Studies on rod horizontal cell S-potential in dependence of the dark/light adapted state: a comparative study in Cyprinus carpio and Scyliorhinus canicula retinas.
Changes in light sensitivity, response time-course and electrical coupling of rod driven horizontal cells (RHC) were examined in the dark and light adapted states by intracellular recording. Comparative analyses were made of two fishes from different photic environments. RHC of Cyprinus carpio and external horizontal cells (EHC) of Scyliorhinus canicula retinas showed similar changes of their electrical responses to light stimuli when the dark-adapted retina was light-adapted: a decrease in sensitivity, an acceleration in the response time-course and an increase in the coupling strength.
Villa
P
P
Department of Physiology and Pharmacology, University of Alcalá de Henares, Madrid, Spain.
Bedmar
M D
MD
Barón
M
M
D000221:Adaptation, Ocular; D000818:Animals; D002347:Carps / Q000502:physiology*; D003623:Dark Adaptation / Q000502:physiology*; D005452:Fluoresceins; D008564:Membrane Potentials; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology; D010473:Perciformes / Q000502:physiology*; D010786:Photoreceptor Cells / Q000502:physiology*; D012684:Sensory Thresholds
D005452:Fluoresceins; C024098:6-carboxyfluorescein