Schoppmann A, Hoffmann K P
Exp Brain Res. 1979 May 2;35(3):495-510. doi: 10.1007/BF00236767.
Single unit recordings from 220 units were obtained from the nuclei praetectalis anterior (NPA) and posterior (NPP) of 30 immobilized, anesthetized cats. Quantitative analysis of pretectal (PT) visual activity was mainly based on recordings from the NPP. For comparison, 160 collicular (CS) neurons were studied. A strong sensitivity for moving objects was evident in both samples. The following main types of PT activity were categorized: (A) slow movement, direction-selective units (21%); (B) slow movement, nondirection-selective units (19%); (C) units nonselective for stimulus velocity and direction (24%); (D) jerk movement selective, nondirection-selective units (36%). Latency measurements following single shocks to optic chiasm (OX) and tract (OT) showed mainly slow conducting fiber input to the PT and CS which can be divided into two different groups by conduction properties and synaptic delay: direct W-input and delayed W-input. Fast Y-fiber input of both types, direct and indirect, was recorded at both sites, PT and CS.
从30只固定、麻醉的猫的前顶盖前核（NPA）和后顶盖前核（NPP）获取了220个单位的单细胞记录。顶盖前区（PT）视觉活动的定量分析主要基于NPP的记录。为作比较，研究了160个丘系（CS）神经元。在两个样本中，对移动物体都有很强的敏感性。PT活动主要分为以下几种类型：（A）慢运动、方向选择性单位（21%）；（B）慢运动、非方向选择性单位（19%）；（C）对刺激速度和方向无选择性的单位（24%）；（D）急动运动选择性、非方向选择性单位（36%）。对视交叉（OX）和视束（OT）单次电击后的潜伏期测量表明，主要是传导速度慢的纤维输入到PT和CS，根据传导特性和突触延迟可分为两个不同的组：直接W输入和延迟W输入。在PT和CS两个部位都记录到了直接和间接两种类型的快速Y纤维输入。
