Frequency mode excitations in two-dimensional Hindmarsh–Rose neural networks
| Autor: | Alidou Mohamadou, Conrad Bertrand Tabi, Armand Sylvin Etémé |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Statistics and Probability
Physics Work (thermodynamics) Quantitative Biology::Neurons and Cognition Artificial neural network Breather Mode (statistics) Phase (waves) Condensed Matter Physics 01 natural sciences Action (physics) 010305 fluids & plasmas Modulational instability Coupling (physics) 0103 physical sciences Statistical physics 010306 general physics |
| Zdroj: | Physica A: Statistical Mechanics and its Applications. 474:186-198 |
| ISSN: | 0378-4371 |
| DOI: | 10.1016/j.physa.2017.01.075 |
| Popis: | In this work, we explicitly show the existence of two frequency regimes in a two-dimensional Hindmarsh–Rose neural network. Each of the regimes, through the semi-discrete approximation, is shown to be described by a two-dimensional complex Ginzburg–Landau equation. The modulational instability phenomenon for the two regimes is studied, with consideration given to the coupling intensities among neighboring neurons. Analytical solutions are also investigated, along with their propagation in the two frequency regimes. These waves, depending on the coupling strength, are identified as breathers, impulses and trains of soliton-like structures. Although the waves in two regimes appear in some common regions of parameters, some phase differences are noticed and the global dynamics of the system is highly influenced by the values of the coupling terms. For some values of such parameters, the high-frequency regime displays modulated trains of waves, while the low-frequency dynamics keeps the original asymmetric character of action potentials. We argue that in a wide range of pathological situations, strong interactions among neurons can be responsible for some pathological states, including schizophrenia and epilepsy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect