不同运动图象同时刺激左右眼时的交替视动震颤(OKN)现象

采用了同时对左右眼分别以不同的运动图象刺激的实验方法,来测量及分析其OKN眼动反应,探索在OKN反映中两眼之间的输入关系以及眼动控制机制。实验结果发现在两眼的刺激图象不一致时,眼动反应为交替的OKN反应,即中枢神经系统根据各眼的刺激速度,交替地控制产生OKN眼动反应。本文还从闭环控制上讨论了视网膜上速度误差信号的作用。

THE ALTERNATE OPTOKINETIC NYSTAGMUS DURING SIMULTANEOUS STIMULATION BY THE DIFFERENT MOVING PATTERNS PRESENTED TO EACH EYE RESPECTIVELY

When the visual scene is moved in one direction through the field of view, a regular pattern of eye movements known as optokinetic nystagmus (OKN) is induced. In the present experiment, eye movements were studied with a special method, in which two different moving patterns were displayed on a split screen simultaneously, and each eye was stimulated with one of these patterns respectively. In these experiments, it is found that OKN is evoked alternately by the stimulus exposed to each eye. These indicate that the oculomotor syste m is controlled alternately by the velocity of moving pattern presented to each eye. The results are also discussed with aspects of the close loop control svstem and the error sienal of velocitv.