Development of EFRP (Eye-Fixation-Related-Potential) real time analysis System

眼球运动记录显示了一个类似step-1的模式，包括眼球跳动（saccades）和当被试注视某物时眼睛的注视。这种与特殊事件相关的脑电位被称为眼固定相关电位（EFRP），它可以通过平均眼跳终止时的脑电图获得。我们已经完成了一个分析EFRP的新系统的原型。该系统的独特之处在于，我们可以在受试者移动眼睛的情况下测量ERP。该系统可以对头部14个城市的脑电图数据进行sI识别平均处理，并实时显示与大脑活动相关的地形图。该系统已申请专利。我们在几个条件下测试了这个系统。用新系统处理了14个城市的脑电图。照明水平降低了。当一个实验对象在看一幅画时，他的名字就会被喊出来以分散他的注意力。我们可以实时观察到EFRP图在视觉条件变化时的连续变化。当注意力被听觉刺激分散时，一些受试者表现出地形图的变化。同时，我们正在研究与该系统相关的许多感知和注意的基本问题。

Eye movement record shows a step-1 ike pattern consisting of saccadic eye movements (saccades) and eye fixationswhen a subject Iooks at something. This speciaI event reIated brain potentiaIs is called the eye fixation related potential (EFRP), which can be obtained with averaging EEGs at terminations of saccades. We have completed a prototype of the new system for analyzing the EFRP. The distinctive feature of the system is that we can measure the ERP under the conditions where a subject moves eyes. This systemcanprocess EEGdata from 14cites onthe headwith a sI idingaveragemethod and can dispIay the topographical map related to the brain activities in real time. The system has been applied for a patent.We tested the systemunder severaI conditions. EEGs from 14cites were processedwith the new system. The Iighting level was lowered. While a subject looked at a picture, his namewas called to distract his attention. We could observe the continuous variations of the map of EFRP in real time, when visual conditions varied. Some subjects showed the change in the topographical map, when their attention was distracted by the auditory stimuli. Simultaneously, we are doing research on many basic problems of perception and attention related to the system.