HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Rodríguez, F. B. Articles by López, V. Search for Related Content PubMed PubMed Citation Articles by Rodríguez, F. B. Articles by López, V.

Period Focusing Induced by Network Feedback in Populations of Noisy Integrate-and-Fire Neurons

Escuela Técnica Superior de Informática, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

Alberto Suárez

Escuela Técnica Superior de Informática, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

Vicente López

Escuela Técnica Superior de Informática, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

The population dynamics of an ensemble of nonleaky integrate-and-fire stochastic neurons is studied. The model selected allows for a detailed analysis of situations where noise plays a dominant role. Simulations in a regime with weak to moderate interactions show that a mechanism of excitatory message interchange among the neurons leads to a decrease in the firing period dispersion of the individual units. The dispersion reduction observed is larger than what would be expected from the decrease in the period. This "period focusing" is explained using a mean-field model. It is a dynamical effect that arises from the progressive decrease of the effective firing threshold as a result of the messages received by each unit from the rest of the population. A back-of-the-envelope formula to calculate this nontrivial dispersion reduction and a simple geometrical description of the effect are also provided.

This article has been cited by other articles:

				A. Kaltenbrunner, V. Gomez, and V. Lopez Phase Transition and Hysteresis in an Ensemble of Stochastic Spiking Neurons Neural Comput., November 1, 2007; 19(11): 3011 - 3050. [Abstract] [Full Text] [PDF]