Progress in Sensory Physiology

Progress in Sensory Physiology

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The study of the functional organization of the first synapse of the centripetal visual pathway at the outer plexiform layer level (OPL) ought to be made through the application of combined histological, electrophysiological, and neurochemical techniques. A large amount of new evidence has been accumu lated in the past 20 years on the structure of the retina and on the electrical responses of retinal cells to light stimulus. Also, recently, many substances considered as neurotransmitters in the brain have been found in the retina. The goal of the study of retinal function is to integrate the data obtained by structural and electrophysiological techniques and to identify and determine the role played by neurotransmitters or neuromodulators in the function of the retina. In this study it is important to realize the morphological and biochemical diversi ty displayed by the visual cells in the vertebrate retina which, according to Cresci telli (1972), has been produced qthrough the interaction of natural selection with diversity in the photic environment.q The evidence obtained shows that bipolar and especially horizontal cells, closely related to visual cells, display morphologi cal and probably biochemical differences among classes, genus, and even species according to the photic environment. These differences give peculiarities to the organization of the OPL, which must be taken into account when studying a par ticular retina with electrophysiological or neurochemical techniques.... urine formation 32 a€”, water regulatory mechanisms 32 -, - and salt balance 31 horizontal cells 87a€“97 a€” a€” , axonless 94a€“97 a€” a€”, short axon 89a€“94 horse 44, 46 a€”, ramp retina in the eye 46 horseradisch peroxidase (HPR) 3 hyperfocal distance 68, 69 iguana 47 a€“, schematic eye 47 ... axial length 51 a€“ design 74a€“76 a€” focal length 48 a€“, information capacity a€” power 56 64 a€“ 67 falcon eye 44 fibers, anbsp;...

Title:Progress in Sensory Physiology
Publisher:Springer Science & Business Media - 2012-12-06

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