Download Katie Newhall Synchrony in stochastic pulse-coupled neuronal network models

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Transcript
Katie Newhall
Synchrony in stochastic pulse-coupled neuronal network models
Many pulse-coupled dynamical systems possess synchronous attracting states.
Even stochastically driven model networks of Integrate and Fire neurons
demonstrate synchrony over a large range of parameters. We study the interplay
between fluctuations which de-synchronize and synaptic coupling which
synchronizes the network by calculating the probability to see repeated cascading
total firing events, during which all the neurons in the network fire at once. The
mean time between total firing events characterizes the perfectly synchronous
state, and is computed from a first-passage time problem in terms of a FokkerPlanck equation for a single neuron.