| Presentation | 2011-07-26 Origin and computational roles of spontaneous noise in cortex Jun-nosuke TERAMAE, Tomoki FUKAI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Even in the absence of sensory stimulation, cortical neurons exhibit highly irregular asynchronous firings in low spiking rate. The spontaneous cortical activity, or noise in cortical circuits, is influential to our perception and also modifiable by sensory experiences, and have been discussed in relation with cortical activities during sleep. However, the underlying mechanisms and computational roles of the intrinsic cortical noise have remained unclear. Here, we will show that low-rate asynchronous firing is stably generated when the weights of excitatory synapses are distributed according to a long-tailed distribution, typically the log-normal distribution. We will also provide possible information processing of cortical neurons inferred from the precise information transmission based on the network structure. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fluctuation / Stochastic resonance / Lognormal distribution / Asynchrony / Sparse coding |
| Paper # | NC2011-37 |
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| Committee | NC |
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| Conference Date | 2011/7/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | Origin and computational roles of spontaneous noise in cortex |
| Sub Title (in English) | |
| Keyword(1) | Fluctuation |
| Keyword(2) | Stochastic resonance |
| Keyword(3) | Lognormal distribution |
| Keyword(4) | Asynchrony |
| Keyword(5) | Sparse coding |
| 1st Author's Name | Jun-nosuke TERAMAE |
| 1st Author's Affiliation | Brain Science Institute, RIKEN:PRESTO, Japan Science and Technology Agency() |
| 2nd Author's Name | Tomoki FUKAI |
| 2nd Author's Affiliation | Brain Science Institute, RIKEN:Graduate School of Frontier Science, The Univ. of Tokyo |
| Date | 2011-07-26 |
| Paper # | NC2011-37 |
| Volume (vol) | vol.111 |
| Number (no) | 157 |
| Page | pp.pp.- |
| #Pages | 4 |
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