Contrast sensitivity measured during smooth pursuit movement.
Contrast sensitivity measured during smooth pursuit movement.
复制标题
平滑追踪运动期间测量的对比敏感度。
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
Baichuan Jiang
中科院分区：
文献类型：
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作者：
L. Yumin;Baichuan Jiang
当追踪眼运动由以与漂移光栅相同的速度移动的光斑引导时，眼睛感知以与辅助光斑相同的速度移动的光栅所需的阈值对比度（TC）的倒数被定义为引导追踪对比灵敏度（GP-CS）。对于在1、2、4、8或16 Hz下的0.75、1.5、3、6和12 c/deg光栅漂移的25种可能组合中的20-21种，确定GP-CS和闪烁（F-）或运动-CS。直到约5度/秒的漂移速度，GP-CS接近静止光栅的模式识别（PR）-CS（+20至-40%），而F-CS显示出从低空间频率（SF）光栅到高空间频率（SF）光栅的比PR-CS更高（100-200%）至更低（30-60%）的系统值，如先前的研究者所发现的。当绘制光栅在2、4和8Hz漂移的GP-CSF并与相应的F-CSF对SF进行比较时，可以最容易地看到这些差异。GP-CSF的一般形状显示出与0 Hz下的PR-CSF的显著相似性，这通常被认为是由所谓的持续系统介导的。视运动觉不可避免地与GP相关。讨论了维持系统在运动感觉调节中的参与以及平滑追踪眼动中图形视觉的意义。
When pursuit eye movement is guided by a light spot which moves at the same velocity as that of a drifting grating, the reciprocal of the threshold contrast (TC) needed for the eye to perceive the grating moving at the same velocity as the auxiliary spot is defined as the guided pursuit contrast sensitivity (GP-CS). GP-CS and flicker (F-) or motion-CS are determined for 20-21 out of 25 possible combinations of 0.75, 1.5, 3, 6 and 12 c/deg grating drifting at 1, 2, 4, 8 or 16 Hz. Up to a drifting velocity of about 5 degrees/s, the GP-CS is near to the pattern recognition (PR)-CS for a stationary grating (+20 to -40%), while the F-CS shows systematic higher (100-200%) to lower (30-60%) values than the PR-CS from low to high spatial frequency (SF) gratings as found by previous investigators. These differences can be most easily seen when the GP-CSF's for gratings drifting at 2, 4 and 8 Hz are plotted and compared with the respective F-CSF's against SF. The general shape of the GP-CSF's shows remarkable similarity to that of PR-CSF at 0 Hz which is generally regarded to be mediated by the so-called sustained system. Apparent motion sensation is inevitably associated with GP. Participation of sustained system in the mediation of motion sensation and the implication of pattern vision during smooth pursuit eye movement are discussed.