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Influence of synaptic interaction on firing synchronization and spike death in excitatory neuronal networks
Institute of Theoretical Physics, Lanzhou University, Lanzhou Gansu, China.
Department of Mathematics, College of Science, Shanghai University, Shanghai, China.
Umeå University, Faculty of Science and Technology, Department of Physics.
Institute of Theoretical Physics, Lanzhou University, Lanzhou Gansu, China.
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2008 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, ISSN 1063-651X, E-ISSN 1095-3787, Vol. 78, no 6, 061906- p.Article in journal (Refereed) Published
Abstract [en]

We investigate the influence of efficacy of synaptic interaction on firing synchronization in excitatoryneuronal networks. We find spike death phenomena: namely, the state of neurons transits from the limit cycleto a fixed point or transient state. The phenomena occur under the perturbation of an excitatory synapticinteraction, which has a high efficacy. We show that the decrease of synaptic current results in spike deaththrough depressing the feedback of the sodium ionic current. In the networks with the spike death property thedegree of synchronization is lower and insensitive to the heterogeneity of neurons. The mechanism of theinfluence is that the transition of the neuron state disrupts the adjustment of the rhythm of the neuronsoscillation and prevents a further increase of the firing synchronization.

Place, publisher, year, edition, pages
New York: American Physical Society through the American Institute of Physics , 2008. Vol. 78, no 6, 061906- p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-19008DOI: 10.1103/PhysRevE.78.061906OAI: oai:DiVA.org:umu-19008DiVA: diva2:201161
Available from: 2009-06-17 Created: 2009-03-03 Last updated: 2017-12-13Bibliographically approved

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