Collective Dynamics of Excitable System in Heterogeneous Media

Author

Di, Zengru ; Wang, Dahui ; Cao, Zhoujian ; Qu, Zhilin

Author_Institution

Dept. of Syst. Sci., Beijing Normal Univ.

Volume

3

fYear

2005

Firstpage

1900

Lastpage

1905

Abstract

The collective behaviors of excitable system in heterogeneous media are discussed. Due to the heterogeneity on diffusion and other properties of media, the spiral wave would drift over the media and its stability is also be affected. The drift behaviors are different for dense and sparse waves because their different core properties. Moreover we have found that spatial inhomogeneities on diffusion could destabilize the spiral wave. It would cause stable spiral wave meandering or even breakup. Several cases have been investigated including the effects of heterogeneity caused by fiber rotation in cardiac tissue. The meaning of these results for neuro-dynamics in brain and cognitive behavior is discussed

Keywords

biodiffusion; biological tissues; brain; cognition; neural nets; stability; waves; brain; cardiac tissue; cognitive behavior; collective dynamics; excitable system; heterogeneous media; neuro-dynamics; sparse waves; spiral wave; stability; Biological systems; Calcium; Cardiac tissue; Cardiology; Chemical processes; Heart; Nonhomogeneous media; Physics; Spirals; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Neural Networks and Brain, 2005. ICNN&B '05. International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-9422-4

Type

conf

DOI

10.1109/ICNNB.2005.1614996

Filename

1614996