Oscillatory Modes in a Neuronal Network Model with Transmission Latency

We analyzed the oscillatory activities in a neuronal network model as the basis of synchrony of the activities in the brain. The model consists of two groups of neurons which are interconnected. One group is composed of an excitatory and an inhibitory neuron which are expressed by Hodgkin-Huxley equation. In the present study asymmetricity is introduced by nonidentical neuron groups. The network shows a variety of oscillatory modes depending on the structure and intensity of interconnection between groups or coupling of neurons in the group, or the value of transmission latency. The model generates different oscillations with the same parameter values of coupling and latency for different initial conditions