Parameter dependence of stochastic resonance in the stochastic Hodgkin-Huxley neuron
Parameter dependence of stochastic resonance in the stochastic Hodgkin-Huxley neuron
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DOI：
10.1103/physreve.60.826
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发表时间：
1999-07-01
影响因子：
2.4
通讯作者：
Kim, S
中科院分区：
文献类型：
--
作者：
Lee, SG;Kim, S
近年来，随机共振（SR）现象在固有噪声作用下的可激系统，特别是神经系统的研究中引起了广泛的关注。本文研究了随机Hodgkin-Huxley神经元在Ornstein-Uhlenbeck噪声和周期性刺激下的SR，着重研究了SR的性质对刺激参数的依赖关系。我们发现，临界强迫振幅对周期激励频率的依赖关系呈现出钟形结构，在激励频率处有一个极小值，这与在小频率范围内观察到的单调依赖关系有很大不同.的临界强迫振幅的频率依赖性的解释与发射开始的Hodgkin-Huxley神经元的分岔曲线在确定性的情况。最大放大的最佳噪声强度也被发现显示出类似的结构。[S1063-651X（99）03407-8]。
Recently, the phenomena of stochastic resonance (SR) have attracted much attention in the studies of the excitable systems under inherent noise, in particular, nervous systems. We study SR in a stochastic Hodgkin-Huxley neuron under Ornstein-Uhlenbeck noise and periodic stimulus, focusing on the dependence of properties of SR on stimulus parameters. We find that the dependence of the critical forcing amplitude on the frequency of the periodic stimulus shows a bell-shaped structure with a minimum at the stimulus frequency, which is quite different from the monotonous dependence observed in the bistable system at a small frequency range. The frequency dependence of the critical forcing amplitude is explained in connection with the firing onset bifurcation curve of the Hodgkin-Huxley neuron in the deterministic situation. The optimal noise intensity for maximal amplification is also found to show a similar structure. [S1063-651X(99)03407-8].