Transition between Tonic Spiking and Bursting in a Neuron Model via the Blue-Sky Catastrophe

Abstract
We study a continuous and reversible transition between periodic tonic spiking and bursting activities in a neuron model. It is described as the blue-sky catastrophe, which is a homoclinic bifurcation of a saddle-node periodic orbit of codimension one. This transition constitutes a biophysically plausible mechanism for the regulation of burst duration that increases with no bound like 1/αα0 as the transition value α0 is approached.

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