Gamma oscillations and stimulus selection

Authors:
Christoph Börgers;Nancy J. Kopell
Affiliations:
Department of Mathematics, Tufts University, Medford, MA 02155, U.S.A. christoph.borgers@tufts.edu;Department of Mathematics and Center for Biodynamics, Boston University, Boston, MA 02215, U.S.A. nk@bu.edu
Venue:
Neural Computation
Year:
2008

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Abstract

More coherent excitatory stimuli are known to have a competitive advantage over less coherent ones. We show here that this advantage is amplified greatly when the target includes inhibitory interneurons acting via GABAA-receptor-mediated synapses and the coherent input oscillates at gamma frequency. We hypothesize that therein lies, at least in part, the functional significance of the experimentally observed link between attentional biasing of stimulus competition and gamma frequency rhythmicity.