Department of Ophthalmology and Visual Science, Yokohama City University, Graduate School of Medical Sciences, Fukuura, Kanazawa-ku, Yokohama, Japan.
Clin EEG Neurosci. 2012 Oct;43(4):303-11. doi: 10.1177/1550059412445608.
We investigated the neurophysiological correlates of stereoscopic 3-dimensional (3-D) depth perception by studying human visual evoked potentials (VEPs) with an integral imaging method characterized by horizontal but not vertical disparity. The VEPs were recorded in 10 healthy men under 4 conditions. In condition I, stimuli A (flat, 2-dimensional [2-D] image) and B (concave 3-D image) were presented at random. In condition II, stimuli A and C (convex 3-D image) were presented at random. In condition III, stimuli B and C were presented at random. In condition IV, stimuli A, B, and C were presented at random. The data for flat VEPs to stimulus A were combined in conditions I and II. The data for concave VEPs to stimulus B were combined in conditions I and III. The data for convex VEPs to stimulus C were combined in conditions II and III. When 2-way analysis of variance (ANOVA) for 2 factors, stimulus conditions (flat VEPs, concave VEPs, and convex VEPs) and electrode positions, was applied for VEP data, the N1 and N2 peak amplitudes differed significantly among the 3 stimulus conditions. In condition IV, the N1 peak amplitudes differed significantly among the 3 stimuli. Multiple comparisons followed by Bonferroni adjustment did not detect differences in the N1 peak amplitude between stimuli A and B, between stimuli A and C, or between stimuli B and C. We concluded that VEPs to concave or convex 3-D stimuli were significantly different from VEPs to flat 2-D stimuli. This is the first report showing modulation of human VEPs in 3-D perception with an integral imaging method.
我们通过研究具有水平但无垂直视差的积分成像方法的人类视觉诱发电位（VEP），研究了立体 3 维（3-D）深度感知的神经生理学相关性。在 4 种条件下记录了 10 名健康男性的 VEP。在条件 I 中，随机呈现刺激物 A（平面，2 维[2-D]图像）和 B（凹面 3-D 图像）。在条件 II 中，随机呈现刺激物 A 和 C（凸面 3-D 图像）。在条件 III 中，随机呈现刺激物 B 和 C。在条件 IV 中，随机呈现刺激物 A、B 和 C。将条件 I 和 II 中对刺激物 A 的平面 VEP 数据进行组合。将条件 I 和 III 中对刺激物 B 的凹面 VEP 数据进行组合。将条件 II 和 III 中对刺激物 C 的凸面 VEP 数据进行组合。当对 VEP 数据应用 2 个因素（刺激条件[平面 VEP、凹面 VEP 和凸面 VEP]和电极位置）的 2 因素方差分析（ANOVA）时，N1 和 N2 峰振幅在 3 种刺激条件之间存在显著差异。在条件 IV 中，3 种刺激之间的 N1 峰振幅存在显著差异。Bonferroni 调整后的多重比较未检测到刺激物 A 和 B、刺激物 A 和 C 或刺激物 B 和 C 之间的 N1 峰振幅差异。我们得出结论，凹面或凸面 3-D 刺激的 VEP 与平面 2-D 刺激的 VEP 显著不同。这是第一篇使用积分成像方法报告 3-D 感知中人类 VEP 调制的研究。
