基于脑电信号溯源分析的观看3D电视导致大脑疲劳研究  

Research on Mental Fatigue Caused by Watching 3DTV Based on EEG Signal Tracing Analysis

作　　者：李健[1] 陈国镇[1] 陈春晓[1] 

机构地区：[1]南京航空航天大学生物医学工程系,南京211106

出　　处：《中国生物医学工程学报》2017年第1期46-52,共7页Chinese Journal of Biomedical Engineering

基　　金：国家自然科学基金(61171059)

摘　　要：随着3D电视显示技术的普及,观看3D电视产生的大脑疲劳问题越来越受到关注。初步探讨长时间观看3D电视导致大脑疲劳的机理。采集20名受试者(男女比例1∶1)分别连续观看1 h 3D或2D影片前后各5 min的脑电信号,并使用主观疲劳问卷量表评估被试观看前后的疲劳状况。利用希尔伯特变换的方法,分析脑电各通道信号之间的同步性,探讨脑电信号的空间特性,并对观看2D/3D电视前后脑电信号进行溯源分析。主观疲劳问卷量表评估发现,长时间观看3D电视大脑会出现显著疲劳症状(P<0.01)。脑电信号溯源分析发现,长时间观看2D/3D电视后大部分脑区各频段电流源密度有所减小,但统计结果无显著性差异(P>0.05)。然而,观看3D电视后,枕叶在β2频段电流源密度显著增强(P<0.01),且观看3D电视后枕叶显著增强部分与主观疲劳因子显著相关(P<0.01)。观看3D电视后与观看2D电视后相比,缘上回(BA40),枕叶(BA18,BA19)和中央后回(BA3)等与空间视觉信息处理相关区域在β1频段电流密度分布显著增强(P<0.05),处于相对较活跃状态。因此,研究结果可以推测,长时间观看2D/3D电视后大脑会出现疲劳症状,相比观看2D电视,观看3D电视会加大枕叶和缘上回等局部脑区的处理负担,这可能是长时间观看3D电视更容易产生脑疲劳的原因。With the popularization of 3DTV display technological,the mental fatigue caused by watching 3DTV is getting more and more attention. This paper aimed to explore the mental fatigue preliminary mechanism caused by prolonged watching of 3DTV. Five-minute EEG signals and subjective fatigue questionnaire forms from twenty subjects（ sex ratio 1： 1） were collected separately before and after one-hour watching of 2D /3DTV.Hilbert transform was utilized to analyze the EEG signals＇ synchronism and spatial characteristics in different channels. Furthermore,the signal tracing analysis was used to localize the source of EEG activity. Based on the results of subjective fatigue questionnaire,significant mental fatigue was found one hour after watching 3DTV（ P〈0. 01）. Results indicated that the current density at the source was mostly reduced after watching 2D/3DTV with no significant differences（ P〉0. 05）. However,the current density of β2frequency band was significantly increased at occipital lobe after watching 3DTV（ P〈0. 01）,which was also greatly correlated to the subjective fatigue factor（ P〈0. 01）. Meanwhile,the current density of β1frequency band was significantly increased（ P〈0. 05） after watching 3DTV at supramarginal gyrus（ BA40）,occipital lobe（ BA18,BA19）and posterior central gyrus（ BA3）,which were related to the visual spatial information processing,compared with that of watching 2DTV. As a result,the brain would be in a state of fatigue after prolonged watching of2 D /3DTV. Compared with watching 2DTV,watching 3DTV would increase the burden of some local regions,such as occipital lobe and supramarginal gyrus,which might explain why it is easier to cause mental fatigue when watching 3DTV.

关 键 词：3D电视 脑电 希尔伯特变换 脑疲劳 信号溯源分析 

分 类 号：R318[医药卫生—生物医学工程]