Boman D K, Hotson J R
Department of Neurology, Santa Clara Valley Medical Center, San Jose, CA 95128.
Exp Brain Res. 1989;74(3):555-62. doi: 10.1007/BF00247357.
Perceived motion may be a stimulus for anticipatory slow eye movements. To test this possibility, the production of anticipatory slow eye movements in humans was studied using apparent motion stimuli. Short range apparent motion was produced with random dot stimuli and the anticipatory slow eye movements were isolated from the smooth pursuit responses by occasionally including trials in which the random dot stimulus did not appear. Long range apparent motion was produced with subjective contour stimuli. Both short range and long range apparent motion were found to be effective stimuli for anticipatory slow eye movements. The prominence of perceived motion was altered by changing the spatiotemporal displacement intervals in the short range apparent motion stimuli. Changing the subjective contours also changed the motion percepts of the long range apparent motion stimuli. With both stimuli, the peak anticipatory slow eye velocities that were achieved decreased as the prominence of the motion percepts decreased, while the time-course of the anticipatory responses were similar under the different conditions. These findings indicate that the expectation of perceived motion is necessary for anticipatory slow eye movements.
感知运动可能是预期性慢眼动的一种刺激。为了验证这种可能性，使用视动刺激对人类预期性慢眼动的产生进行了研究。用随机点刺激产生短程视动，并通过偶尔包含随机点刺激不出现的试验，将预期性慢眼动与平稳跟踪反应区分开来。用主观轮廓刺激产生长程视动。发现短程和长程视动都是预期性慢眼动的有效刺激。通过改变短程视动刺激中的时空位移间隔来改变感知运动的显著程度。改变主观轮廓也改变了长程视动刺激的运动感知。对于这两种刺激，随着运动感知显著程度的降低，所达到的预期性慢眼动峰值速度降低，而在不同条件下预期反应的时间进程相似。这些发现表明，感知运动的预期对于预期性慢眼动是必要的。
