A Study of Light and Electron Microscopy of the Neural Basis for Diurnal and Nocturnal Vision.

摘要

Morphological evidence has been found for the distinction of different types of photoreceptors in the diurnal and nocturnal bird retina, as well as for the color differences of the lipidic droplets found in each type. A single type of horozontal cell with axon has been found in both diurnal and nocturnal bird retina. This observation, in disagreement with the accepted description by Cajal, is of relevance in that (1) it harmonizes with the structure of all tetrapoda retinae, and (2) it necessitates a precise knowledge of the cell population of the outer plexiform layer to interpret electrophysiological data. The organization of the outer plexiform layer is discussed in detail.