鞍-结分岔点附近的神经自发放电节律和随机自共振  

SPONTANEOUS FIRING RHYTHMS AND THE AUTONOMOUS STOCHASTIC RESONANCE NEAR SADDLE-NODE BIFURCATION IN NERVOUS SYSTEM

作　　者：张慧敏[1] 杨明浩[1] 化存才[1] 古华光 任维[1] 

机构地区：[1]云南师范大学数学学院 陕西师范大学生命科学学院

出　　处：《动力学与控制学报》2008年第4期332-336,共5页Journal of Dynamics and Control

基　　金：国家自然科学基金项目(1077210);(30770701);(10432010);国家高新技术研究发展计划(2007AA02Z310)资助项目~~

摘　　要：研究了确定的和随机的神经放电数学模型中的鞍-结分岔的动力学行为,随机模型中靠近鞍-结分岔点的随机节律被揭示为随机更新过程;还研究了相应于分岔点附近的随机自共振机制.结果不仅揭示了鞍-结分岔点附近的神经放电的统计特征和动力学机制,还给出了实用的鉴别现实神经系统中的鞍-结分岔的指标.Dynamical behaviors near saddle-node bifurcation point in nervous system,in both deterministic and stochastic neuronal model,were simulated. The characteristics of neural firing induced by noise were revealed and identified to be a stochastic renewal process. Correspondingly,the autonomous stochastic resonance induced by noise was also studied. The results not only reveal the dynamics and characteristics of firing patterns near the saddle-node bifurcation point,but also provide practical method to identify ...

关 键 词：鞍-结分岔 随机自共振 神经放电模式 Ⅰ型兴奋 

分 类 号：R311[医药卫生—基础医学]