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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。
In space flight, weight loss may have unpredictable effects on astronaut brain advanced functions, and event-related potentials (ERPs) are important means to explore this effect. ERPs are always submerged in spontaneous EEG and have a low signal-to-noise ratio. Less or even a single extraction of ERPs, can reduce the number of stimuli, while observing the variability of each experimental ERPs, of great significance. This paper mainly from the time domain, transform domain and space to describe the rapid extraction of ERPs method, and simulation of these three typical methods.