| Presentation | 2020-03-05 Sparse STC estimation of suppressive elements for neurons in primary visual cortex Reiji Tanaka, Kota Sasaki, Hirotaka Sakamoto, Yoshihiro Nagano, Yonghao Yue, Masato Okada, Izumi Ohzawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To improve a functional model for visual neurons, we have been developing a novel technique (sparse STC) where a spike-triggered covariance matrix is estimated via LASSO (least absolute shrinkage and selection operator) regression by superposing a small number of basis functions prepared in the Fourier domain. To test this method for neurons in cat primary visual cortex, we analyzed single-unit responses to dynamic 2D noise stimuli. In addition to excitatory filters as the canonical functional models predict, several suppressive filters were discovered via sparse STC, but not via conventional STC, for some cells. These filters appeared to be responsible for cross-orientation suppression or surround suppression. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Primary visual cortex / Spike-triggered covariance / LASSO |
| Paper # | NC2019-102 |
| Date of Issue | 2020-02-26 (NC) |
| Conference Information | |
| Committee | NC / MBE |
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| Conference Date | 2020/3/4(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | University of Electro Communications |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Neuro Computing, Medical Engineering, etc. |
| Chair | Hayaru Shouno(UEC) / Taishin Nomura(Osaka Univ.) |
| Vice Chair | Kazuyuki Samejima(Tamagawa Univ) / Takashi Watanabe(Tohoku Univ.) |
| Secretary | Kazuyuki Samejima(NAIST) / Takashi Watanabe(NTT) |
| Assistant | Takashi Shinozaki(NICT) / Ken Takiyama(TUAT) / Yasuyuki Suzuki(Osaka Univ.) / Akihiro Karashima(Tohoku Inst. of Tech.) |
| 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) | Sparse STC estimation of suppressive elements for neurons in primary visual cortex |
| Sub Title (in English) | |
| Keyword(1) | Primary visual cortex |
| Keyword(2) | Spike-triggered covariance |
| Keyword(3) | LASSO |
| 1st Author's Name | Reiji Tanaka |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Kota Sasaki |
| 2nd Author's Affiliation | Osaka University/National Institute of Information and Communications Technology(Osaka Univ./NICT) |
| 3rd Author's Name | Hirotaka Sakamoto |
| 3rd Author's Affiliation | Tokyo University(Tokyo Univ.) |
| 4th Author's Name | Yoshihiro Nagano |
| 4th Author's Affiliation | Tokyo University(Tokyo Univ.) |
| 5th Author's Name | Yonghao Yue |
| 5th Author's Affiliation | Aoyama Gakuin University(Aoyama Gakuin Univ.) |
| 6th Author's Name | Masato Okada |
| 6th Author's Affiliation | Tokyo University/RIKEN(Tokyo Univ./RIKEN) |
| 7th Author's Name | Izumi Ohzawa |
| 7th Author's Affiliation | Osaka University/National Institute of Information and Communications Technology(Osaka Univ./NICT) |
| Date | 2020-03-05 |
| Paper # | NC2019-102 |
| Volume (vol) | vol.119 |
| Number (no) | NC-453 |
| Page | pp.pp.155-159(NC), |
| #Pages | 5 |
| Date of Issue | 2020-02-26 (NC) |