| Presentation | 2003/5/2 Brain activities in the human visual areas while viewing illusory contours : An fMRI study Kiyohiro MAEDA, Masaki FUKUNAGA, Asuka NAKAGOSHI, Hiroki YAMAMOTO, Kenichiro YAMAMOTO, Chuzo TANAKA, Toshihiko EBISU, Masahiro UMEDA, Yoshimichi EJIMA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The Kanizsa figure yields illusory contours that bridge gaps between precisely aligned luminance edges of the inducers (packmans). Using fMRI, we investigated cortical processing of the Kanizsa-type illusory contours in human visual areas. By changing orientations of the packmans, we controlled the percept of the illusory contours which appeared only while the luminance edges of the packmans were aligned. Through the experiment, there was no local modulation of luminance in the stimulus. The distribution of brain activities evoked by illusory contours were quite similar to that evoked by the real contours: there were robust activations in the striate cortex as well as extrastriate cortex. Surprisingly, the involvement of striate cortex was also observed for inducers which yields little or no illusory contour. We discussed the results in terms of retinotopy, and cortical formation of contours and figures. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | vision / illusory contour / fMRI / visual areas |
| Paper # | HIP2003-3 |
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| Conference Information | |
| Committee | HIP |
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| Conference Date | 2003/5/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Human Information Processing (HIP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Brain activities in the human visual areas while viewing illusory contours : An fMRI study |
| Sub Title (in English) | |
| Keyword(1) | vision |
| Keyword(2) | illusory contour |
| Keyword(3) | fMRI |
| Keyword(4) | visual areas |
| 1st Author's Name | Kiyohiro MAEDA |
| 1st Author's Affiliation | Graduate School of Human and Environmental Studies, Kyoto University() |
| 2nd Author's Name | Masaki FUKUNAGA |
| 2nd Author's Affiliation | Faculty of Medical Informatics, Meiji University of Oriental Medicine |
| 3rd Author's Name | Asuka NAKAGOSHI |
| 3rd Author's Affiliation | Faculty of Medical Informatics, Meiji University of Oriental Medicine |
| 4th Author's Name | Hiroki YAMAMOTO |
| 4th Author's Affiliation | Graduate School of Human and Environmental Studies, Kyoto University |
| 5th Author's Name | Kenichiro YAMAMOTO |
| 5th Author's Affiliation | Graduate School of Human and Environmental Studies, Kyoto University |
| 6th Author's Name | Chuzo TANAKA |
| 6th Author's Affiliation | / |
| 7th Author's Name | Toshihiko EBISU |
| 7th Author's Affiliation | Faculty of Medical Informatics, Meiji University of Oriental Medicine |
| 8th Author's Name | Masahiro UMEDA |
| 8th Author's Affiliation | Graduate School of Human and Environmental Studies, Kyoto University |
| 9th Author's Name | Yoshimichi EJIMA |
| 9th Author's Affiliation | |
| Date | 2003/5/2 |
| Paper # | HIP2003-3 |
| Volume (vol) | vol.103 |
| Number (no) | 39 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |