中国物理B ›› 2020, Vol. 29 ›› Issue (9): 98704-098704.doi: 10.1088/1674-1056/ab9dee

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Dynamics and coherence resonance in a thermosensitive neuron driven by photocurrent

Ying Xu(徐莹), Minghua Liu(刘明华), Zhigang Zhu(朱志刚), Jun Ma(马军)   

  1. 1 Department of Physics, Lanzhou University of Technology, Lanzhou 730050, China;
    2 Department of Physics, Central China Normal University, Wuhan 430079, China;
    3 Electrical Engineering College, Northwest Minzu University, Lanzhou 730124, China;
    4 School of Science, Chongqing University of Posts and Telecommunications, Chongqing 430065, China
  • 收稿日期:2020-05-16 修回日期:2020-06-08 接受日期:2020-06-18 出版日期:2020-09-05 发布日期:2020-09-05
  • 通讯作者: Jun Ma E-mail:hyperchaos@lut.edu.cn,hyperchaos@163.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11672122).

Dynamics and coherence resonance in a thermosensitive neuron driven by photocurrent

Ying Xu(徐莹)1,2, Minghua Liu(刘明华)3,1, Zhigang Zhu(朱志刚)1, Jun Ma(马军)1,4   

  1. 1 Department of Physics, Lanzhou University of Technology, Lanzhou 730050, China;
    2 Department of Physics, Central China Normal University, Wuhan 430079, China;
    3 Electrical Engineering College, Northwest Minzu University, Lanzhou 730124, China;
    4 School of Science, Chongqing University of Posts and Telecommunications, Chongqing 430065, China
  • Received:2020-05-16 Revised:2020-06-08 Accepted:2020-06-18 Online:2020-09-05 Published:2020-09-05
  • Contact: Jun Ma E-mail:hyperchaos@lut.edu.cn,hyperchaos@163.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11672122).

摘要:

A feasible neuron model can be effective to estimate the mode transition in neural activities in a complex electromagnetic environment. When neurons are exposed to electromagnetic field, the continuous magnetization and polarization can generate nonlinear effect on the exchange and propagation of ions in the cell, and then the firing patterns can be regulated completely. The conductivity of ion channels can be affected by the temperature and the channel current is adjusted for regulating the excitability of neurons. In this paper, a phototube and a thermistor are used to the functions of neural circuit. The phototube is used to capture external illumination for energy injection, and a continuous signal source is obtained. The thermistor is used to percept the changes of temperature, and the channel current is changed to adjust the excitability of neuron. This functional neural circuit can encode the external heat (temperature) and illumination excitation, and the dynamics of neural activities is investigated in detail. The photocurrent generated in the phototube can be used as a signal source for the neural circuit, and the thermistor is used to estimate the conduction dependence on the temperature for neurons under heat effect. Bifurcation analysis and Hamilton energy are calculated to explore the mode selection. It is found that complete dynamical properties of biological neurons can be reproduced in spiking, bursting, and chaotic firing when the phototube is activated as voltage source. The functional neural circuit mainly presents spiking states when the photocurrent is handled as a stable current source. Gaussian white noise is imposed to detect the occurrence of coherence resonance. This neural circuit can provide possible guidance for investigating dynamics of neural networks and potential application in designing sensitive sensors.

关键词: thermosensitive neuron, thermistor, phototube, bifurcation, coherence resonance

Abstract:

A feasible neuron model can be effective to estimate the mode transition in neural activities in a complex electromagnetic environment. When neurons are exposed to electromagnetic field, the continuous magnetization and polarization can generate nonlinear effect on the exchange and propagation of ions in the cell, and then the firing patterns can be regulated completely. The conductivity of ion channels can be affected by the temperature and the channel current is adjusted for regulating the excitability of neurons. In this paper, a phototube and a thermistor are used to the functions of neural circuit. The phototube is used to capture external illumination for energy injection, and a continuous signal source is obtained. The thermistor is used to percept the changes of temperature, and the channel current is changed to adjust the excitability of neuron. This functional neural circuit can encode the external heat (temperature) and illumination excitation, and the dynamics of neural activities is investigated in detail. The photocurrent generated in the phototube can be used as a signal source for the neural circuit, and the thermistor is used to estimate the conduction dependence on the temperature for neurons under heat effect. Bifurcation analysis and Hamilton energy are calculated to explore the mode selection. It is found that complete dynamical properties of biological neurons can be reproduced in spiking, bursting, and chaotic firing when the phototube is activated as voltage source. The functional neural circuit mainly presents spiking states when the photocurrent is handled as a stable current source. Gaussian white noise is imposed to detect the occurrence of coherence resonance. This neural circuit can provide possible guidance for investigating dynamics of neural networks and potential application in designing sensitive sensors.

Key words: thermosensitive neuron, thermistor, phototube, bifurcation, coherence resonance

中图分类号:  (Neuronal wave propagation)

  • 87.19.lq
87.18.Hf (Spatiotemporal pattern formation in cellular populations) 05.45.-a (Nonlinear dynamics and chaos)