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Anti-phase solutions in relaxation oscillators coupled through excitatory interactions. (English) Zbl 0828.92005

Summary: Relaxation oscillators interacting via models of excitatory chemical synapses with sharp thresholds can have stable anti-phase as well as in- phase solutions. The mechanism for anti-phase demonstrated in this paper relies on the fact that, in a large class of neural models, excitatory input slows down the receiving oscillator over a portion of its trajectory. We analyze the effect of this “virtual delay” in an abstract model, and then show that the hypotheses of that model hold for widely used descriptions of bursting neurons.

MSC:

92C20 Neural biology
34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations
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