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Chaotic itinerancy as a mechanism of irregular changes between synchronization and desynchronization in a neural network
Title: | Chaotic itinerancy as a mechanism of irregular changes between synchronization and desynchronization in a neural network |
Authors: | Tsuda, Ichiro1 Browse this author →KAKEN DB | Fujii, Hiroshi Browse this author | Tadokoro, Satoru Browse this author | Yasuoka, Takui Browse this author | Yamaguti, Yutaka Browse this author |
Authors(alt): | 津田, 一郎1 |
Keywords: | Gap junction-coupled system | class I* neurons | dynamic cell assembly | chaotic itinerancy | Milnor attractor | metachronal waves | synchronization |
Issue Date: | Jun-2004 |
Publisher: | Imperial College Press |
Journal Title: | Journal of Integrative Neuroscience |
Volume: | 3 |
Issue: | 2 |
Start Page: | 159 |
End Page: | 182 |
Publisher DOI: | 10.1142/S021963520400049X |
Abstract: | We investigate the dynamic character of a network of electrotonically coupled cells consisting of class I point neurons, in terms of a finite dimensional dynamical system. We classify a subclass of class I point neurons, called class I* point neurons. Based on this classification, we use a reduced Hindmarsh-Rose (H-R) model, which consists of two dynamical variables, to construct a network model consisting of electrotonically coupled H-R neurons. Although biologically simple, the system is sufficient to extract the essence of the complex dynamics, which the system may yield under certain physiological conditions. The network model produces a transitory behavior as well as a periodic motion and spatio-temporal chaos. The transitory dynamics that the network model exhibits is shown numerically to be chaotic itinerancy. The transitions appear between various metachronal waves and all-synchronization states. The network model shows that this transitory dynamics can be viewed as a chaotic switch between synchronized and desynchronized states. Despite the use of spatially discrete point neurons as basic elements of the network, the overall dynamics exhibits scale-free activity including various scales of spatio-temporal patterns. |
Description URI: | http://www.worldscinet.com/jin/jin.shtml |
Rights: | Copyright (c) 2004 Imperial College Press. The original publication is available at www.worldscinet.com |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/589 |
Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 津田 一郎
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