2020 Fiscal Year Final Research Report
Functioning of brain network related to conscious color perception
Project/Area Number |
17H00892
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Basic / Social brain science
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Research Institution | Tamagawa University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
一戸 紀孝 国立研究開発法人国立精神・神経医療研究センター, 神経研究所 微細構造研究部, 部長 (00250598)
郷田 直一 生理学研究所, システム脳科学研究領域, 助教 (30373195)
横井 功 生理学研究所, システム脳科学研究領域, 助教 (50592747)
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Project Period (FY) |
2017-04-01 – 2021-03-31
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Keywords | 意識的知覚 / 視知覚 / 下側頭皮質 / 一次視覚野 / 視床枕 |
Outline of Final Research Achievements |
Neuron activities were recorded from the primary visual cortex (V1) of the macaque monkey performing a visual fixation task while stimuli were presented in a metacontrast masking paradigm and in a condition when perceptual filling-in is induced at the blind spot. Both these conditions correspond to those in which dissociation exists between visual stimuli and perception. We also recorded neuron activities in the metacontrast paradigm from the inferior temporal cortex (IT). In the metacontrast, most neurons in both V1 and IT exhibited activities that does not correlate with the backward masking effects observed in perception. In the filling-in paradigm, activities were observed in both deep and superficial layers at the blind spot region in V1 when perceptual filling-in occurs at the blind spot.
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Free Research Field |
視覚神経生理学
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Academic Significance and Societal Importance of the Research Achievements |
視覚刺激と知覚が乖離する時に大脳視覚野でどのような活動が生じるかが明らかになったことで、主観的な視知覚の体験が生じる仕組みについての理解が深まった。充填知覚時に得られた活動は、網膜病変によって生じた暗点において充填知覚が生じることを利用して、網膜病変を生理的に捉える指標として臨床で役立つ可能性がある。大脳視覚野と視床枕核の結合様式の理解が進み、視床枕が意識的知覚に果たす役割を調べる土台が整った。
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