2022 Fiscal Year Final Research Report
Predictive motor signals propagating to others beyond individual brain
Project/Area Number |
20K20860
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 10:Psychology and related fields
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Research Institution | Kyoto University |
Principal Investigator |
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Project Period (FY) |
2020-07-30 – 2023-03-31
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Keywords | 自他分離 / コミュニケーション / 脳波 / 自己主体感 / 遠心性コピー / 事象関連電位 / 感覚減衰 / 運動主体感 |
Outline of Final Research Achievements |
Motor prediction by an efference copy of motor signals has been suggested as a promising candidate for the brain mechanism that realises the recognition of self and others ('self and others segregation'). To investigate the existence of a top-down influence on motor prediction as well as the efference copy, we measured EEG during a sensory attenuation task in which romantic dyads were asked to hold their hands. The results showed that holding hands with a partner showed a sensory attenuation effect, especially in female participants. This suggests the existence of context-dependent top-down signals for motor prediction as well as the efference copy.
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Free Research Field |
認知科学
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Academic Significance and Societal Importance of the Research Achievements |
自他分離を実現する脳メカニズムを研究する際に,感覚減衰パラダイムが頻繁に用いられている.この感覚減衰は運動指令の遠心性コピーにより実現されると考えられているが,二人一組で参加した被験者の個体を超えて感覚減衰が発生するとすれば,単純に遠心性コピーにより感覚減衰が発生するものではないことになる.そこで,より高次の文脈依存的なトップダウン信号によっても運動予測を実現しているかを検証した.このことは,今後,自他分離に関するさらになる研究を実施する際に感覚減衰パラダイムを用いることの正当性に関する知見を提供するものである.
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