Current—voltage relations in the rod photoreceptor network of the turtle retina

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Abstract
Electrical coupling between rod photoreceptors in response to light activation was studied in the eyecup preparation of the snapping turtle C. serpentina using intracellular microelectrodes. The time-varying and voltage-dependent properties observed at the input and in the coupling between rods appear to reflect characteristics of the rod''s plasma membrane and not of the coupling pathways between the rods. The outward-going rectification and relaxation phase of the response seemed to involve voltage-dependent conductance increases in the rod''s plasma membrane.