Comparison between four- and single-channel recording of normal multifocal visual evoked potential
- VernacularTitle:正常人多焦视觉诱发电位的四通道与单通道记录比较
- Author:
Yan LIU
;
Dezheng WU
- Publication Type:Journal Article
- Keywords:
Evoked potential, visual
- From:
Chinese Journal of Ocular Fundus Diseases
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
objective To observe the differences between four- and single-channel recording of normal multifocal visual evoked potential (mfVEP). Methods mfVEP of 35 health individuals (70 eyes) were detected by both four- and single-channel recording with VERIS apparatus. The root mean square (RMS) value of reactive amplitude was obtained from the results of the two kinds of recording. Each stimulated patch was analyzed to compare the variational degree of each patch between the two recording methods. Responases asymmetry coefficient (RAC) was introduced to evaluate the symmetry property between the two eyes in an individual. Results Compared with the single-channel recording,the responses of the stimulated patches of the four-channel recording were increased statistically, with most of the patches below the horizontal meridian and some of patches in the upper field, and there was distinct symmetry property between the two eyes in the same individual recorded by four-channel recording. Conclusion The four-channel recording is better than the single one and could be clinically applied and popularized.
