Schellart N A, Spekreijse H
J Gen Physiol. 1972 Jan;59(1):1-21. doi: 10.1085/jgp.59.1.1.
A cross-correlation technique has been applied to quantify the dependence of the dynamic characteristics of retinal ganglion cell responses in goldfish on intensity, wavelength, spatial configuration, and spot size. Both theoretical and experimental evidence justify the use of the cross-correlation procedure which allows the completion of rather extensive measurements in a relatively short time. The findings indicate the following. (a) The shape of the amplitude characteristics depends on the energy per unit of time (power) falling within the center of a receptive field rather than on the intensity of the stimulus spot. For spot diameters of up to 1 mm, identical amplitude characteristics can be obtained by interchanging area and intensity. Therefore the receptor processes do not contribute to the change in the amplitude characteristics as a function of the power of the stimulus light. (b) For high frequencies the amplitude characteristics obtained as a function of power join together in a common envelope if plotted on an absolute sensitivity scale. For spontaneous ganglion cells this envelope holds over a range of three log units and the shape is identical for central and peripheral processes. (c) The amplitude characteristics of the central and peripheral processes converging to a ganglion cell are identical, irrespective of the sign (on or off) and the spectral coding of the response. Therefore we have no evidence for interneurons in the goldfish retina unique to the periphery of the receptive field.
一种互相关技术已被应用于量化金鱼视网膜神经节细胞反应的动态特性对强度、波长、空间构型和光斑大小的依赖性。理论和实验证据都证明了互相关程序的使用合理性，该程序允许在相对较短的时间内完成相当广泛的测量。研究结果表明如下。(a) 幅度特性的形状取决于落入感受野中心的单位时间能量（功率），而不是刺激光斑的强度。对于直径达1毫米的光斑，通过互换面积和强度可获得相同的幅度特性。因此，感受器过程对作为刺激光功率函数的幅度特性变化没有贡献。(b) 对于高频，如果以绝对灵敏度标度绘制，作为功率函数获得的幅度特性会汇聚在一个共同的包络内。对于自发神经节细胞，这个包络在三个对数单位的范围内成立，并且中央和外周过程的形状相同。(c) 汇聚到神经节细胞的中央和外周过程的幅度特性相同，与反应的符号（开或关）和光谱编码无关。因此，我们没有证据表明金鱼视网膜中存在仅位于感受野外周的中间神经元。
