Straube A, Robinson F R, Fuchs A F
Department of Neurology, Ludwig-Maximilians University, Munich, Germany.
Invest Ophthalmol Vis Sci. 1997 Dec;38(13):2810-6.
To investigate the influence of repeated saccades and of background illumination on the metrics and dynamics of visually guided targeting saccades.
Eye movements were measured by magnetic search coil technique in seven trained monkeys (Macaca mulatta) while they performed many visually guided saccades in the dark or in dim background light.
After 2000 to 7000 saccades in the dark, peak eye velocity on the average decreased by 20%, saccadic gain decreased slightly by 4.5%, and saccadic latency increased by 15%. All parameters also showed increased variability. In contrast, when testing was done in dim light, there was little to no change in average saccadic metrics and latency.
The changes in saccadic metrics and dynamics in the dark do not reflect a change of the ocular plant but may reflect a change in the cortical or cerebellar influences on the brain stem burst generator linked to the monkeys attentional state. Background light mostly prevents this change.
研究重复扫视以及背景光照对视觉引导的目标性扫视的指标和动力学的影响。
通过磁搜索线圈技术测量了7只经过训练的猕猴（恒河猴）的眼动，这些猕猴在黑暗或昏暗背景光下进行了多次视觉引导的扫视。
在黑暗中进行2000至7000次扫视后，平均峰值眼速下降了20%，扫视增益略有下降4.5%，扫视潜伏期增加了15%。所有参数的变异性也有所增加。相比之下，在昏暗光线下进行测试时，平均扫视指标和潜伏期几乎没有变化。
黑暗中扫视指标和动力学的变化并不反映眼动系统的改变，而是可能反映了与猴子注意力状态相关的皮质或小脑对脑干爆发发生器影响的变化。背景光大多可防止这种变化。
