Roberts D K, Noda H
Exp Neurol. 1986 Sep;93(3):631-41. doi: 10.1016/0014-4886(86)90182-2.
The significance of the parafoveal region in processing information about target velocity to initiate ocular pursuit was evaluated by making a small paracentral scotoma in monkeys trained to pursue a slowly moving target. In the experimental paradigms in which the image had to cross the scotoma, the small retinal lesion (greater than 2 degrees) gave a direct effect upon the ability of monkeys to pursue the target motion. The abnormal pursuit was characterized by a marked reduction of eye velocity. Evaluated from the initial portion of the pursuit immediately following the first corrective saccade, the eye velocity was as low as 50 to 60% of the target velocity. The abnormality was more pronounced in slow pursuit (15 to 20 degrees/s) than in fast pursuit (25 degrees/s). The data indicated that the small retinal region at the boundary of the macula plays an important role in sampling target velocity during the initial part of smooth-pursuit eye movement.
通过在训练有素的猴子身上制造一个小的旁中心暗点来评估旁中央凹区域在处理目标速度信息以启动眼球追踪方面的重要性，这些猴子被训练追踪缓慢移动的目标。在图像必须穿过暗点的实验范式中，小的视网膜病变（大于2度）对猴子追踪目标运动的能力产生了直接影响。异常追踪的特征是眼球速度明显降低。从第一次矫正扫视后立即开始的追踪初始部分评估，眼球速度低至目标速度的50%至60%。这种异常在慢速追踪（15至20度/秒）中比在快速追踪（25度/秒）中更为明显。数据表明，黄斑边界处的小视网膜区域在平滑追踪眼球运动的初始阶段对目标速度采样中起着重要作用。
