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[哺乳动物神经元节律性活动机制的模型研究]

[Model studies of mechanisms of the rhythmic activity of mammalian neurons].

作者信息

Mironov S L

出版信息

Neirofiziologiia. 1984;16(4):445-51.

PMID:6493393
Abstract

A model of electric excitability of mammalian neurons is developed based on described properties of the corresponding ionic currents. It is shown that these neurons may possess two types of rhythmic activity. The first type corresponds to the combination of the fast sodium and delayed potassium currents, the average period of membrane potential oscillations being 74 +/- 27 ms. The second type is determined by calcium and Ca-dependent potassium currents, and its interspike interval is equal to 850 +/- 40 ms. Two mechanisms of adaptation (elongation of the interspike interval) of rhythmic activity are predicted for these neurons. The former is determined by the fast potassium current and the latter is due to accumulation of calcium ions inside the cell and the development of Ca-dependent potassium conductance.

摘要

基于所描述的相应离子电流特性,建立了哺乳动物神经元电兴奋性模型。结果表明,这些神经元可能具有两种节律性活动。第一种类型对应于快速钠电流和延迟钾电流的组合,膜电位振荡的平均周期为74±27毫秒。第二种类型由钙电流和钙依赖性钾电流决定,其峰间间隔等于850±40毫秒。预测了这些神经元节律性活动的两种适应机制(峰间间隔延长)。前者由快速钾电流决定,后者是由于细胞内钙离子的积累和钙依赖性钾电导的发展。

相似文献

1
[Model studies of mechanisms of the rhythmic activity of mammalian neurons].[哺乳动物神经元节律性活动机制的模型研究]
Neirofiziologiia. 1984;16(4):445-51.
2
Possible mechanisms underlying bursting pacemaker discharges in invertebrate neurons.无脊椎动物神经元中爆发性起搏器放电的潜在机制。
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Fast rhythmic bursting can be induced in layer 2/3 cortical neurons by enhancing persistent Na+ conductance or by blocking BK channels.通过增强持续性钠电导或阻断大电导钙激活钾通道(BK通道),可在2/3层皮质神经元中诱导出快速节律性爆发。
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Slow repetitive activity from fast conductance changes in neurons.神经元快速电导变化引起的缓慢重复活动。
Fed Proc. 1978 Jun;37(8):2139-45.
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Mathematical model of pacemaker activity in bursting neurons of snail, Helix pomatia.蜗牛(Helix pomatia)爆发性神经元中起搏器活动的数学模型。
J Theor Biol. 1996 Nov 21;183(2):207-18. doi: 10.1006/jtbi.1996.0214.
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[Modelling the oscillatory electrical activity of mollusk neurons].
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Ionic mechanisms in the generation of subthreshold oscillations and action potential clustering in entorhinal layer II stellate neurons.内嗅皮层II层星状神经元阈下振荡和动作电位簇产生中的离子机制。
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Peptidergic counter-regulation of Ca(2+)- and Na(+)-dependent K(+) currents modulates the shape of action potentials in neurosecretory insect neurons.肽能对钙和钠依赖性钾电流的反调节作用调节神经分泌昆虫神经元动作电位的形状。
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Ionic mechanisms of rhythmic firing.
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[Mathematical model of neuronal adaptation taking into account the effect of calcium on membrane permeability to potassium ions].[考虑钙对细胞膜钾离子通透性影响的神经元适应性数学模型]
Biofizika. 1978 Jul-Aug;23(4):668-73.

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