《中国康复理论与实践》

《中国康复理论与实践》 ›› 2006, Vol. 12 ›› Issue (03): 185-187.

• 专题 •    下一篇

面孔感知过程中的视觉完形负波

楚向丽1,2; 王荫华1; 王玉平2   

  1. 1.北京大学第一医院神经内科 北京市 100034;2.首都医科大学附属宣武医院神经内科 北京市 100053
  • 收稿日期:2006-02-26 出版日期:2006-03-25 发布日期:2006-03-25

Visual Completion Negativity to Human Face Perception

CHU Xiang-li, WANG Yin-hua, WANG Yu-ping   

  1. Department of Neurology, First Hospital of Peking University, Beijing 100034, China
  • Received:2006-02-26 Published:2006-03-25 Online:2006-03-25

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被引次数

15

摘要： 目的探讨大脑对不完整面孔进行视觉完形加工的神经基础。方法视觉刺激分两类:完整面孔图片和不完整面孔图片(遮盖了面孔的左上象限),随机呈现,在受试者完成性别判断作业的同时记录头皮事件相关电位。结果与完整面孔相比,不完整面孔在枕颞区诱发出了明显增大的N1波,并且存在着右侧偏侧化优势;与完整面孔相比,不完整面孔诱发的N2波的峰潜伏期延长。结论增大的N1与视觉完形加工有关,视觉完形加工需要消耗时间。

关键词: 事件相关电位(ERP), 面孔认知, N1, 视觉完形

Abstract: ObjectiveTo explore the neural basis of visual completion for the occluded faces.Methods2 types of visual stimuli were presented randomly: pictures of complete faces,pictures of incomplete faces(the occluded part was the left-top quadrant).Subjects were instructed to perform a gender discrimination task while event-related potentials(ERPs) were recorded.ResultsCompared with complete faces,incomplete faces enhanced the amplitude of N1 on the occipito-temporal scalp bilaterally,with the right hemisphere advantage.The peak latency of N2 elicited by incomplete faces was delayed compared with that of complete faces.ConclusionThe enhancement of N1 is related to visual completion processing that requires additional time.

Key words: event-related potentials(ERP), face perception, N1, visual completion