title: Double coherence resonance in neuron models driven by discrete correlated noise.
abstract: We study the influence of correlations among discrete stochastic excitatory or inhibitory inputs on the response of the FitzHugh-Nagumo neuron model. For any level of correlation, the emitted signal exhibits at some finite noise intensity a maximal degree of regularity, i.e., a coherence resonance. Furthermore, for either inhibitory or excitatory correlated stimuli, a double coherence resonance is observable. Double coherence resonance refers to a (absolute) maximum coherence in the output occurring for an optimal combination of noise variance and correlation. All of these effects can be explained by taking advantage of the discrete nature of the correlated inputs.
authors.affiliation: Istituto dei Sistemi Complessi-CNR, Sesto Fiorentino, Italy. thomas.kreuz@fi.isc.cnr.it
authors.forename: Thomas
authors.initials: T
authors.lastname: Kreuz
authors.forename: Stefano
authors.initials: S
authors.lastname: Luccioli
authors.forename: Alessandro
authors.initials: A
authors.lastname: Torcini
mesh_terms: D008564:Membrane Potentials; D008959:Models, Neurological; D009474:Neurons / Q000502:physiology*; D013269:Stochastic Processes; D013569:Synapses / Q000502:physiology