法医学杂志 ›› 2022, Vol. 38 ›› Issue (3): 355-359.DOI: 10.12116/j.issn.1004-5619.2020.200406

• 论著 • 上一篇    下一篇

应用视觉事件相关电位Nogo-P3评定屈光不正眼的视敏度

贾富全1,2(), 张馨元1, 罗方亮1, 熊妍荷1, 程龙龙1, 刘技辉1()   

  1. 1.中国医科大学法医学院,辽宁 沈阳 110122
    2.内蒙古医科大学基础医学院,内蒙古 呼和浩特 010059
  • 收稿日期:2020-04-08 发布日期:2022-06-25 出版日期:2022-06-28
  • 通讯作者: 刘技辉
  • 作者简介:刘技辉,男,教授,博士研究生导师,主要从事法医临床学鉴定与研究;E-mail:jhliu@cmu.edu.cn
    贾富全(1979—),男,博士,主要从事法医临床学鉴定与研究;E-mail:jiafuquan915@163.com
  • 基金资助:
    国家重点研发计划子课题资助项目(2016YFC0800701-4-2)

Evaluation of Visual Acuity of Ametropia with Visual Event-Related Potential Nogo-P3 Component

Fu-quan JIA1,2(), Xin-yuan ZHANG1, Fang-liang LUO1, Yan-he XIONG1, Long-long CHENG1, Ji-hui LIU1()   

  1. 1.School of Forensic Medicine, China Medical University, Shenyang 110122, China
    2.School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, China
  • Received:2020-04-08 Online:2022-06-25 Published:2022-06-28
  • Contact: Ji-hui LIU

摘要:

目的 分析视敏度加工过程中事件相关电位(event-related potential,ERP)的Nogo-P3,为视敏度的客观评定提供电生理学依据。 方法 选择除屈光不正外无其他眼病的受试者26名,双眼裸眼视力均为0.1,选用不同视角大小、不同开口方向的“E”图形作为刺激图片,ERP实验采用视觉Go/Nogo范式,Go刺激视角为1°15′,Nogo刺激视角分别为1°15′、55′、24′、15′,对被试者裸眼视力进行测试,分析Nogo-P3的特征。 结果 Nogo-P3潜伏期在Nogo刺激视角1°15′与55′、Nogo刺激视角24′与15′相比,差异无统计学意义;Nogo刺激视角1°15′与24′、15′相比,差异有统计学意义(P<0.05);Nogo刺激视角55′与24′、15′相比,差异有统计学意义(P<0.05)。Nogo-P3波幅在各Nogo刺激视角间差异无统计学意义。 结论 在Go/Nogo范式下,Nogo-P3能够反映被试者对Nogo刺激的认知反应,可用于视敏度的客观评估。

关键词: 法医学, 事件相关电位, 视觉, Nogo-P3, 视敏度, 屈光不正, 潜伏期, 波幅

Abstract:

Objective To analyze the Nogo-P3 component of event-related potential (ERP) in the process of visual acuity processing, to provide electrophysiological evidence for objective evaluation of visual acuity. Methods Twenty-six subjects with no other ocular diseases except for ametropia were recruited, and all subjects had uncorrected visual acuity both eyes 1/10 (evaluated using Monoyer chart). Block letter E with different visual angles and directions were used as graphic stimuli. The Go/Nogo paradigm was used for ERP studies. The visual angle of Go stimulation angle was 1°15′, Nogo stimuli were 1°15′, 55′, 24′ and 15′. The visual acuity test was performed on each of the two naked eyes separately in all subjects, and the characteristics of the Nogo-P3 component were analyzed. Results The latency of Nogo-P3 showed no difference between the stimuli of 1°15′ and 55′, and between Nogo stimulation angle 24′ and 15′. There was significant difference between Nogo stimulation angle 1°15′ and 24′, and between Nogo stimulation angle 1°15′ and 15′ (P<0.05). There was significant difference between Nogo stimulation angle 55′ and 24′, and between Nogo stimulation angle 55′ and 15′ (P<0.05). No significant differences were observed in the Nogo-P3 amplitude among Nogo stimulation. Conclusion In the Go/Nogo paradigm, Nogo-P3 can reflect the cognitive response of subjects to Nogo stimulation, which can be used for objective evaluation of visual acuity.

Key words: forensic medicine, event-related potential, vision, Nogo-P3, visual acuity, ametropia, latency, amplitude

中图分类号: