Early Morphological Differentiation of the Bipolar Neurons in the Chick Retina A Golgi Analysis

We report a histogenetic study of the bipolar cells of the chick embryo retina between days 5 and 9, using the Golgi technique. On day 8, at the level of the developing outer plexiform layer, small delicate spines appear on the outer processes of the bipolar cells, which represents the commencement of their dendritic ramification. At a later staige in development che detachment of Landolt's club from the outer limiting membrane is observed in some cells The inner ramifications of the bipolar cell, at the inner plexiform layer, appear later than those of the outer process.