Alpha节律谱分裂现象的研究  

A STUDY OF POWER DENSITY SPECTRA OF SPLIT-ALPHA RHYTHEM

作　　者：熊红川[1] 尧德中[1] 

机构地区：[1]电子科技大学生命科学与技术学院,成都610054

出　　处：《生物物理学报》2005年第4期301-306,共6页Acta Biophysica Sinica

基　　金：国家自然科学基金项目(90208003);高等学校博士学科点专项科研基金;教育部青年教师奖励计划

摘　　要：脑电图信号的功率谱分布是研究脑功能的一种重要手段。Alpha频段波峰的分裂是在少数健康人中观测到的一种现象。通过对皮层丘脑模型(corticothalamic model)的仿真计算,文中认为非均匀延时是产生alpha节律功率密度谱分裂的基础,而皮层与丘脑间的反馈连接的强度变化则是分裂现象只在少数人中观测到的重要原因。EEG （electroencephalogram） power spectra is an important tool studying the functions of brain. Splitting of the alpha spectral peak is a phenomenon observed in a small group of the healthy population. By a simulation study of the corticothalamic model, this paper supposed that the non-uniform time delay was the base of the alpha spectra peak split, and the variety of the cortico-thalamic feedback connection strength was the main reason that the splitting phenomena appeared only in a small group of the population.

关 键 词：alpha节律 功率密度谱 皮层丘脑模型 连接强度 

分 类 号：Q421[生物学—神经生物学]