通过一种新型静态随机点立体图分析视差诱发电位。
The analysis of disparity evoked potentials by a new form of static random-dot stereograms.
作者信息
Hou C, Zhang X, Fang Q, Shou T, Zeng L, Yan M, Zhou Y, Hu B, Li P
机构信息
Department of Ophthalmology, First Teaching Hospital, West China University of Medical Sciences, Chengdu, China.
出版信息
Yan Ke Xue Bao. 1995 Mar;11(1):48-52.
PURPOSE
A new form of static random-dot stereograms free of monocular clues was designed as stimulus to elicit disparity evoked potentials.
METHODS
Disparity evoked potentials were recorded in 40 stereo-normal subjects. The stimulator was a white-black static random-dot stereograms generated by a computer and had no monocular clues. Every subject was tested in disparity stimulus, zero disparity stimulus, monocular stimulus and wearing prism condition.
RESULTS
A characteristic wide positive wave at about 250 ms was consistently recorded in disparity stimulus, which may be regarded as evidence of the presence of stereopsis. In contrast, recordings for zero disparity stimulus, monocular vision, stimulus and wearing prism condition all demonstrated a markedly difference from recording for disparity stimulus.
目的
设计一种新型的无单眼线索的静态随机点立体图作为刺激，以引出视差诱发电位。
方法
对40名立体视觉正常的受试者记录视差诱发电位。刺激器是由计算机生成的黑白静态随机点立体图，无单眼线索。每位受试者分别在视差刺激、零视差刺激、单眼刺激和戴棱镜条件下进行测试。
结果
在视差刺激中始终记录到一个约250毫秒的特征性宽正波，这可被视为存在立体视觉的证据。相比之下，零视差刺激、单眼视觉、刺激和戴棱镜条件下的记录与视差刺激下的记录均有明显差异。
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