Identification of the interplexiform cell in the dace retina by dye-injection method.

The responses of interplexiform cells in the dace retina were recorded intracellularly and identified morphologically. The response pattern closely resembles the response of bipolar cells and amacrine cells (on- and off-types). Morphologically, the perikaryon of most of these cells lies in the amacrine cell layer, and is usually large in size. Distal and proximal processes arise from the soma directly. The distal process ramifies and extends widely in the outer plexiform layer, but does not make contact with receptor terminals. The proximal process branches and extends widely in the inner plexiform layer. The majority of these cells resembles the dopaminergic interplexiform cells, but a few resemble the glycinergic interplexiform cells in the goldfish retina.