RODS CANCEL CONES IN FLICKER
RODS CANCEL CONES IN FLICKER
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DOI：
10.1038/235173a0
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发表时间：
1972-01-01
期刊：
影响因子：
64.8
通讯作者：
MACLEOD, DIA
中科院分区：
文献类型：
--
作者：
MACLEOD, DIA
人的视网膜有两个独立的感受器系统。视锥细胞在相对较强的照明下工作得最好，是日光视觉的基础。在昏暗的照明（暗视觉）中，我们仅依赖于视杆细胞感受器，视杆细胞感受器系统的局限性在我们的视觉感觉特征中是显而易见的：在暗视觉条件下，颜色缺失，轮廓模糊，细节丢失。在中间（中间视觉）照明水平，出现了一个有趣的情况：杆系统和锥系统同时活跃，它们产生的信号在视觉感觉的产生中结合联合收割机。除非这些视杆细胞和视锥细胞的信号相互破坏性地干扰，否则如果视杆细胞或视锥细胞能够单独发出中间视觉光刺激的信号，则中间视觉光刺激必须是可见的。对闪光可见度的实验1已经得出了与这一规律相一致的结果;但是在下面的闪烁光实验中，这一规律就被打破了。
THE retina of man is equipped with two separate receptor systems. Cones, operating best in relatively strong illumination, are the basis of daylight (photopic) vision. In dim illumination (scotopic vision) we rely on rod receptors alone, and the limitations of the rod receptor system are apparent in the character of our visual sensations: in scotopic conditions colour is absent, outlines are blurred and detail is lost. At intermediate (mesopic) levels of illumination, an interesting situation arises: the rod system and the cone system are simultaneously active, and the signals that they generate combine in the production of visual sensations. Unless these rod and cone signals interfere destructively with one another, a mesopic light stimulus must be visible if either rods alone or cones alone could signal its occurrence. Experiments on the visibility of flashes1have yielded results consistent with this rule; but in the following experiments with flickering light, the rule breaks down.