摘要
空间飞行条件下,失重可能对航天员脑高级功能产生不可预期的影响,而事件相关电位(event-related potentials,ERPs)是探索这种影响的重要手段。ERPs总是淹没在自发脑电中,信噪比很低。少次甚至单次提取ERPs,可减少刺激次数,同时可观察每次实验ERPs之间的变异性,具有重要意义。本文主要从时域、变换域和空间域来述快速提取ERPs的方法,并对这3种典型方法进行仿真比较。
On the space flight condition,weightlessness has unexpected effects on brain advanced function of astronauts,and event-related potentials（ERPs） are regarded as important means to probe into the effects.ERPs are always submerged in EEG,and signal to noise ratio of ERPs is greatly low.Extraction of ERPs signals from only a few trials or even one trial is significantly important,which can not only decrease the number of trials to be collected,but also supply one possible approach to observe the variation of different ERPs trials.This paper reviews the methods to extract ERPs from time domain,frequency domain,then space domain,and then three typical methods are simulated and compared.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2012年第2期147-151,共5页
Space Medicine & Medical Engineering
基金
航天医学基础与应用国家重点实验室资助项目(SMFA09A16)
关键词
事件相关电位
快速提取
时域法
变换域法
空域法
event-related potentials
fast extraction
time domain method
frequency domain method
space domain method
