Noise effects on spike propagation during the refractory period in the FitzHugh-Nagumo model.
Effects of membrane noise on spike propagation on a nerve fiber are studied on the basis of a stochastic version of the FitzHugh-Nagumo model. The noise varies the propagation speeds of spikes and thus changes the interspike intervals of a spike train during propagation. A kinematic description of spike propagation derives expressions for the changes in the interspike intervals. It is shown that the dispersion relation causes the correlation of the interspike intervals characteristic of a spike train propagating in the refractory period.
Horikawa
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Information and Computer Science Laboratory, Faculty of Education, Kagawa University, Takamatsu, Japan.
D004560:Electricity; D004594:Electrophysiology; D006801:Humans; D008433:Mathematics; D008959:Models, Neurological; D009412:Nerve Fibers / Q000502:physiology*; D012032:Refractory Period, Electrophysiological / Q000502:physiology*