Multimodal transition and excitability of a neural oscillator

L. Borkowski
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引用次数: 4

Abstract

We analyze the response of the Morris-Lecar model to a periodic train of short current pulses in the period-amplitude plane. For a wide parameter range encompassing both class 2 and class 3 behavior in Hodgkin's classification there is a multimodal transition between the set of odd modes and the set of all modes. It is located between the 2:1 and 3:1 locked-in regions. It is the same dynamic instability as the one discovered earlier in the Hodgkin-Huxley model and observed experimentally in squid giant axons. It appears simultaneously with the bistability of the states 2:1 and 3:1 in the perithreshold regime. These results imply that the multimodal transition may be a universal property of resonant neurons.
神经振荡器的多模态跃迁和兴奋性
我们分析了Morris-Lecar模型在周期-振幅平面上对短电流脉冲周期序列的响应。对于包含Hodgkin分类中的第2类和第3类行为的宽参数范围,在奇模态集和全模态集之间存在多模态转换。它位于2:1和3:1锁定区域之间。这种动态不稳定性与先前在霍奇金-赫胥黎模型中发现并在乌贼巨大轴突中实验观察到的动态不稳定性相同。它与阈值附近状态2:1和3:1的双稳性同时出现。这些结果表明,多模态转变可能是共振神经元的普遍特性。
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