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Science 18 April 1975:
Vol. 188. no. 4185, pp. 270 - 273
DOI: 10.1126/science.804181
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Articles

Science, Vol 188, Issue 4185, 270-273
Copyright © 1975 by American Association for the Advancement of Science

articles

Synaptic organization of the amine-containing interplexiform cells of the goldfish and Cebus monkey retinas

JE Dowling and B Ehinger

Fluorescence microscopy has revealed a new type of amine-containing retinal neuron, the interplexiform cell, that extends processes in both plexiform layers. After intravitreal injection of 5,6-dihydroxytryptamine in goldfish and Cebus monkey, the processes of these cells can be identified by electron microscopy. In goldfish, the processes are pre- and postsynaptic to amacrine cells in the inner plexiform layer and presynaptic to bipolar and horizontal cells in the outer plexiform layer. Interplexiform cells thus provide an intraretinal centrifugal pathway from inner to outer plexiform layers.


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