| Presentation | 2004/3/12 Cortical representation learning regulated by acetylcholine Junichiro HIRAYAMA, Junichiro YOSHIMOTO, Shin ISHII, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A brain needs to detect an environmental change and to quickly learn internal representations necessary in a new environment. This report presents a theoretical model of cortical representational learning that can adapt to dynamic environments, incorporating the results by previous studies on a functional role of acetylcholine (ACh). We adopt the probabilistic principal component analysis (PPCA) as a functional model of cortical representational learning, and present an on-line learning method for PPCA according to Bayesian inference. Our approach is examined in two types of simulations with synthesized and realistic datasets, in which our model is able to re-learn new representation bases after environmental changes. We suggest that the function of ACh corresponds to the learning rate in our learning model and describe both biological and computational studies related to our model. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | neuromodulation / acetylcholine / learning rate / internal representation / on-line variational Bayes method |
| Paper # | NC2003-210 |
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| Committee | NC |
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| Conference Date | 2004/3/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Neurocomputing (NC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Cortical representation learning regulated by acetylcholine |
| Sub Title (in English) | |
| Keyword(1) | neuromodulation |
| Keyword(2) | acetylcholine |
| Keyword(3) | learning rate |
| Keyword(4) | internal representation |
| Keyword(5) | on-line variational Bayes method |
| 1st Author's Name | Junichiro HIRAYAMA |
| 1st Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology() |
| 2nd Author's Name | Junichiro YOSHIMOTO |
| 2nd Author's Affiliation | CREST, Japan Science and Technology Agency |
| 3rd Author's Name | Shin ISHII |
| 3rd Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology |
| Date | 2004/3/12 |
| Paper # | NC2003-210 |
| Volume (vol) | vol.103 |
| Number (no) | 734 |
| Page | pp.pp.- |
| #Pages | 6 |
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