Stell W K, Lightfoot D O
J Comp Neurol. 1975 Feb 15;159(4):473-502. doi: 10.1002/cne.901590404.
In Golgi preparations of goldfish retina we have observed three types of horizontal cell which receive exclusively from cones and one which receives exclusively from rods. The cone horizontal cells were designated H1, H2 and H3, in order of increasing dendritic spread, increasing separation from the outer synaptic layer, decreasing size of perikaryon, and decreasing density of cone contacts. Slender appendages with knobby terminal enlargements project horizontal cells by alalyzing serial 1 mum sections with the light microscope. The probable inputs, in terms of visual pigments in the cones which contact them, are: H1, red+green+blue; H2, green+blue; H3, blue. Analysis of previously published work suggests (1) that H1 cells generate monophasic or L-type responses, H2 cells generate biphasic or C1-type responses, and H3 cells generate triphasic or C2-type responses; (2) that H1 cells receive direct functional input at least from red-sensitive cones, H2 cells from green-sensitive cones, and H3 cells from blue-sensitive cones, and (3) that H1 constitute pathways from cones to H2 cells, and H2 cells, and H2 cells constitute pathways from cones and H1 cells to H3 cells. The precise location and route of the transfers, from H1 to H2 and from H2 to H3, are not yet known.
在金鱼视网膜的高尔基染色标本中，我们观察到三种仅从视锥细胞接收信号的水平细胞类型，以及一种仅从视杆细胞接收信号的水平细胞类型。视锥水平细胞按树突扩展程度增加、与外突触层距离增加、胞体大小减小以及视锥细胞接触密度减小的顺序被命名为H1、H2和H3。通过光学显微镜分析连续的1微米切片发现，带有瘤状末端膨大的细长附属物从水平细胞伸出。就与其接触的视锥细胞中的视觉色素而言，可能的输入情况为：H1，红+绿+蓝；H2，绿+蓝；H3，蓝。对先前发表的研究进行分析表明：（1）H1细胞产生单相或L型反应，H2细胞产生双相或C1型反应，H3细胞产生三相或C2型反应；（2）H1细胞至少从红敏视锥细胞接收直接功能输入，H2细胞从绿敏视锥细胞接收输入，H3细胞从蓝敏视锥细胞接收输入；（3）H1细胞构成从视锥细胞到H2细胞的通路，H2细胞构成从视锥细胞和H1细胞到H3细胞的通路。从H1到H2以及从H2到H3的传递的确切位置和途径尚不清楚。
