title: Effects of time delay on the stochastic resonance in small-world neuronal networks.
abstract: The effects of time delay on stochastic resonance in small-world neuronal networks are investigated. Without delay, an intermediate intensity of additive noise is able to optimize the temporal response of the neural system to the subthreshold periodic signal imposed on all neurons constituting the network. The time delay in the coupling process can either enhance or destroy stochastic resonance of neuronal activity in the small-world network. In particular, appropriately tuned delays can induce multiple stochastic resonances, which appear intermittently at integer multiples of the oscillation period of weak external forcing. It is found that the delay-induced multiple stochastic resonances are most efficient when the forcing frequency is close to the global-resonance frequency of each individual neuron. Furthermore, the impact of time delay on stochastic resonance is largely independent of the small-world topology, except for resonance peaks. Considering that information transmission delays are inevitable in intra- and inter-neuronal communication, the presented results could have important implications for the weak signal detection and information propagation in neural systems.
authors.affiliation: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, People's Republic of China.
authors.forename: Haitao
authors.initials: H
authors.lastname: Yu
authors.forename: Jiang
authors.initials: J
authors.lastname: Wang
authors.forename: Jiwei
authors.initials: J
authors.lastname: Du
authors.forename: Bin
authors.initials: B
authors.lastname: Deng
authors.forename: Xile
authors.initials: X
authors.lastname: Wei
authors.forename: Chen
authors.initials: C
authors.lastname: Liu
mesh_terms: D000200:Action Potentials; D000818:Animals; D001921:Brain / Q000166:cytology / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D008959:Models, Neurological; D009415:Nerve Net / Q000502:physiology*; D009716:Numerical Analysis, Computer-Assisted; D011930:Reaction Time; D017603:Signal Detection, Psychological; D059629:Signal-To-Noise Ratio; D013269:Stochastic Processes; D009435:Synaptic Transmission; D013598:Systems Theory; D013997:Time Factors