STOCHASTIC DYNAMICS OF ELECTRORECEPTORS IN PADDLEFISH
| Autor: | David F. Russell, Alexander Neiman |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Quantitative Biology::Neurons and Cognition Electroreception biology General Mathematics General Physics and Astronomy Sensory system biology.organism_classification Noise (electronics) Synchronization Bursting symbols.namesake Stochastic dynamics Control theory Gaussian noise Paddlefish symbols Neuroscience |
| Zdroj: | Fluctuation and Noise Letters. :L139-L149 |
| ISSN: | 1793-6780 0219-4775 |
| DOI: | 10.1142/s0219477504001744 |
| Popis: | Electroreceptors in paddlefish serve as accessible and well-defined biological models for studying the functional roles in sensory nervous systems of noisy oscillations and the nonlinear phenomena associated with them, including synchronization, noise-induced transitions, and noise-induced bursting. The spontaneous dynamics of paddlefish electroreceptors show two oscillatory modes: one associated with 26 Hz oscillations in the sensory epithelia, and another with 30-65 Hz periodicities of afferent terminals. This novel type of organization of peripheral sensory receptors, with two distinct types of embedded oscillators, results in stochastic biperiodic firing patterns of primary afferents. The biperiodicity can be explained qualitatively in terms of a simple model based on a stochastic circle map. Stimulation with broadband Gaussian noise changes the tonic firing pattern of electroreceptors to a bursting mode, indicating a noise-induced transition. This qualitative change in dynamics leads to burst synchronization among different electroreceptors. |
| Databáze: | OpenAIRE |
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