Transitions to synchrony in coupled bursting neurons
Transitions to synchrony in coupled bursting neurons
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DOI：
10.1103/physrevlett.92.028101
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发表时间：
2004-01-16
影响因子：
8.6
通讯作者：
Ding, MZ
中科院分区：
文献类型：
--
作者：
Dhamala, M;Jirsa, VK;Ding, MZ
大脑中的某些细胞，例如睡眠中的丘脑神经元，会表现出尖峰爆发活动。我们用一个耦合的突发神经元模型研究了这种突发神经元的活动和向同步状态的过渡。在电耦合网络中，我们证明了耦合强度的增加首先增加了非相干性，然后诱导了两种不同的向同步状态的转变，一种与脉冲有关，另一种与尖峰有关。这些顺序跃迁到同步状态是由最大横向李雅普诺夫指数的零交叉点决定的。这些结果表明，尖峰-突发活动的同步是一个多时间尺度的现象，而突发同步是尖峰同步的前兆。
Certain cells in the brain, for example, thalamic neurons during sleep, show spike-burst activity. We study such spike-burst neural activity and the transitions to a synchronized state using a model of coupled bursting neurons. In an electrically coupled network, we show that the increase of coupling strength increases incoherence first and then induces two different transitions to synchronized states, one associated with bursts and the other with spikes. These sequential transitions to synchronized states are determined by the zero crossings of the maximum transverse Lyapunov exponents. These results suggest that synchronization of spike-burst activity is a multi-time-scale phenomenon and burst synchrony is a precursor to spike synchrony.