test of zone activity hypothesis II

我们记录了 CS 活动以及伴随的絮状浦肯野细胞的简单尖峰 (SS) 活动，这些细胞对麻醉猫的大视野视觉模式运动做出反应。根据方向选择性，我们将细胞分为两种主要类型：水平刺激和偏爱垂直刺激的垂直类型。水平型细胞的CS活性在记录部位对侧刺激时增加，在同侧刺激时减少，而垂直型细胞在向上刺激时增加，在向下刺激时减少。在这两种类型中，CS 响应在较低速度刺激下较大，并且在测试的高达 180 ﾟ/s 的较高速度刺激下响应保持良好。大多数水平型细胞受到向任意一只眼睛呈现的刺激的调节，并且主眼位于记录部位的同侧。大多数垂直型细胞也受到提供给任意一只眼睛的刺激的调节，两只眼睛之间没有明显差异。同侧眼的感受野始终包括中央区域，并在两个视觉半视野上广泛延伸。 CS 和 SS 响应是相反的，即当 CS 发射增加时，SS 发射减少，反之亦然。

We recorded the CS activity together with concomitant simple spike (SS) activity of the floccular Purkinje cells that responded to large-field visual pattern movement in the anesthetized cat. On the basis of the direction selectivity, we divided the cells into two major types : the horizontal stimuli and the vertical type that preferred vertical stimuli. The CS activity of the horizontal type cell increased during stimuli directed contralaterally to the recording site and decreased during ipsilaterally directed stimuli, while that of the vertical type cell increased during upward stimuli and decreased during downward stimuli. In both types, the CS response was larger at lower velocity stimuli, and the response was well maintained at higher velocity stimuli up to 180 ﾟ/s tested. The majority of the horizontal type cells were modulated by the stimuli presented to either eye, and the dominant eye was ipsilateral to the recording site. The majority of the vertical type cells were also modulated by the stimuli presented to either eye without obvious differences between two eyes. The receptive field of the ipsilateral eye always included the area centralis and extended widely on both visual hemifields. The CS and SS responses were reciprocal to each other, that is, when the CS firing increased, the SS firing decreased and vice versa.