Influence of background luminance on visual sensitivity during saccadic eye movements
Influence of background luminance on visual sensitivity during saccadic eye movements
复制标题
背景亮度对眼球扫视时视觉灵敏度的影响
DOI：
10.1007/bf00237797
复制
发表时间：
2004
影响因子：
2
通讯作者：
J. T. Lum
中科院分区：
文献类型：
--
作者：
Dr. B. A. Brooks;D. M. Impelman;J. T. Lum
在扫视眼球运动之前、期间和之后，测量投射在均匀背景上的短暂测试闪光的检测阈值。在扫视过程中阈值升高的量和持续时间直接取决于背景亮度;在低于或等于2.0 log fl的背景下没有显著升高。在注视过程中，当背景"扫视"移位时，也得到了类似的结果。在较高的背景亮度（无测试闪光）下，记录了与眼动和背景移位相关的枕叶诱发电位。这些结果可能表明激活选定的神经元群体-可能是"Y"通道-这发生在照明环境中的扫视期间，并且使得通道对附加的、同时的和适当结构的刺激的响应较低。
SummaryDetection thresholds were measured for a brief test flash projected on a uniform background before, during, and after saccadic eye movement. The amount and duration of threshold elevation during saccades was directly dependent on background illumination; no significant elevations occurred at backgrounds of ¯2.0 log fl or less. Similar results were obtained during fixation when the backgrounds were “saccadically” displaced.An occipital evoked potential was recorded in association with both eye movements and background displacements at higher background luminances (no test flash). These results may indicate an activation of a selected population of neural elements — probably the “Y” channels — which occurs during saccades in illuminated environments and which renders the channels less responsive to additional, simultaneous, and appropriately structured stimuli.