VISION: ELECTROPHYSIOLOGY OF THE RETINA
T. TOMZTA
I. Introduction
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11. Electroretinogram
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A. Electroretinogram as a Mass Response
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B. Component Analysis of Electroretinogram
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C. Localization of Electroretinogram Components
111. Response of Single Ganglion Cells .
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A. Response Types . . . .
B. Receptive Field .
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IV. Response of Photoreceptors
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A. Early and Late Receptor Potential
B. Response of Single Photoreceptors
V. Responses in the Inner Nuclear Layer
A. S Potential .
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B. Responses in Other Cell Types .
VI. Retinal Mechanisms of Color Vision
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I. INTRODUCTION
The retina responds to light and signals its presence and pattern to the
brain by way of the optic nerve. Information of the surroundings entering the eye mediated by light is first caught by the photopigments in
rods and cones and transmitted to the ganglion cells through a complex
neural network as shown in Fig. 1. The recent rapid development of
electron microscopic techniques has contributed a great deal to the
elucidation of ultrafine structures of retinal cells and synaptic contacts
between them (Villegas, 1960; Villegas and Villegas, 1963; Sjostrand,
1961; Yamada and Ishikawa, 1965; Stell, 1965; Dowling and Boycott,
1966; Dowling and Werblin, 1969). The morphology shows that the
organization of the neural network is much the same in all the verte33