On-off intermittency in small neural networks with time-dependent synapticnoise

Numerical evidence is presented for the occurence of on-off intermittency a nd attractor bubbling in the time series of synaptic potentials of analog n eurons with time-dependent synaptic noise. The cases of continuous noise wi th uniform distribution of values and (physiologically motivated) quantal n oise with binomial distribution are considered. The results were obtained f or a single neuron with synaptic self-connection and a network of two neuro ns with various weights of synaptic connections. In the latter case coexist ence of a neuron showing on-off intermittency with another one, showing att ractor bubbling, is possible.