Winterkorn J M
Brain Res. 1975 Dec 26;100(3):523-41. doi: 10.1016/0006-8993(75)90156-0.
(1) This study was designed to test the ability of cats with lesions of the superior colliculus-pretectum to discriminate between stimuli which are widely separated in space. (2) Intact cats and cats learning or relearning after lesions of the superior colliculus-pretectum, were trained on light-dark (LD) and horizontal-vertical stripe (HV) discriminations in a V-maze, where the stimuli were widely separated in space, or in a divided straight maze, where the stimuli were side by side. (3) Two types of errors were scored: door-push errors when the cat pushed open the incorrect door; alley-entrance errors when the cat entered the incorrect alley, but turned and entered the correct alley without having pushed the incorrect door. (4) In the V-maze as well as in the straight maze, cats with lesions of the superior colliculus-pretectum achieved criterional performance by alley-entrance and door-push scoring on LD and HV discriminations. Thus, cats with lesions of the superior colliculus-pretectum can locate or orient to widely separated visual stimuli well enough to discriminate between them from a distant choicepoint. (5) Cats with lesions of the superior colliculus-pretectum generally committed a larger number and higher percentage of alley-entrance errors during learning than unoperated cats in either maze. However, commission of alley-entrance errors was not further increased in the V-maze, where the stimuli were widely separated in space. (6) All unoperated cats committed alley-entrance errors as well as door-push errors suggesting that commission of alley-entrance errors may reflect a normal process in two-choice learning.
(1) 本研究旨在测试上丘-顶盖前区受损的猫区分在空间上相距甚远的刺激的能力。(2) 对上丘-顶盖前区受损后正在学习或重新学习的完整猫和猫，在V型迷宫中进行明暗（LD）和水平-垂直条纹（HV）辨别训练，其中刺激在空间上相距甚远，或者在分隔的直迷宫中进行训练，其中刺激并排排列。(3) 记录两种类型的错误：当猫推开错误的门时的推门错误；当猫进入错误的通道，但在没有推开错误的门的情况下转身进入正确通道时的通道入口错误。(4) 在V型迷宫以及直迷宫中，上丘-顶盖前区受损的猫通过在LD和HV辨别上的通道入口和推门计分达到了标准表现。因此，上丘-顶盖前区受损的猫能够很好地定位或朝向相距甚远的视觉刺激，以便从远处的选择点区分它们。(5) 上丘-顶盖前区受损的猫在学习过程中，在两种迷宫中通常比未手术的猫犯下更多数量和更高百分比的通道入口错误。然而，在刺激在空间上相距甚远的V型迷宫中，通道入口错误的发生率并未进一步增加。(6) 所有未手术的猫都犯下了通道入口错误以及推门错误，这表明通道入口错误的发生可能反映了双选学习中的一个正常过程。
