| Presentation | 2021-03-03 Neuronal correlation between the responses to surface and shape in monkey V4 Itsuki Machida, Atsushi Kodama, Ko Sakai, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Integration of multiple properties of an object is a fundamental function of the visual cortex in object recognition. Surface pattern and contour shape are thought to be crucial characteristics that contribute jointly to the recognition. We investigated the integration of surface and shape as well as their corresponding cortical representation in the intermediate-level visual area, V4, of monkeys. To examine whether V4 neurons are responsive to both surface and shape, we examined whether single V4 neurons were responsive to both natural image patches and their silhouette, wherein the former included both contour shape and surface properties, such as texture, color, and specularity, but the latter included only contour shape. Specifically, we analyzed the correlation between the spike counts responding to 105 natural image patches and their silhouette patches. The correlation coefficient across 46 neurons was 0.56 (p<0.001), suggesting the partial joint-coding of surface and shape in single V4 neurons. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | V4 / Vision / Object recognition / Figure-ground segregation / Electrophysiology experiment |
| Paper # | NC2020-42 |
| Date of Issue | 2021-02-24 (NC) |
| Conference Information | |
| Committee | NC / MBE |
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| Conference Date | 2021/3/3(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Neuro Computing, Medical Engineering, etc. |
| Chair | Kazuyuki Samejima(Tamagawa Univ) / Takashi Watanabe(Tohoku Univ.) |
| Vice Chair | Rieko Osu(Waseda Univ.) / Ryuhei Okuno(Setsunan Univ.) |
| Secretary | Rieko Osu(NTT) / Ryuhei Okuno(ATR) |
| Assistant | Ken Takiyama(TUAT) / Nobuhiko Wagatsuma(Toho Univ.) / Akihiro Karashima(Tohoku Inst. of Tech.) / Jun Akazawa(Meiji Univ. of Integrative Medicine) |
| Paper Information | |
| Registration To | Technical Committee on Neurocomputing / Technical Committee on ME and Bio Cybernetics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Neuronal correlation between the responses to surface and shape in monkey V4 |
| Sub Title (in English) | |
| Keyword(1) | V4 |
| Keyword(2) | Vision |
| Keyword(3) | Object recognition |
| Keyword(4) | Figure-ground segregation |
| Keyword(5) | Electrophysiology experiment |
| Keyword(6) | |
| 1st Author's Name | Itsuki Machida |
| 1st Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 2nd Author's Name | Atsushi Kodama |
| 2nd Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| 3rd Author's Name | Ko Sakai |
| 3rd Author's Affiliation | University of Tsukuba(Univ. of Tsukuba) |
| Date | 2021-03-03 |
| Paper # | NC2020-42 |
| Volume (vol) | vol.120 |
| Number (no) | NC-403 |
| Page | pp.pp.7-10(NC), |
| #Pages | 4 |
| Date of Issue | 2021-02-24 (NC) |