Natural Sciences Section, Department of Medical Lifescience, College of Medicine, The Catholic University of Korea, Seoul 137-701, Korea.
Korean J Physiol Pharmacol. 2010 Dec;14(6):413-7. doi: 10.4196/kjpp.2010.14.6.413. Epub 2010 Dec 31.
To understand the function of edges in perception of moving objects, we defined four questions to answer. Is the focus point in visual motion detection of a moving object: (1) the body or the edge of the object, (2) the leading edge or trailing edge of the object, (3) different in scotopic, mesopic and photopic luminance levels, or (4) different for colored objects? We measured the Optomotor Response (OMR) and Edge Triggering Response (ETR) of goldfish. We used a square and sine wave patterns with black and red stripes and a square wave pattern with black and grey stripes to generate OMR's and ETR's in the goldfish. When we used black and red stripes, the black leading edges stimulated an ETR under scotopic conditions, red leading edges stimulated an ETR under photopic conditions, and both black and red leading edges stimulated an ETR under mesopic luminance levels. For black and gray stripes, only black leading edges stimulated an ETR in all three light illumination levels. We observed less OMR and ETR results using the sine wave pattern compared to using the square wave pattern. From these results, we deduced that the goldfish tend to prefer tracking the leading edge of the pattern. The goldfish can also detect the color of the moving pattern under photopic luminance conditions. We decided that ETR is an intriguing factor in OMR, and is suitable as a method of behavioral measurement in visual system research.
为了理解边缘在运动物体感知中的作用，我们定义了四个问题来回答。在检测运动物体的视觉运动时，焦点是：（1）物体的主体还是边缘，（2）物体的前缘还是后缘，（3）在暗视、中间视和明视亮度水平下是否不同，还是（4）对不同颜色的物体是否不同？我们测量了金鱼的光感受器运动反应（OMR）和边缘触发反应（ETR）。我们使用了带有黑色和红色条纹的正方形和正弦波图案，以及带有黑色和灰色条纹的正方形波图案，以在金鱼中产生 OMR 和 ETR。当我们使用黑色和红色条纹时，黑色前缘在暗视条件下刺激 ETR，红色前缘在明视条件下刺激 ETR，而黑色和红色前缘在中间视亮度水平下都刺激 ETR。对于黑色和灰色条纹，只有黑色前缘在所有三种光照条件下都能刺激 ETR。与使用正方形波图案相比，正弦波图案的 OMR 和 ETR 结果较少。从这些结果中，我们推断金鱼倾向于跟踪图案的前缘。金鱼在明视亮度条件下也可以检测到运动图案的颜色。我们认为 ETR 是 OMR 中的一个有趣因素，适合作为视觉系统研究中行为测量的一种方法。
