视觉疲劳对事件相关电位中关联性负变的影响

发布时间：2018-03-05 07:48

本文选题：视觉疲劳　切入点：注意力　出处：《中国安全科学学报》2014年02期 　论文类型：期刊论文

【摘要】：为研究视觉疲劳对车辆驾驶人注意保持能力的影响,用自编主观疲劳调查表和关联性负变(CNV)经典试验范式,对被试在观看高速公路视频前和观看视频30 min后进行重复测试,考察被试观看高速公路视频前后的行为差异和CNV中早期成分(iCNV)和晚期成分(tCNV)的平均波幅差异。结果发现:被试观看高速公路视频后,主观疲劳调查表调查显示被试出现视觉疲劳状态;在CNV试验结果中,反应时延长,产生视觉疲劳;CNV以中央顶区为主,视觉疲劳后iCNV和tCNV成分波幅降低。这些结果表明,执行认知加工任务时,视觉疲劳会导致被试注意朝向能力下降、期待行为减弱,最终出现反应迟缓;CNV成分主要产生于额叶,幅值降低可能与额叶执行功能受损有关,iCNV和tCNV成分可以作为视觉疲劳的检测指标。
[Abstract]:In order to study the effect of visual fatigue on the attention retention ability of vehicle drivers, the subjects were tested repeatedly before and after 30 min of watching expressway video by using the self-compiled subjective fatigue questionnaire and the associated negative variable CNV classic test paradigm. The behavioral differences of the subjects before and after watching the expressway video and the average amplitude differences between the early and late components of CNV were investigated. The subjective fatigue questionnaire survey showed that the subjects had visual fatigue state, in the CNV test results, the reaction time was prolonged, the central apical region was dominant, and the amplitudes of iCNV and tCNV components were decreased after visual fatigue. While performing cognitive processing tasks, visual fatigue resulted in decreased attention orientation, decreased expectation, and eventually delayed response to CNV, which mainly occurred in the frontal lobe. The decrease of amplitude may be related to the damage of executive function in frontal lobe, and the components of iCNV and tCNV can be used as indicators of visual fatigue.
【作者单位】：南通大学心理科学研究所;南通大学管理学院;南通大学航海医学研究所;
【基金】：江苏省交通厅科技项目(10Y24)
【分类号】：X912.9;U492.8

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