神经系统中的时滞反馈
Time-delayed feedback in neurosystems
摘要：
在FitzHugh-Nagumo模型的框架下研究了时滞对两个耦合可兴奋神经元系统的影响。时滞可以发生在神经元之间的耦合或自反馈回路中。瞬时耦合神经元在白噪声影响下的随机同步可以通过局部时滞反馈来控制。通过适当选择延迟时间，可以增强或抑制同步。在时滞耦合神经元中，当时滞和耦合强度足够大时，神经元会产生反相振荡。延时自反馈的额外应用导致同步同相或反相振荡、突发模式或振幅死亡的复杂场景。
英文摘要：
The influence of time delay in systems of two coupled excitable neurons is studied in the framework of the FitzHugh-Nagumo model. Time-delay can occur in the coupling between neurons or in a self-feedback loop. The stochastic synchronization of instantaneously coupled neurons under the influence of white noise can be deliberately controlled by local time-delayed feedback. By appropriate choice of the delay time synchronization can be either enhanced or suppressed. In delay-coupled neurons, antiphase oscillations can be induced for sufficiently large delay and coupling strength. The additional application of time-delayed self-feedback leads to complex scenarios of synchronized in-phase or antiphase oscillations, bursting patterns, or amplitude death.
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