Noise delays onset of sustained firing in a minimal model of persistent activity
Noise delays onset of sustained firing in a minimal model of persistent activity
复制标题
DOI：
10.1016/j.neucom.2004.01.123
复制
发表时间：
2004-06-01
期刊：
影响因子：
6
通讯作者：
Jost, J
中科院分区：
文献类型：
--
作者：
Gutkin, B;Hely, T;Jost, J
我们报告了一个简单的神经回路中，噪声引起的分叉延迟导致持续的突触持续放电。两个神经鞍结振荡器与相互兴奋性突触耦合。增加突触电流使电路通过分叉进入一个双反相区。向两个神经元施加小的随机电流延迟了双稳态的开始。我们分析了各种活动状态的相平面，发现这种噪声引起的机制可能与异步和同步活动状态的结构有关。(C)2004 Elsevier B.V.保留所有权利。
We report a noise-induced delay of bifurcation leading to persistent synaptically sustained firing in a simple neural circuit. Two neural saddle-node oscillators are coupled with reciprocal excitatory synapses. Increasing synaptic current moves the circuit through a bifurcation into a bistable anti-phase regime. Applying a small random current to both neurons delays the onset of bistability. We analyse the phase plane for the various activity regimes and find that this noise induced mechansim can be related to the structure of asynchronous and synchronous activity states. (C) 2004 Elsevier B.V. All rights reserved.