| narrow-field bistratified amacrine cell | Perry (Perry) | We have observed cells in vertical sections with the same morphology as the bistratified rod amacrine cells described by Famiglietti & Kolb (1975) in the cat retina. A similar cell type has been described by Cajal (1893) in a number of mammls and by Boycott & Dowling (1969) in the primate retina, but all these authors called the cell a narrow-field diffuse cell. Famiglietti & Kolb (1975) have shown that this cell is bistratified with respect of its synaptic connections. Our cells have a mean soma size of 9.0 micrometers (range 8.5-10 micrometers; N = 16). A single large dendrite arises from the cell and apsses a short way into the inner plexiform layer before branching into two more dendrites (see figure 6, plate 2, and figure 16). When viewed in vertical sections the dendrites form a cone in the inner plexiform layer, with the boradest extent at hte level of the ganglion cell. At their broadest extend the dendritic fields are 30 micrometers in diameter (range 20-40 micrometer; N = 16). These cells have large knobs on the cell soma and proximal dendrites, and the knobs of the dendritic tree in the inner part of the inner plexiform layer are smaller. The large proximal knobs have been identified as presynaptic to ganglion cells in the cat retina, while the inner dendrites are postsynaptic to the rod bipolar cells (Famiglietti & Kolb 1975). | synonim | | AII-amacrines in the rat retina were first described by Perry and Walker ('80) from Golgi-staining.The second type of amacrine cell revealed by PVi immunocytochemistry was much more numerous, and from its morphological appearance (Fig. 2B) we were convinced that we had stained the AII-population. | Wassle H, Grunert U & Rohrenbeck J | Mihail Bota |
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