法医学杂志 ›› 2021, Vol. 37 ›› Issue (5): 632-638.DOI: 10.12116/j.issn.1004-5619.2020.201004

• 论著 • 上一篇    下一篇

不同部位损伤致视力障碍的视觉诱发电位特征

戴定坤1(), 杨丽2, 孟欢欢2,3(), 陈溪萍2(), 陶陆阳2   

  1. 1.苏北人民医院司法鉴定所,江苏 扬州 225001
    2.苏州大学法医学系(司法鉴定中心),江苏 苏州 215123
    3.济宁医学院法医学与医学检验学院法医系,山东 济宁 272000
  • 收稿日期:2020-10-09 发布日期:2021-10-25 出版日期:2021-10-28
  • 通讯作者: 孟欢欢,陈溪萍
  • 作者简介:孟欢欢,女,博士研究生,讲师,主检法医师,主要从事法医临床学鉴定与研究;E-mail:mhhlinda@163.com
    陈溪萍,女,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:xipingchen@suda.edu.cn
    戴定坤(1985—),男,硕士研究生,主检法医师,主要从事法医临床学鉴定与研究;E-mail:307811956@qq.com
  • 基金资助:
    国家自然科学基金面上资助项目(81971800);济宁医学院教师科研扶持基金资助项目(JY2017FY005)

Characteristics of Visual Evoked Potential in Different Parts of Visual Impairment

Ding-kun DAI1(), Li YANG2, Huan-huan MENG2,3(), Xi-ping CHEN2(), Lu-yang TAO2   

  1. 1.Judicial Appraisal Institute of Northern Jiangsu People's Hospital, Yangzhou 225001, Jiangsu Province, China
    2.Department of Forensic Medicine (Institute of Forensic Sciences), Soochow University, Suzhou 215123, China
    3.Department of Forensic Medicine, Institute of Forensic Medicine and Laboratory Medicine, Jining Medical University, Jining 272000, Shandong Province, China
  • Received:2020-10-09 Online:2021-10-25 Published:2021-10-28
  • Contact: Huan-huan MENG,Xi-ping CHEN

摘要: 目的

研究视觉传导通路不同部位损伤后单眼视力障碍的视觉诱发电位(visual evoked potential,VEP)定量及定性差异。

方法

选取外伤致单眼视力损害受试者91名,根据损伤原因和解剖节段分为眼内屈光介质-视网膜损伤组(简称“眼球损伤组”)、视神经损伤组、中枢脑损伤组和颅内合并损伤组,分别记录受试者图形翻转视觉诱发电位(pattern-reversal visual evoked potential,PR-VEP)P100和闪光视觉诱发电位(flash visual evoked potential,F-VEP)P2波的峰时及波幅,采用SPSS 26.0统计软件分析4组受试者定量(峰时及波幅)及定性(阈值VEP频数、异常波形类别及频数)指标的差异性。

结果

眼球损伤组PR-VEP P100波及视神经损伤组F-VEP P2波呈现伤眼较健眼峰时延长、波幅降低的特征性差异(P<0.05),中枢脑损伤组和颅内合并损伤组健眼PR-VEP波幅在多个空间频率下较眼球损伤组健眼波幅降低(P<0.05)。眼球损伤组和视神经损伤组与颅内合并损伤组达到阈值的VEP P波频数之间差异均有统计学意义(P<0.008 3)、与中枢脑损伤组在波幅异常降低频数上差异有统计学意义(P<0.008 3)。

结论

VEP可区分中枢损伤与外周损伤、外周损伤中的眼球损伤与神经损伤,但无法区分颅内单纯损伤与复杂损伤,为定位视力障碍损伤部位的进一步研究提供了基础数据和依据。

关键词: 法医学, 眼球损伤, 视神经损伤, 脑损伤, 颅内合并伤, 视力障碍, 视觉诱发电位

Abstract: Objective

To study the quantitative and qualitative differences of visual evoked potential (VEP) in monocular visual impairment after different parts of visual pathway injury.

Methods

A total of 91 subjects with monocular visual impairment caused by trauma were selected and divided into intraocular refractive media-injury group (eyeball injury group for short), optic nerve injury group, central nervous system injury and intracranial combined injury group according to the injury cause and anatomical segment. Pattern Reversal visual evoked potential (PR-VEP) P100 peak time and amplitude, Flash visual evoked potential (F-VEP) P2 peak time and amplitude were recorded respectively. SPSS 26.0 software was used to analyze the differences of quantitative (peak time and amplitude) and qualitative indexes (spatial frequency sweep-VEP acuity threshold, and abnormal waveform category and frequency) of the four groups.

Results

Compared with healthy eyes, the PR-VEP P100 waveforms of the intraocular eyeball injury group and the F-VEP P2 waveforms of the optic nerve group showed significant differences in prolonged peak time and decreased amplitude in injured eyes (P<0.05). The PR-VEP amplitudes of healthy eyes were lower than those of injured eyes at multiple spatial frequencies in central nervous system injury group and intracranial combined injury group (P<0.05).The amplitude of PR-VEP in patients with visual impairment involving central injury was lower than that in patients with eye injury at multiple spatial frequencies. The frequency of VEP P waveforms reaching the threshold of the intraocular injury group and the optic nerve injury group were siginificantly different from the intracranial combined injury group, respectively(P<0.008 3), and the frequency of abnormal reduction of VEP amplitude of threshold were significantly different from the central nervous system injury group, respectively(P<0.008 3).

Conclusion

VEP can distinguish central injury from peripheral injury, eyeball injury from nerve injury in peripheral injury, but cannot distinguish simple intracranial injury from complex injury, which provides basic data and basis for further research on the location of visual impairment injury.

Key words: forensic medicine, eyeball injury, optic nerve injury, cortex injury, intracranial combined injury, visual dysfunction, visual evoked potential

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