光电管耦合FitzHugh-Nagumo神经元的同步  

Synchronization between FitzHugh-Nagumo neurons coupled with phototube

作　　者：张秀芳 马军[1] 徐莹 任国栋[1] Zhang Xiu-Fang;Ma Jun;Xu Ying;Ren Guo-Dong(Department of Physics,Lanzhou University of Technology,Lanzhou 730050,China;School of Mathematics and Statistics,Shandong Normal University,Ji’nan 250014,China)

机构地区：[1]兰州理工大学物理系,兰州730050 [2]山东师范大学数学与统计学院,济南250014

出　　处：《物理学报》2021年第9期226-235,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11672122,12062009);甘肃省自然科学基金(批准号:20JR5RA473)资助的课题。

摘　　要：感光细胞能接收各种强度的可见光,并转换为生物电信号连接视神经;这样的功能可以用光电效应来模拟.本文利用数值计算,分析了基于光电管耦合FitzHugh-Nagumo (FHN)神经元的动力学特性,详细讨论了光电管的参数空间中,混沌和簇放电模式下耦合系统的同步区间.结果表明:在耦合强度较小时,耦合系统由于受迫共振表现为完全同步;耦合强度较大时,耦合系统倾向于相位同步.光电管的导通状态,即反向截止电压对系统同步具有调制作用.这项工作有助于理解视网膜疾病,如黄斑变性的原理.The photoreceptors can receive all kinds of visible light which is translated to the bioelectrical signal for the visual cortex.The function would be simulated by the photoelectric effect.This paper studies the dynamic characteristics of FitzHugh-Nagumo neurons coupled with a phototube.In the parameter space of phototube,the synchronization region of the coupled system in which the neuron mode is in chaos and burst,is discussed in detail;the data show that the forced resonance is prominent in the complete synchronization of the system when the coupling strength is low,while the phase synchronization is observed in numerical experiment when the coupling strength is strong.The active operation of the phototube,as well the inverse cutoff voltage can modulate the synchronization of the system.Our work can be used to understand the mechanism of the retinal diseases,such as macular degeneration.

关 键 词：神经元 光电管 同步 相位锁定 

分 类 号：Q42[生物学—神经生物学]