Delay-induced multiple stochastic resonances on scale-free neuronal networks

Details Delay-induced multiple stochastic resonances on scale-free neuronal networks Delay-induced multiple stochastic resonances on scale-free neuronal networks

2009-06-05

arxiv.org/abs/0906.1186v1

Chaos 19 (2009) 023112

Biology

Quantitative Biology

Neurons and Cognition

7 two-column pages, 5 figures; accepted for publication in Chaos

Scientific paper

10.1063/1.3133126

We study the effects of periodic subthreshold pacemaker activity and time-delayed coupling on stochastic resonance over scale-free neuronal networks. As the two extreme options, we introduce the pacemaker respectively to the neuron with the highest degree and to one of the neurons with the lowest degree within the network, but we also consider the case when all neurons are exposed to the periodic forcing. In the absence of delay, we show that an intermediate intensity of noise is able to optimally assist the pacemaker in imposing its rhythm on the whole ensemble, irrespective to its placing, thus providing evidences for stochastic resonance on the scale-free neuronal networks. Interestingly thereby, if the forcing in form of a periodic pulse train is introduced to all neurons forming the network, the stochastic resonance decreases as compared to the case when only a single neuron is paced. Moreover, we show that finite delays in coupling can significantly affect the stochastic resonance on scale-free neuronal networks. In particular, appropriately tuned delays can induce multiple stochastic resonances independently of the placing of the pacemaker, but they can also altogether destroy stochastic resonance. Delay-induced multiple stochastic resonances manifest as well-expressed maxima of the correlation measure, appearing at every multiple of the pacemaker period. We argue that fine-tuned delays and locally active pacemakers are vital for assuring optimal conditions for stochastic resonance on complex neuronal networks.

Affiliated with

Also associated with

No associations

Rating

Delay-induced multiple stochastic resonances on scale-free neuronal networks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Delay-induced multiple stochastic resonances on scale-free neuronal networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay-induced multiple stochastic resonances on scale-free neuronal networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-523025