Episodic synchronization in dynamically driven neurons

Details Episodic synchronization in dynamically driven neurons Episodic synchronization in dynamically driven neurons

2006-05-12

arxiv.org/abs/q-bio/0605019v1

Biology

Quantitative Biology

Neurons and Cognition

7 pages, 8 figures

Scientific paper

We examine the response of type II excitable neurons to trains of synaptic pulses, as a function of the pulse frequency and amplitude. We show that the resonant behavior characteristic of type II excitability, already described for harmonic inputs, is also present for pulsed inputs. With this in mind, we study the response of neurons to pulsed input trains whose frequency varies continuously in time, and observe that the receiving neuron synchronizes episodically to the input pulses, whenever the pulse frequency lies within the neuron's locking range. We propose this behavior as a mechanism of rate-code detection in neuronal populations. The results are obtained both in numerical simulations of the Morris-Lecar model and in an electronic implementation of the FitzHugh-Nagumo system, evidencing the robustness of the phenomenon.

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