Chaotic bursting as chaotic itinerancy in coupled neural oscillators |
| |
Authors: | Han Seung Kee Postnov D E |
| |
Institution: | Department of Physics and BSRC, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea. |
| |
Abstract: | We show that chaotic bursting activity observed in coupled neural oscillators is a kind of chaotic itinerancy. In neuronal systems with phase deformation along the trajectory, diffusive coupling induces a dephasing effect. Because of this effect, an antiphase synchronized solution is stable for weak coupling, while an in-phase solution is stable for very strong coupling. For intermediate coupling, a chaotic bursting activity is generated. It is a mixture of three different states: an antiphase firing state, an in-phase firing state, and a nonfiring resting state. As we construct numerically the deformed torus manifold underlying the chaotic bursting state, it is shown that the three unstable states are connected to give rise to a global chaotic itinerancy structure. Thus we claim that chaotic itinerancy provides an alternative route to chaos via torus breakdown. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|