The visual motion detectors underlying ocular following responses in monkeys
The visual motion detectors underlying ocular following responses in monkeys
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DOI：
10.1016/j.visres.2005.10.021
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发表时间：
2006-03-01
期刊：
影响因子：
1.8
通讯作者：
Miles, FA
中科院分区：
文献类型：
--
作者：
Miura, K;Matsuura, K;Miles, FA
心理物理学的证据表明，视觉运动可以通过低层次（基于能量）和高层次（基于特征）的机制来感知。目前的实验进行，以确定这些机制介导的初始眼跟随反应（OFR），可以引起在超短lavery突然运动的大视场图像。我们使用了Sheliga、Chen、Fitzgills和Miles的方法（人类的初始眼部跟随：对一阶运动能量的反应。Vision Research，2005 a），他研究了人类的初始OFR，研究了猴子的初始OFR。因此，我们将水平运动应用于：（1）缺乏基频（“缺失基频刺激”）的垂直方波光栅和（2）由频率3f和4f的两个正弦波之和组成的垂直光栅图案，其产生具有拍频f的重复图案。这两种视觉刺激都有一个关键的特性：当受到1/4波长的步长时，它们的整体图案（特征）在步长的方向上移动，而它们的主要傅立叶分量在相反的方向上移动（因为空间混叠）。我们发现，猴子对这些刺激的初始OFR，像人类一样，总是在与1/4波长偏移相反的方向上，即，在主要傅立叶分量的方向上，与如在运动分析的公知能量模型中通过（低级）定向的空间-时间滤波器的检测一致。我们的数据表明，运动探测器介导的初始OFR在猴子和人类有定量相似的属性，这表明猴子提供了一个很好的动物模型，为人类OFR。(c)2005爱思唯尔有限公司保留所有权利。
Psychophysical evidence indicates that visual motion can be sensed by low-level (energy-based) and high-level (feature-based) mechanisms. The present experiments were undertaken to determine which of these mechanisms mediates the initial ocular following response (OFR) that can be elicited at ultra-short latencies by sudden motion of large-field images. We used the methodology of Sheliga, Chen, Fitzgibbon, and Miles (Initial ocular following in humans: A response to first-order motion energy. Vision Research, 2005a), who studied the initial OFRs of humans, to study the initial OFRs of monkeys. Accordingly, we applied horizontal motion to: (1) vertical square-wave gratings lacking the fundamental ("missing fundamental stimulus") and (2) vertical grating patterns consisting of the sum of two sinusoids of frequency 3f and 4f, which created a repeating pattern with beat frequency, f. Both visual stimuli share a critical property: when subject to 1/4-wavelength steps, their overall pattern (feature) shifts in the direction of the steps, whereas their major Fourier component shifts in the reverse direction (because of spatial aliasing). We found that the initial OFRs of monkeys to these stimuli, like those of humans, were always in the opposite direction to the 1/4-wavelength shifts, i.e., in the direction of the major Fourier component, consistent with detection by (low-level) oriented spatio-temporal filters as in the well-known energy model of motion analysis. Our data indicate that the motion detectors mediating the initial OFR have quantitatively similar properties in monkeys and humans, suggesting that monkeys provide a good animal model for the human OFR. (c) 2005 Elsevier Ltd. All rights reserved.