EFFECTS OF LIGHT AND DARK ENVIRONMENTS ON MACAQUE AND HUMAN FIXATIONAL EYE-MOVEMENTS
EFFECTS OF LIGHT AND DARK ENVIRONMENTS ON MACAQUE AND HUMAN FIXATIONAL EYE-MOVEMENTS
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DOI：
10.1016/0042-6989(87)90089-7
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发表时间：
1987-01-01
期刊：
影响因子：
1.8
通讯作者：
SNODDERLY, DM
中科院分区：
文献类型：
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作者：
SNODDERLY, DM
两个猕猴和两个人的眼睛位置被记录下来，而他们检测到的不可预测的调暗的固定点在黑暗或光明的环境。注视扫视通常具有复杂的波形，其由两个或更多个扫视位移的聚类而产生，没有中间漂移期。在黑暗中，所有受试者都有低频率的扫视集群（0.15-0.61/秒）。三个科目的频率增加扫视集群和减少位移的幅度时，在正常照明的实验室进行的任务。光线中较高的扫视频率并不会自动导致眼睛位置的较大分散。其中一个人的扫视频率最低，相对来说不受刺激条件的影响。刺激条件的变化对猕猴的注视眼球运动的影响比人类更明显。在黑暗中，猕猴的扫视主要是向下和鼻，但在光的扫视位移发生在更广泛的角度方向。平均眼位在黑暗中高于在光明中。当人类从黑暗环境切换到明亮环境时，他们的扫视位移方向几乎没有改变，并且没有改变他们的平均眼睛位置。照明环境的影响被解释为小凹和周边视网膜输入之间的相互作用。结果表明，注视扫视可能有一个以上的作用，也许包括刺激起源于周边视网膜的途径。这些外围场输入对猕猴的注视控制系统的影响比对人类的影响更大。
Eye position of two macaques and two humans was recorded while they detected the unpredictable dimming of a fixation spot in a dark or a light environment. Fixational saccades often had complex waveforms that resulted from clustering of two or more saccadic displacements with no intervening drift periods. In the dark, all subjects had low frequencies of saccade clusters (0.15-0.61/sec). Three of the subjects increased the frequency of saccade clusters and decreased the magnitude of the displacements when the task was performed in the normally lighted laboratory. The higher saccade frequencies in the light did not automatically result in greater dispersion of eye position. One of the humans, who had the lowest saccade frequency, was relatively unaffected by the stimulus conditions. The change in stimulus conditions had a more pronounced effect on the fixational eye movements of the macaques than the humans. In the dark, the macaques made saccades mostly down and nasal, but in the light the saccadic displacement occurred over a wider range of angular directions. Mean eye position was higher in the dark than in the light. The humans altered the direction of their saccadic displacements very little and did not change their mean eye position when they switched from a dark to a lighted environment. The influence of a lighted environment is interpreted as an interaction between foveolar and peripheral retinal inputs. The results suggest that fixational saccades may have more than one role, perhaps including stimulation of pathways originating in the peripheral retina. These peripheral field inputs have a stronger effect on the fixational control system of macaques than of humans.