DIFFERENT PROGRAMMING MODES OF HUMAN SACCADIC EYE-MOVEMENTS AS A FUNCTION OF STIMULUS ECCENTRICITY - INDICATIONS OF A FUNCTIONAL SUBDIVISION OF VISUAL-FIELD
DIFFERENT PROGRAMMING MODES OF HUMAN SACCADIC EYE-MOVEMENTS AS A FUNCTION OF STIMULUS ECCENTRICITY - INDICATIONS OF A FUNCTIONAL SUBDIVISION OF VISUAL-FIELD
复制标题
DOI：
10.1007/bf00344150
复制
发表时间：
1976-01-01
影响因子：
1.9
通讯作者：
POPPEL, E
中科院分区：
文献类型：
--
作者：
FROST, D;POPPEL, E
自愿扫视眼球运动对闪光的水平子午线，其持续时间和距离固定点是不同的，眼球运动进行了测量，使用直流眼电图。目标在10度以内。15.degree.偏心率通常通过1次扫视眼球运动达到。当眼睛转向超过10 °的目标时，15.degree.偏心率，第一扫视眼球运动以通常不超过10 °的角度落在目标上。在这样的下冲之后，离开中央凹的目标的图像（视觉误差信号）的存在引起在短间隔之后的校正扫视（通常是一次），其将目标的图像放置在中央凹上。扫视眼球运动似乎是在视网膜坐标中编程的。不管眼睛在眼眶中的初始位置如何，对于眼睛运动到10 °以内和10 °以外的目标存在不同的编程模式。15.degree.并且扫视眼球运动的最大速度总是在25 °处达到。30.degree.目标偏心率潜伏期和眼扫视间隔（ISI）的分布经常是多模态的，模式之间的间隔为30-40 ms。眼扫视运动可能是由以30 Hz的频率处理视觉信息的机制产生的。矫正性扫视可以在极短的间隔（30-60 ms）之后发生，而不管是否存在视觉错误信号;眼睛在这些非常短的扫视间隔期间甚至可能不会完全停止。
Voluntary saccadic eye movements were made toward flashes of light on the horizontal meridian, whose duration and distance from the point of fixation were varied; eye movements were measured using DC electrooculography. Targets within 10.degree.-15.degree. eccentricity were usually reached by 1 saccadic eye movement. When the eyes turned toward targets of more than 10.degree.-15.degree. eccentricity, the 1st saccadic eye movement fell short of the target by an angle usually not exceeding 10.degree.. The presence of the image of the target off the fovea (visual error signal) subsequent to such an undershoot elicited, after a short interval, corrective saccades (usually one) which placed the image of the target on the fovea. Saccadic eye movements appeared to be programmed in retinal coordinates. Irrespective of the initial position of the eyes in the orbit, there were different programming modes for eye movements to targets within and beyond 10.degree.-15.degree. from the fixation point, and the maximum velocity of saccadic eye movements was always reached at 25.degree.-30.degree. target eccentricity. Distributions of latency and intersaccadic interval (ISI) were frequently multimodal, with a separation between modes of 30-40 ms. Saccadic eye movements may be produced by mechanisms which, at a frequency of 30 Hz, process visual information. Corrective saccades may occur after extremely short intervals (30-60 ms) regardless of whether or not a visual error signal is present; the eyes may not even come to a complete stop during these very short intersaccadic intervals.