法医学杂志

法医学杂志 ›› 2009, Vol. 0 ›› Issue (6): 409-411.

• 论文 • 上一篇    下一篇

时间频率对扫描图像视觉诱发电位视力的影响

刘瑞珏;陈捷敏;夏文涛;范利华;朱广友;   

  1. 司法部司法鉴定科学技术研究所上海市法医学重点实验室;复旦大学上海医学院法医学系;
  • 发布日期:2009-12-25 出版日期:2009-12-28

Effects of Temporal Frequency on the Sweep Pattern Visual Evoked Response Acuity

LIU RUI-JUE1, CHEN JIE-MIN1,2, XIA WEN-TAO1, FAN LI-HUA1, ZHU GUANG-YOU1 (1. SHANGHAI KEY LABORATORY OF FORENSIC MEDICINE, INSTITUTE OF FORENSIC SCIENCE, MINISTRY OF JUSTICE, P.R. CHINA, SHANGHAI 200063, CHINA; 2. DEPARTMENT OF FORENSIC MEDICINE, SHANGHAI   

  • Online:2009-12-25 Published:2009-12-28

被引次数

8

摘要： 目的研究不同时间频率条件下,扫描图像视觉诱发电位(sweep pattern visual evoked response,SPVER)视力的变化。方法受试者分为低视力组(71眼)与高视力组(92眼),应用一组空间频率进行刺激,时间频率分别为8.5、10、15、20Hz,根据测得的SPVER视力与主观视力比较,判断不同时间频率条件下测得的SPVER视力的准确性。结果在低视力组,应用该组空间频率,其SPVER视力与主观视力相关性较好;在高视力组,SPVER视力出现低估。在两组中,当时间频率均为10Hz时,SPVER视力与主观视力相关性较好。结论应用SPVER检查时,时间频率对检查结果有影响,法医学鉴定时应当重视时间频率的选择。

关键词: 法医学, 诱发电位, 视觉, 扫描图像, 视力, 时间频率

Abstract: Objective To investigate the changes of sweep pattern visual evoked response(SPVER) acuity in different temporal frequency. Methods The persons were collected and divided into the low visual acuity group(71 eyes) and the high visual acuity group(92 eyes). The eyes were stimulated with different temporal frequency(8.5 Hz, 10 Hz, 15 Hz and 20 Hz, respectively) and the same series of spatial frequency. The accuracy of SPVER acuity in different temporal frequency was evaluated by compare the SPVER acuity with the subjective vision. Results In the low visual acuity group, there was a good correlation be- tween the SPVER acuity and the subjective vision applying the spatial frequency of the group. In the high visual acuity group, the SPVER acuity was lower than the subjective vision. SPVER acuity showed a good correlation with the subjective vision at the temporal frequency of 10Hz in two groups. Conclusion The temporal frequency can influence SPVER accuracy, so it is necessary to select the suitable stimulation condition in forensic practice.

Key words: forensic medicine, evoked potentials, auditory, sweep pattern, vision, temporal frequency