Title :
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.
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;
Conference_Titel :
Neural Networks and Brain, 2005. ICNN&B '05. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9422-4
DOI :
10.1109/ICNNB.2005.1614996
