利用生物声纳中双耳多普勒效应探讨定量神经编码  

Investigation on Quantitative Neural Coding Based on Binaural Doppler Effect in Biosonar

作　　者：钱鸣奇[1,2] 覃曦[2,3] 刘淑芳[2,3] 张宏[1,2] 童勤业[1,2,3] 

机构地区：[1]浙江大学生物医学工程教育部重点实验室,杭州310027 [2]浙江大学生物医学工程系,杭州310027 [3]浙江大学神经信息学中心,杭州310027

出　　处：《中国生物医学工程学报》2010年第2期195-200,共6页Chinese Journal of Biomedical Engineering

基　　金：国家重点基础研究发展(973)计划(5132103ZZT21B);国家重大基础研究专项基金(2002CCA01800);国家自然科学基金资助项目(60871085)

摘　　要：为了探讨不稳定的生物神经系统检测变化信号的方法,以及变化信号与神经系统输出脉冲的定量关系,本研究基于神经元模型(H-H方程),用计算机仿真研究生物声纳对双耳多普勒效应的处理机制。双耳多普勒效应差可以确定运动物体的运动方向,由于双耳检测到的频率差别非常小,因此神经系统必须具有很高的信号分辨能力。本研究的仿真分析结果,证明神经系统存在高灵敏地区分多普勒信号的可能性,讨论了神经系统实现"定量"处理的可能性。To investigate the method to measure the variable signals by the unstable nervous system,and the quantitive relation between the variable signals and the output spikes of the nervous system,this paper studies the binaural doppler effect processing model of biosonar based on H-H equations and computer simulation.Movement orientation of object can be detected using difference of doppler effect between two ears.Because of the frequency difference caused by binaural Doppler effect is very small,which calls for the nervous system must have the high-sensitivity（resolving power）.According to the simulating results,it seemed that there was indeed possible to achieve high-sensitivity distinction small change of signal.The possibility that information processing in neural system was quantitative was discussed.

关 键 词：多普勒效应 生物声纳 神经编码 序空间 圆映射 

分 类 号：Q61[生物学—生物物理学]