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Effects of extracellular electric fields on electrical activities of two-compartment autaptic-neurons

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  • Li, Shanshan
  • Zhang, Guoshan
  • Wang, Jiang
  • Yi, Guosheng

Abstract

In our work, we follow a modeling approach to investigate how extracellular electric fields affect the dynamics of two-compartment autaptic-neurons with morphological structures and how those effects translate into changes in electrical activities. Inter-spikes intervals bifurcation diagrams, frequency–input curves as well as phase-locking ratios are used to describe neural firing patterns, input sensitivities as well as mode-locking states. Modulated by extracellular electric fields, the autaptic-neurons exhibit subthreshold oscillation, tonic spiking, bursting and chaotic firing patterns. The input sensitivities and the mode-locking states are enhanced or suppressed depending on the parameters of extracellular electrical fields. Compared with autaptic-neurons with symmetrical structures, the autaptic-neuron with nonsymmetrical morphology have higher input sensitivities to extracellular electric fields, which suggest that neural geometric features play a crucial role in electric field effects on behaviors of neuron. Those results in our works provide a systematic understanding of effects of extracellular electric fields on the electrical activities of autaptic-neurons, which are further steps towards improving the design of electromagnetic brain stimulations.

Suggested Citation

  • Li, Shanshan & Zhang, Guoshan & Wang, Jiang & Yi, Guosheng, 2019. "Effects of extracellular electric fields on electrical activities of two-compartment autaptic-neurons," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 534(C).
    • Handle: RePEc:eee:phsmap:v:534:y:2019:i:c:s0378437119313457
    DOI: 10.1016/j.physa.2019.122331
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    References listed on IDEAS

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    1. Yilmaz, Ergin & Baysal, Veli & Ozer, Mahmut & Perc, Matjaž, 2016. "Autaptic pacemaker mediated propagation of weak rhythmic activity across small-world neuronal networks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 444(C), pages 538-546.
    2. Chunni Wang & Shengli Guo & Ying Xu & Jun Ma & Jun Tang & Faris Alzahrani & Aatef Hobiny, 2017. "Formation of Autapse Connected to Neuron and Its Biological Function," Complexity, Hindawi, vol. 2017, pages 1-9, February.
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