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arXiv 2011.12832q-bio.NCcs.SYeess.SY
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基于LIF模型的PreSynaptic神经元的外部电磁波激励

External Electromagnetic Wave Excitation of a PreSynaptic Neuron Based on LIF model

Emad Arasteh Emamzadeh-Hashemi, Ailar Mahdizadeh

摘要:

电磁波与人体组织的相互作用一直是电气和生物医学工程师的长期研究课题。然而,很少有出版物讨论外部电磁波对神经刺激和通过神经系统的通信的影响。事实上,复杂的生物神经通道是该领域完整和全面分析的主要障碍。神经通信反应中的一个永恒的挑战是囊泡释放概率对输入尖峰模式的依赖性。在这方面,本研究揭示了改变外部电磁波激发频率对突触后神经元尖峰发放率的影响。假设波在脑中的穿透深度不覆盖突触后神经元。因此,我们建立了一个二分化学突触的神经传递模型。此外,外部刺激影响神经传递的方式进行了检查。与多频率分量电磁波不同,单色入射波在色散介质中不面临频移和畸变。以这种方式,一个单一的频率信号被添加作为外部电流的修改后的泄漏集成andfire(LIF)模型。结果表明,LIF模型的一阶动力系统存在一个节点平衡点。当外部激励频率接近200 Hz时,发生折叠分叉(对于预设的LIF模型值)。本文提供的结果使我们能够选择合适的频率激励神经信号。相应地,发现了LIF电路的截止频率对元件值的依赖关系。

英文摘要:

Interaction of electromagnetic (EM) waves with human tissue has been a longstanding research topic for electrical and biomedical engineers. However, few numbers of publications discuss the impacts of external EM-waves on neural stimulation and communication through the nervous system. In fact, complex biological neural channels are a main barrier for intact and comprehensive analyses in this area. One of the everpresent challenges in neural communication responses is dependency of vesicle release probability on the input spiking pattern. In this regard, this study sheds light on consequences of changing the frequency of external EM-wave excitation on the post-synaptic neuron's spiking rate. It is assumed that the penetration depth of the wave in brain does not cover the postsynaptic neuron. Consequently, we model neurotransmission of a bipartite chemical synapse. In addition, the way that external stimulation affects neurotransmission is examined. Unlike multiple frequency component EM-waves, the monochromatic incident wave does not face frequency shift and distortion in dispersive media. In this manner, a single frequency signal is added as external current in the modified leaky integrated-andfire (LIF) model. The results demonstrate existence of a node equilibrium point in the first order dynamical system of LIF model. A fold bifurcation (for presupposed LIF model values) occurs when the external excitation frequency is near 200 Hz. The outcomes provided in this paper enable us to select proper frequency excitation for neural signaling. Correspondingly, the cut-off frequency reliance on elements' values in LIF circuit is found.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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