法医学杂志

法医学杂志 ›› 2011, Vol. 27 ›› Issue (5): 327-329.DOI: 10.3969/j.issn.1004-5619.2011.05.003

• 论著 • 上一篇    下一篇

注视程度对视诱发电位检查结果的影响

耿文静，王广勇，方  超，竞花兰   

  1. （中山大学 中山医学院法医病理教研室，广东 广州 510080）
  • 发布日期:2011-10-25 出版日期:2011-10-28
  • 通讯作者: 通信作者：竞花兰，女，教授，硕士研究生导师，主要从事法医病理学、法医临床学研究；E-mail：jinghl@mail.sysu.edu.cn
  • 作者简介:耿文静（1986—），女，山东烟台人，硕士研究生，主要从事法医临床学、法医病理学研究；E-mail：villion1986@126.com

Influence of Visual Attention in Visual Evoked Potential Examination

GENG WEN-JING, WANG GUANG-YONG, FANG CHAO, JING HUA-LAN   

  1. （Department of Forensic Pathology, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China）
  • Online:2011-10-25 Published:2011-10-28

被引次数

6

摘要： 目的 探讨法医临床鉴定视诱发电位（visual evoked potential，VEP）检测中注视程度对结果的影响。 方法 选取110名视力或矫正视力正常（视力范围为4.8~5.2）、年龄在20~30岁的受试者作为实验对象，分别进行图形视诱发电位（pattern visual evoked potential，PVEP）和闪光视诱发电位（flash visual evoked potential，FVEP）检查。PVEP检查要求受试者以下述3种注视方式进行：正视屏幕中央图像（同时默数黑白方格交替变化的次数以提高受试者的注意力）、正视屏幕中央图像但同时思考其他问题、斜视屏幕下方一角（检查左眼时左眼斜视屏幕左下角，检查右眼时右眼斜视屏幕右下角）。FVEP检查要求受试者分别在睁眼与闭眼状态进行。记录P100波的潜伏期和波幅，采用SPSS 13.0进行多组定量数据的比较。 结果 PVEP检查3种注视方式的P100波潜伏期和波幅差异均有统计学意义，FVEP检查睁眼与闭眼状态P100波的潜伏期和波幅比较差异均有统计学意义。 结论 VEP虽然是一种客观的检测视功能的电生理学方法，仍可受到注视程度等人为因素的干扰，应引起司法鉴定人的注意。

关键词: 法医学, 诱发电位, 视觉, P100波, 注视程度

Abstract: Objective To explore the influence of visual attention in visual evoked potential（VEP） examination. Methods The pattern visual evoked potential （PVEP） and flash visual evoked potential （FVEP） were used to examine 110 normal subjects whose visual acuity or corrected visual acuity is in the range of 4.8-5.2, and age between 20 to 30 years old. In PVEP inspection, subjects were asked to watch with three ways, to stare at the central screen （at the same time count silently the number of alternating of black and white squares to improve the subjects’ attention）, to stare at the central screen at the same time thinking other things, to look sideways （the left eye stared at the left bottom corner of the screen or the right eye stared at the right one）. In FVEP inspection, subjects were checked with eyes open and closed respectively. The latency and amplitude of P100 wave were recorded. The data were statistically analyzed by SPSS 13.0 software. Results In PVEP inspection, the latency and amplitude of P100 wave were statistically different among three watching ways. In FVEP inspection, latency and amplitude of P100 wave were statistically different between eyes open and closed group. Conclusion Although the visual evoked potential test is an objective electrophysiological visual function test, it is susceptible to the influence of various subjective factors such as visual attention. It should arise the attention of forensic experts.

Key words: forensic medicine, evoked potentials, visual, P100 wave, visual attention

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