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Oscillations emerging from noise-driven steady state in networks with electrical synapses and subthreshold resonance

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  • Tatjana Tchumatchenko

    (Max Planck Institute for Brain Research)

  • Claudia Clopath

    (Imperial College London)

Abstract

Oscillations play a critical role in cognitive phenomena and have been observed in many brain regions. Experimental evidence indicates that classes of neurons exhibit properties that could promote oscillations, such as subthreshold resonance and electrical gap junctions. Typically, these two properties are studied separately but it is not clear which is the dominant determinant of global network rhythms. Our aim is to provide an analytical understanding of how these two effects destabilize the fluctuation-driven state, in which neurons fire irregularly, and lead to an emergence of global synchronous oscillations. Here we show how the oscillation frequency is shaped by single neuron resonance, electrical and chemical synapses.The presence of both gap junctions and subthreshold resonance are necessary for the emergence of oscillations. Our results are in agreement with several experimental observations such as network responses to oscillatory inputs and offer a much-needed conceptual link connecting a collection of disparate effects observed in networks.

Suggested Citation

  • Tatjana Tchumatchenko & Claudia Clopath, 2014. "Oscillations emerging from noise-driven steady state in networks with electrical synapses and subthreshold resonance," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6512
    DOI: 10.1038/ncomms6512
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