Autonomous and nonautonomous dynamics of functional model of serotonergic neuron
Serotonin is a key modulator of neuronal activity both at the system level and at the level of local (short-range) interactions. However, in contrast to the synaptically connected neuron ensembles, there are much less qualitative models that describe the serotonin-controlled neural circuits. In this paper, we propose a relatively simple model of serotonergic (serotonin-releasing and serotonin-sensitive) neuron. It is shown that specific features of both autonomous and nonautonomous dynamics of such model are considerably dependent on a weak depolarizing voltage-independent current of neuron and on the presence of serotonin auto-receptors. Our work is aimed on development of «computational image» for basic serotonin-controlled neural circuits, which role for basic neuronal features plays the famous FitzHugh-Nagumo model.