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Light-evoked expansion of subretinal space volume in the retina of the frog

B Huang and CJ Karwoski
Journal of Neuroscience 1 November 1992, 12 (11) 4243-4252; DOI: https://doi.org/10.1523/JNEUROSCI.12-11-04243.1992
B Huang
Department of Psychology, University of Georgia, Athens 30602.
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CJ Karwoski
Department of Psychology, University of Georgia, Athens 30602.
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Abstract

The retina of the frog was superfused with a Ringer solution containing impermeant “probe” cations and anions. Light-evoked concentration changes in these probe ions were measured in the subretinal space (SRS) with ion-selective microelectrodes. A decrease in probe ion concentration was found, and several observations suggest that this is caused by a light-evoked expansion of the SRS. The probe ion decrease was not seen in the isolated retina; thus, the pigment epithelial (PE) cells are important for its generation. Pharmacological studies suggest that K+ channels in the PE cells are important--perhaps the PE cells shrink in response to the light-evoked decrease in SRS [K+]. The light- evoked decrease of SRS volume may be important in the understanding of SRS solute concentrations, retina-PE adhesivity, photoreceptor-PE cell interactions, and the interphotoreceptor matrix.

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The Journal of Neuroscience: 12 (11)
Journal of Neuroscience
Vol. 12, Issue 11
1 Nov 1992
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Light-evoked expansion of subretinal space volume in the retina of the frog
B Huang, CJ Karwoski
Journal of Neuroscience 1 November 1992, 12 (11) 4243-4252; DOI: 10.1523/JNEUROSCI.12-11-04243.1992

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Light-evoked expansion of subretinal space volume in the retina of the frog
B Huang, CJ Karwoski
Journal of Neuroscience 1 November 1992, 12 (11) 4243-4252; DOI: 10.1523/JNEUROSCI.12-11-04243.1992
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JNeurosci   Print ISSN: 0270-6474   Online ISSN: 1529-2401