| Presentation | 2007-03-14 An estimation method of phase-response curves in neural oscillators and an analysis for their oscillatory stability Masanori ATO, Takashi TATENO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, in the somatosensory cortex, the details of neural connections formed by several types of GABAergic interneurons have become apparent. However, little is known about which role each type of interneurons plays at the local network level. In this study, we focused on investigating roles of one type of interneurons, fast spiking (FS) cells, and their K^+ channels in a regular spiking behavior. To obtain more insight into this from the viewpoint of nonlinear dynamical systems, we recorded membrane-voltage responses (phase resetting curves, PRCs) to small perturbation current during periodic membrane-voltage oscillations for FS interneurons. Then, we applied a recent method from random dynamical system theory to estimate Lyapunov exponents for noisy one-dimensional phase-equations on the circle, to analyze the experimentally-obtained PRCs. The results indicated that Kv3.1-3.2 channel-like current has significant effects on the stability of regular spiking in the interneurons. This work should help to elucidate the mechanism of synchronized oscillations in the complex cortical networks. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | fast-spiking cell / Lyapunov exponents / phase-equation / random dynamical systems |
| Paper # | NC2006-125 |
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| Conference Information | |
| Committee | NC |
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| Conference Date | 2007/3/7(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | An estimation method of phase-response curves in neural oscillators and an analysis for their oscillatory stability |
| Sub Title (in English) | |
| Keyword(1) | fast-spiking cell |
| Keyword(2) | Lyapunov exponents |
| Keyword(3) | phase-equation |
| Keyword(4) | random dynamical systems |
| 1st Author's Name | Masanori ATO |
| 1st Author's Affiliation | Graduate School of Engineering Science, Osaka University() |
| 2nd Author's Name | Takashi TATENO |
| 2nd Author's Affiliation | Graduate School of Engineering Science, Osaka University |
| Date | 2007-03-14 |
| Paper # | NC2006-125 |
| Volume (vol) | vol.106 |
| Number (no) | 588 |
| Page | pp.pp.- |
| #Pages | 6 |
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