中国物理B ›› 2012, Vol. 21 ›› Issue (2): 28702-028702.doi: 10.1088/1674-1056/21/2/028702

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

宁维莲,张争珍,曾上游,罗晓曙,胡锦霖,曾绍稳,邱怡,吴慧思   

  • 收稿日期:2011-06-30 修回日期:2011-09-01 出版日期:2012-01-30 发布日期:2012-01-30
  • 通讯作者: 曾上游,zsy@mailbox.gxnu.edu.cn E-mail:zsy@mailbox.gxnu.edu.cn

Coherence resonance in globally coupled neuronal networks with different neuron numbers

Ning Wei-Lian(宁维莲), Zhang Zheng-Zhen(张争珍), Zeng Shang-You(曾上游)†, Luo Xiao-Shu(罗晓曙), Hu Jin-Lin(胡锦霖), Zeng Shao-Wen(曾绍稳), Qiu Yi(邱怡), and Wu Hui-Si(吴慧思)   

  1. College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China
  • Received:2011-06-30 Revised:2011-09-01 Online:2012-01-30 Published:2012-01-30
  • Contact: Zeng Shang-You,zsy@mailbox.gxnu.edu.cn E-mail:zsy@mailbox.gxnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11065003), the Natural Science Foundation of Guangxi Zhuang Autonoomous Region, China (Grant No. 2011GXNSFA018129), and the Research Funding of Education Department of Guangxi Zhuang Autonoomous Region of China (Grant No. 201012MS026).

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Abstract: Because a brain consists of tremendous neuronal networks with different neuron numbers ranging from tens to tens of thousands, we study the coherence resonance due to ion channel noises in globally coupled neuronal networks with different neuron numbers. We confirm that for all neuronal networks with different neuron numbers there exist the array enhanced coherence resonance and the optimal synaptic conductance to cause the maximal spiking coherence. Furthermoremore, the enhancement effects of coupling on spiking coherence and on optimal synaptic conductance are almost the same, regardless of the neuron numbers in the neuronal networks. Therefore for all the neuronal networks with different neuron numbers in the brain, relative weak synaptic conductance (0.1 mS/cm2) is sufficient to induce the maximal spiking coherence and the best sub-threshold signal encoding.

Key words: coherence resonance, ion channel noise, neuronal network

中图分类号:  (Neuronal network dynamics)

  • 87.19.lj
87.19.ln (Oscillations and resonance) 87.19.L- (Neuroscience)