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Science 13 September 1985:
Vol. 229. no. 4718, pp. 1107 - 1109
DOI: 10.1126/science.4035351
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Articles

Science, Vol 229, Issue 4718, 1107-1109
Copyright © 1985 by American Association for the Advancement of Science

articles

Responsiveness and receptive field size of carp horizontal cells are reduced by prolonged darkness and dopamine

SC Mangel and JE Dowling

In the fish retina the interplexiform cells contain dopamine and provide a centrifugal pathway from the inner plexiform layer to horizontal cells of the outer plexiform layer. Dopamine application reduced the responsiveness and receptive field size of cone horizontal cells, as did a prolonged period of complete darkness. Other results suggest that the interplexiform cells may release dopamine after a prolonged period in the dark. The interplexiform-horizontal cell system may modify the strength of the antagonistic surrounds of retinal neurons as a function of time in the dark.


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