INTERMITTENT STIMULATION BY LIGHT : VI. AREA AND THE RELATION BETWEEN CRITICAL FREQUENCY AND INTENSITY.
INTERMITTENT STIMULATION BY LIGHT : VI. AREA AND THE RELATION BETWEEN CRITICAL FREQUENCY AND INTENSITY.
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DOI：
10.1085/jgp.19.6.979
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发表时间：
1936-07-20
期刊：
影响因子：
--
通讯作者：
Smith EL
中科院分区：
文献类型：
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作者：
Hecht S;Smith EL
1. 在视网膜中，直径小于2°的中心区域仅具有视锥细胞，而较大的区域则具有视杆细胞和视锥细胞。与此一致，临界融合频率与强度的关系对于低于 2° 的中心固定区域是单函数，对于类似固定的较大区域是双函数。这些数据的两个部分很容易被识别为低强度下的视杆细胞活动和高强度下的视锥细胞活动。 2. 描述杆数据的曲线对于所有区域都是相同的，仅在控制曲线在坐标轴上的位置的相关尺寸常数的值上有所不同。同样，所有区域的锥体数据曲线都是相同的；最大频率随面积增加的趋势仅仅是确定数据在频率轴上的位置的常数值的表达。因此，面积不会影响每个接收器系统的闪烁关系的基本性质，而仅改变该关系的无关常数。 3. 描述测量结果的曲线由两个方程表示，一个用于棒，一个用于锥；这两个方程都是从描述感光过程中初始事件的稳态导出的。
1. In the retina, central areas whose diameter is less than 2° possess only cones, while larger areas have rods and cones. In conformity with this, the relation of critical fusion frequency to intensity is a single function for centrally fixated areas below 2°, and a double function for similarly fixated, larger areas. The two sections of such data are easily identified with rod activity at low intensities and with cone activity at high intensities. 2. The curves describing the rod data are the same for all areas, differing only in the values of the associated dimensional constants which control the location of the curves on the coordinate axes. Similarly, the curves for the cone data are the same for all areas; the tendency for an increase in maximal frequency with area is the expression merely of the value of a constant which determines the position of the data on the frequency axis. Area, therefore, does not influence the fundamental nature of the flicker relation through each receptor system, but merely alters the extraneous constants of the relation. 3. The curves which describe the measurements are represented by two equations, one for rods and one for cones; both equations are derived from the stationary state descriptive of the initial event in the photoreceptor process.