Noise-delayed decay in the response of a scale-free neuronal network
Muhammet Uzuntarla, Ergin Yilmaz, Rukiye Uzun, M Özer, Matjaz Perc
article (Uluslararası, Hakemli) | Yazar(lar): Muhammet Uzuntarla, Ergin Yilmaz, Rukiye Uzun, M Özer, Matjaz Perc | Yıl: 2013 | Dergi/Kurum: CHAOS SOLITONS & FRACTALS | İndeks: WOS.SCI | DOI: 10.1016/j.chaos.2013.08.009 — Özet: Noise-delayed decay occurs when the first-spike latency of a periodically forced neuron exhib
Noise-delayed decay occurs when the first-spike latency of a periodically forced neuron exhibits a maximum at particular noise intensity. Here we investigate this phenomenon at the network level, in particular by considering scale-free neuronal networks, and under the realistic assumption of noise being due to the stochastic nature of voltage-gated ion channels that are embedded in the neuronal membranes. We show that noise-delayed decay can be observed at the network level, but only if the synaptic coupling strength between the neurons is weak. In case of strong coupling or in a highly interconnected population the phenomenon vanishes, thus indicating that delays in signal detection can no longer be resonantly prolonged by noise. We also find that potassium channel noise plays a more dominant role in the occurrence of noise-delayed decay than sodium channel noise, and that poisoning the neuronal membranes may weakens or intensify the phenomenon depending on targeting. (C) 2013 Elsevier Ltd. All rights reserved.