SHARED PATHWAYS FOR ROD AND CONE VISION
SHARED PATHWAYS FOR ROD AND CONE VISION
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DOI：
10.1016/0042-6989(86)90108-2
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发表时间：
1986-01-01
期刊：
影响因子：
1.8
通讯作者：
LENNIE, P
中科院分区：
文献类型：
--
作者：
DZMURA, M;LENNIE, P
我们用落在10度颞侧视网膜上的异色光栅测量了中间视觉范围内孤立视杆和视锥系统的空间对比敏感度。当照明水平在该范围内升高时，杆系统的对比灵敏度增加，在20 scot处阅读约50的峰值（并提供6 c/deg的敏锐度）。td，于是杆系统开始饱和。在大多数中间视觉范围内，锥系统的灵敏度低于杆系统的灵敏度，尽管它提供了更好的敏锐度（高达15 c/deg）。在能够激发视杆和视锥系统的空间频率范围内，仅激发视杆的光栅与仅激发视锥的相同空间频率的光栅是不可区分的。此外，对比度适应的嫁接，激发杆或锥提高阈值光栅，激发杆或锥。从这些结果中，我们得出结论，从杆和锥的信号一起旅行的路径subserving低空间频率的检测，而只有信号从锥旅行的路径subserving高空间频率的检测。
We have used heterochromatic gratings fallings on 10 deg temporal retina to measure the spatial contrast sensitivities of the isolated rod and cone systems in the mesopic range. As the level of illumination was raised within this range, the contrast sensitivity of the rod system increased, reading a peak of about 50 (and providing an acuity of 6 c/deg) at 20 scot. td, whereupon the rod system began to saturate. Over most of the mesopic range the sensitivitiy of the cone system was lower than that of the rod system, although it provided better acuity (up to 15 c/deg). Within the range of spatial frequencies capable of exciting both rod and cone systems, a grating that excited only rods was indistinguishable from a grating of the same spatial frequency that excited only cones. Moreover, contrast adaptation to graftings that excited either rods or cones raised threshold for gratings that excited rods or cones. From these results we conclude that signals from rods and cones travel together in pathways subserving the detection of low spatial frequencies, while only signals from cones travel in pathways subserving the detection of high spatial frequencies.