z 2018-09-05T05:49:53Z 2019-12-06T17:06:23Z 2017 Journal Article Fujimoto, S., Tanaka, S., Laakso, I., Yamaguchi, T., Kon, N., Nakayama, T., . . . Kitada, R. (2017). The Effect of Dual-Hemisphere Transcranial Direct Current Stimulation Over the Parietal Operculum on Tactile Orientation Discrimination. Frontiers in Behavioral Neuroscience, 11, 173-. doi: 10.3389/fnbeh.2017.00173 https://hdl.handle.net/10356/88572 http://hdl.handle.net/10220/45829 10.3389/fnbeh.2017.00173 en Frontiers in Behavioral Neuroscience © 2017 Fujimoto, Tanaka, Laakso, Yamaguchi, Kon, Nakayama, Kondo and Kitada. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. 11 p. application/pdf |
| spellingShingle | DRNTU::Humanities::General Cortical Plasticity Inter-hemispheric Inhibition (IHI) Fujimoto, Shuhei Tanaka, Satoshi Laakso, Ilkka Yamaguchi, Tomofumi Kon, Noriko Nakayama, Takeo Kondo, Kunitsugu Kitada, Ryo The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title | The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title_full | The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title_fullStr | The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title_full_unstemmed | The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title_short | The effect of dual-hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| title_sort | effect of dual hemisphere transcranial direct current stimulation over the parietal operculum on tactile orientation discrimination |
| topic | DRNTU::Humanities::General Cortical Plasticity Inter-hemispheric Inhibition (IHI) |
| url | https://hdl.handle.net/10356/88572 http://hdl.handle.net/10220/45829 |
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