Takeda Y, Sugai M, Yagi A
Department of Psychology, Kwansei Gakuin University, Uegahara, Nishinomiya, 662-8501, Hyogo, Japan.
Int J Psychophysiol. 2001 Apr;40(3):181-6. doi: 10.1016/s0167-8760(00)00185-9.
The eye fixation related potential (EFRP) associated with the occurrence of fixation pauses can be obtained by averaging EEGs at termination of saccades. EFRP is a kind of ERP measurable at the eye movement situation. Variations of EFRP were examined during a proof reading task for a long time. Two paragraphs of sentences were presented on the left and the right sides of a CRT. The paragraph on one side had some irrelevant words. Ten subjects were asked to detect the irrelevant words. The task started at 09.20 h and finished at 16.00 h and consisted of five blocks. The duration of each block was 1-h task and 10-min rest including a lunch (70 min). EEG and EOG were recorded during the task. EEGs were averaged at termination of saccades to obtain EFRP. EFRP showed little changes during the morning blocks. However, the mean amplitude between 100 and 200 ms of the positive component in the last two blocks decreased significantly compared with other blocks. The error rate, the performance and the score of fatigue increased at the end of the task. EFRP would reflect decline of mental concentration (i.e. carelessness) caused by visual fatigue.
与注视停顿发生相关的眼动注视相关电位（EFRP）可通过在扫视终止时对脑电图进行平均来获得。EFRP是一种在眼动情况下可测量的事件相关电位。在长时间的校对任务中对EFRP的变化进行了检查。在阴极射线管（CRT）的左侧和右侧呈现两段句子。其中一侧的段落中有一些无关单词。要求10名受试者检测这些无关单词。任务于09:20开始，16:00结束，包括五个时段。每个时段包括1小时任务和10分钟休息（含70分钟午餐时间）。在任务过程中记录脑电图和眼电图。在扫视终止时对脑电图进行平均以获得EFRP。EFRP在上午的时段中变化不大。然而，与其他时段相比，最后两个时段中正向成分在100至200毫秒之间的平均振幅显著降低。任务结束时错误率、表现和疲劳得分增加。EFRP将反映由视觉疲劳引起的精神集中度下降（即粗心大意）。
