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| Presentation | 2012-12-17 13:00 Transition from desynchronous to synchronous neural dynamics in cortical network model of spontaneous firing activity Hisashi Kada (Rits), Takahiro Iwamoto (JAIST), Jun-nosuke Teramae (RIKEN), Isao Tokuda (Rits)  NLP2012-88 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Spontaneous brain activity represents internal dynamics of a cortical neural network. Without sensory stimulation, cortical neurons give rise to highly irregular, asynchronous, and low-frequency firing activities. Despite many theoretical models proposed to elucidate the spontaneous activity, the most essential question of how the cortical noise is generated from the internal brain dynamics remained open. Recently, Teramae et al. (2012) proposed a neuronal network model with a log-normal distribution of the excitatory postsynaptic potential (EPSP) and successfully clarified that the existence of a few but significantly strong EPSPs is the key factor for sustaining the irregular low-firing cortical activity. Up to now, the log-normal network model focused mainly on the first order statistics of the network connectivity. This paper introduces bidirectional couplings with correlated EPSPs to the log-normal network model. We show that the correlation gives rise to a group of neurons with significantly high firing frequency, which initiate synchronous firing activity of the cortical neurons. We utilized cross-correlogram (CCG) to characterize the synchronized firing activities. The neurons with high firing frequency are shown to be identified by the eigen-analysis of the connection matrix of the EPSP. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | spontaneous firing activity / matrix of the EPSP / cross-correlogram / high firing frequency / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 363, NLP2012-88, pp. 1-6, Dec. 2012. | |
| Paper # | NLP2012-88 | |
| Date of Issue | 2012-12-10 (NLP) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | NLP2012-88 |
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| Conference Information | |
| Committee | NLP |
| Conference Date | 2012-12-17 - 2012-12-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fukui City Communication Plaza |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General |
| Paper Information | |
| Registration To | NLP |
| Conference Code | 2012-12-NLP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transition from desynchronous to synchronous neural dynamics in cortical network model of spontaneous firing activity |
| Sub Title (in English) | |
| Keyword(1) | spontaneous firing activity |
| Keyword(2) | matrix of the EPSP |
| Keyword(3) | cross-correlogram |
| Keyword(4) | high firing frequency |
| Keyword(5) | |
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| Keyword(8) | |
| 1st Author's Name | Hisashi Kada |
| 1st Author's Affiliation | Ritsumeikan University (Rits) |
| 2nd Author's Name | Takahiro Iwamoto |
| 2nd Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
| 3rd Author's Name | Jun-nosuke Teramae |
| 3rd Author's Affiliation | RIKEN (RIKEN) |
| 4th Author's Name | Isao Tokuda |
| 4th Author's Affiliation | Ritsumeikan University (Rits) |
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| Speaker | Author-1 |
| Date Time | 2012-12-17 13:00:00 |
| Presentation Time | 25 minutes |
| Registration for | NLP |
| Paper # | NLP2012-88 |
| Volume (vol) | vol.112 |
| Number (no) | no.363 |
| Page | pp.1-6 |
| #Pages | 6 |
| Date of Issue | 2012-12-10 (NLP) |
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