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Cooperation of intrinsic bursting and calcium oscillations underlying activity patterns of model pre-Botzinger complex neurons

机译:模型前Botzinger复杂神经元活动模式的内在爆发和钙振荡的合作

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Activity of neurons in the pre-Botzinger complex (pre-BotC) within the mammalian brainstem drives the inspiratory phase of the respiratory rhythm. Experimental results have suggested that multiple bursting mechanisms based on a calcium-activated nonspecific cationic (CAN) current, a persistent sodium (NaP) current, and calcium dynamics may be incorporated within the pre-BotC. Previous modeling works have incorporated representations of some or all of these mechanisms. In this study, we consider a single-compartment model of a pre-BotC inspiratory neuron that encompasses particular aspects of all of these features. We present a novel mathematical analysis of the interaction of the corresponding rhythmic mechanisms arising in the model, including square-wave bursting and autonomous calcium oscillations, which requires treatment of a system of differential equations incorporating three slow variables.
机译:哺乳动物脑干内的前Botzinger复合体(pre-BotC)中的神经元活动驱动了呼吸节律的吸气阶段。实验结果表明,基于钙激活的非特异性阳离子(CAN)电流,持续性钠(NaP)电流和钙动力学的多种爆发机制可以纳入pre-BotC中。先前的建模工作已经结合了其中一些或所有机制的表示。在这项研究中,我们考虑了一个包含BotC前吸气神经元的单室模型,该模型涵盖了所有这些特征的特定方面。我们提出了一种新的数学分析,该模型中模型中相应的节奏机制之间的相互作用包括方波猝发和自主性钙振荡,这需要对包含三个慢变量的微分方程组进行处理。

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