2011 Fiscal Year Final Research Report
Integration and separation of visual information in the human visual cortex.
| Project/Area Number |
21330165
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Experimental psychology
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| Research Institution | Tohoku University |
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Principal Investigator |
KURIKI Ichiro 東北大学, 電気通信研究所, 准教授 (80282838)
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| Co-Investigator(Kenkyū-buntansha) |
SHIOIRI Satoshi 東北大学, 電気通信研究所, 教授 (70226091)
MATSUMIYA Kazumichi 東北大学, 電気通信研究所, 助教 (90395103)
TOKUNAGA Rumi 東北大学, 電気通信研究所, 助教 (80573914)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 脳内表現 / 視覚情報処理 / 色覚 / 運動視 / 機能的MRI |
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| Research Abstract |
We investigated how elements of visual information are separated and integrated in the human visual cortex, by classifying brain activity in relation to visual stimuli. It has been clarified that color signals are encoded in the brain not as the combination of cone-opponent signals, and it was demonstrated the presence of neurons selective to each hue in no less than eight hue directions. For the combination of color and motion signal in the brain with strong relation to the human visual percept, we have found that brain activities recorded in several lower-level visual cortex and a higher level cortex could have been classified into the classes correspond to the subjective report. For the combination of form and color the orientation of a short line element, which is the elementary signal of shape at the lower level of visual cortex, and color information are linked tightly across wide area of visual cortex. In summary, our results suggest that some elements of visual information are tightly linked throughout the visual cortex, and some others are linked at a localized area in the human visual cortex. Also, it was suggested that feed forward and feed back signals must be dissociated in the future study on this topic.
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