| Presentation | 2002/11/4 Effect of Synaptic Background Activity on the Responsiveness of Neocortical Model Neurons Shinsuke KOYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the neocortex. each cell undergoes a continuous bombardment due to synaptic activity, which acts as a mejor source of noise. Here, we investigate effects of synaptic background activity on the responsiveness of neocortical model neurons. We first carry out numerical simulations by using the single compartment model with Hodgkin-Huxley type voltage-gate current. In this simulation, synaptic background activity and excitatory synchronized synaptic input are added for noise and signal respectively. We show that there is an optimal amplitude of voltage-fluctuation at which response probability takes its maximum. We next analyze this phenomenon by means of the Leaky Integrate-and-Fire model. We show that synaptic background activity leads to a qualitative change in the membrane potential distibution and results with the stochastic resonance. Finally, ensemble of neuron is considered, and we show that mutual information between input and output increases due to the background noise. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Synaptic background activity / Neocortical model nerurns / Leaky integrate-and-fire model |
| Paper # | NC2002-66 |
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| Conference Information | |
| Committee | NC |
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| Conference Date | 2002/11/4(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) | Effect of Synaptic Background Activity on the Responsiveness of Neocortical Model Neurons |
| Sub Title (in English) | |
| Keyword(1) | Synaptic background activity |
| Keyword(2) | Neocortical model nerurns |
| Keyword(3) | Leaky integrate-and-fire model |
| 1st Author's Name | Shinsuke KOYAMA |
| 1st Author's Affiliation | Graduate School of Engineering, Hokkaido University() |
| Date | 2002/11/4 |
| Paper # | NC2002-66 |
| Volume (vol) | vol.102 |
| Number (no) | 430 |
| Page | pp.pp.- |
| #Pages | 6 |
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