کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
758856 896454 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiple firing coherence resonances in excitatory and inhibitory coupled neurons
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Multiple firing coherence resonances in excitatory and inhibitory coupled neurons
چکیده انگلیسی

The impact of inhibitory and excitatory synapses in delay-coupled Hodgkin–Huxley neurons that are driven by noise is studied. If both synaptic types are used for coupling, appropriately tuned delays in the inhibition feedback induce multiple firing coherence resonances at sufficiently strong coupling strengths, thus giving rise to tongues of coherency in the corresponding delay-strength parameter plane. If only inhibitory synapses are used, however, appropriately tuned delays also give rise to multiresonant responses, yet the successive delays warranting an optimal coherence of excitations obey different relations with regards to the inherent time scales of neuronal dynamics. This leads to denser coherence resonance patterns in the delay-strength parameter plane. The robustness of these findings to the introduction of delay in the excitatory feedback, to noise, and to the number of coupled neurons is examined. Mechanisms underlying our observations are revealed, and it is suggested that the regularity of spiking across neuronal networks can be optimized in an unexpectedly rich variety of ways, depending on the type of coupling and the duration of delays.


► Noise-enhanced precision of neuronal firing depends on the type of synaptic coupling and the duration of delays.
► Multiple tongues of coherency in the delay – coupling strength parameter plane.
► Resonant matching of the different time scales is twice as efficient in the absence of excitatory coupling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Communications in Nonlinear Science and Numerical Simulation - Volume 17, Issue 10, October 2012, Pages 3979–3988
نویسندگان
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