2020 Fiscal Year Final Research Report
Reactivation of memory representation by pattern stimulation of the brain
| Project/Area Number |
17H06268
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| Research Category |
Grant-in-Aid for Challenging Research (Pioneering)
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| Allocation Type | Single-year Grants |
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| Research Field |
Brain sciences and related fields
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| Research Institution | Kochi University of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
川嵜 圭祐 新潟大学, 医歯学系, 准教授 (60511178)
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| Project Period (FY) |
2017-06-30 – 2020-03-31
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| Keywords | 視覚再構成 / 錯視 / 一次視覚野 / 皮質脳波 |
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| Outline of Final Research Achievements |
We attempted to reconstruct visual images from visual responses of electrocorticogram (ECoG) in the monkey primary visual cortex (V1). We also examined ECoG responses to the illusory surface perceived by color filling-in using one kind of the illusory images, "the neon color spreading". We are currently conducting the reconstruction of the visual image using a deep neural network. As a result of analyzing the ECoG responses to the illusory surface, we found visual responses to the perception of the illusory surface between 150 ms and 200 ms after the stimulus onset. The spatial extent of the visual response to the illusory surface in V1 was approximately the same as the visual angle of the perceived illusion in the horizontal direction, while it was more expanded in the vertical direction.
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| Free Research Field |
認知神経科学
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| Academic Significance and Societal Importance of the Research Achievements |
現在、サルV1のECoG応答を特徴量として視覚像の再構成を進めている。これが成功すれば、V1における情報のみで視覚像の再構成が可能であることが示され、将来的にはbrain-machine interfaceへの応用が可能となる。
またECoG法を使って初めて色の補填による面の錯視に対するV1の視覚応答を明らかにした。錯視による視覚応答のV1における空間的な広がりは、実際に知覚される錯視の視野角に対して水平方向はほぼ一致していたのに対して、垂直方向にはより広範囲に広がっていた。これはV1内部の、網膜部位再現において垂直な方向の神経結合が色補填に重要な役割を果たすことを示唆するものである。
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