大鼠视网膜的明适应机制。

Mechanisms of light adaptation in rat retina.

作者信息

Green D G, Powers M K

出版信息

Vision Res. 1982;22(2):209-16. doi: 10.1016/0042-6989(82)90120-1.

Abstract

Green, Dowling, Siegel and Ripps (1975) J. gen. Physiol. 65, 483-502 found that both receptors and post-receptoral elements regulate the process of light adaptation in skate retina. As a test of the generality of this conclusion, we repeated their experiments on the retina of the intact albino rat. Increment threshold and intensity-response functions of aspartate-isolated receptor potentials, ERG b-waves and single retinal ganglion cell axons were measured, and all were found to be similar to those described by Green et al. (1975). In particular, the adaptive properties of the b-wave and ganglion cells were similar to each other, but different from those of the receptor potential. We conclude that the retinal mechanisms of light adaptation are similar in rat and skate.

摘要

格林、道林、西格尔和里普斯（1975年，《普通生理学杂志》第65卷，第483 - 502页）发现，感受器和感受器后成分都参与调节鳐鱼视网膜的光适应过程。为了验证这一结论的普遍性，我们在完整的白化大鼠视网膜上重复了他们的实验。测量了天冬氨酸分离的感受器电位、视网膜电图b波和单个视网膜神经节细胞轴突的增量阈值及强度 - 反应函数，发现所有这些都与格林等人（1975年）所描述的相似。特别地，b波和神经节细胞的适应性特性彼此相似，但与感受器电位的不同。我们得出结论，大鼠和鳐鱼视网膜的光适应机制相似。