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arXiv 0705.4316q-bio.NCphysics.bio-ph
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电导空间中被平面边界分隔的单隔室神经元的两种计算状态

Two computational regimes of a single-compartment neuron separated by a planar boundary in conductance space

Brian Nils Lundstrom, Sungho Hong, Matthew H. Higgs, Adrienne L. Fairhall

摘要:

最近的体外实验数据表明,神经元对输入变量的反应具有不同的敏感性。在这里,我们证明了霍奇金-赫胥黎(HH)神经元可以在两个计算机制,一个是更敏感的输入方差(微分),一个是不太敏感(积分)。3D电导空间中的边界平面将这两个区域分开。对于简化的HH模型,该平面可以从V零倾解析地导出,从而建议通过分析神经元的动力系统将生物物理参数与神经计算相关联的方法。

英文摘要:

Recent in vitro data show that neurons respond to input variance with varying sensitivities. Here, we demonstrate that Hodgkin-Huxley (HH) neurons can operate in two computational regimes, one that is more sensitive to input variance (differentiating) and one that is less sensitive (integrating). A boundary plane in the 3D conductance space separates these two regimes. For a reduced HH model, this plane can be derived analytically from the V nullcline, thus suggesting a means of relating biophysical parameters to neural computation by analyzing the neuron's dynamical system.

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