Psychophysiological study on mental strain and eye-movements

本研究的目的在于探讨如何应用眼电测量方法来评估工业工人的困倦和疲劳心理生理状况，并探讨其安全性和舒适性。EOG的测量相对容易适用于人类执行各种任务。EOG的组成部分包括眨眼、扫视、慢眼运动（SEM），可以提供关于人的疲劳和其他心理生理状态的各种信息。在本项目的研究1中，我们进行了实验检验，以明确EOGs作为睡意测量的使用。在相对静态、单调的“听讲”情境下，记录eeg、显性行为和主观报告。在相关分析的结果中，扫描电镜对检测强烈的睡意或“瞌睡”很有用。眨眼持续时间与主观困倦程度呈正相关。在接下来的研究（研究2）中，将EOG指标应用于长途夜间行车。记录EOG， EEG（脑电图），ECG（心电图），视频图像（驾驶员的前视和行为），与前车的距离（红外仪器测量）。在午夜至清晨期间，眨眼时间增加，同时伴有主观困倦和辅助行为的增加，随后在许多情况下自发休息或小睡。交通状况是影响眨眼和扫视频率的主要因素。然而，当交通状况单调时，强烈的睡意与眨眼和扫视频率的显著减少有关。结果表明，结合观察眨眼持续时间和频率、水平眼电、交通状况、辅助行为对驾驶员睡意的评价是有益的。在研究3中，将研究中开发的方法和工具应用于一名长期夜班的专业卡车司机。结果显示，在连续的夜间工作中，困倦感增强。少

Purpose of this study is to develop the methods to apply the EOG (electro-oculogram) measures for psychophysiology of sleepiness and fatigue concerning safety and comfort in industrial workers. Measurements of EOG are relatively easily applicable for human performing various tasks. Components of EOG including eye-blinking, saccades, slow eye movements (SEM) may provide various information about fatigue and other psychophysiological states of human.In the research 1 of this project, experimental examination was performed to clarify the usage of EOGs as a measure for sleepiness. EOG, overt behavior and subjective reports were recorded in relatively static and monotonous situation of "hearing a lecture". In the results of correlation analyses, the SEM was useful to detect the strong level of sleepiness or "dozen-off'. Eye-blink- durations showed positive correlation to the level of subjective sleepiness.In the next research (research 2), EOG indices were applied to long-haul overnight tru … More ck driving. EOG, EEG (electroencephalogram), ECG (electrocardiogram), video-images (forward view and behavior of the driver), distance from the car ahead (measured by infrared instruments) were recorded. Increase of eye-blink-duration was observed in the time of midnight to early morning, accompanied by the increase in subjective sleepiness and subsidiary behavior, and followed by spontaneous break or nap in many cases. Traffic condition was the main factor which affects the frequencies in eye-blinking and saccades. However, strong sleepiness was related to a remarkable decrease in the frequencies of eye-blinking and saccades when the traffic condition was monotonous. Results indicate that the combination of observation of duration and frequencies in eye-blinking, horizontal-EOG, and traffic conditions, subsidiary behavior is useful to evaluate the driver's sleepiness.In the research 3, methods and tools developed in these researches were applied to a professional truck-driver in permanent night work. Results showed enhancement of sleepiness during the succession of night work. Less