Rod And Cone Contributions To S Potentials From Cat Retina
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Rod And Cone Contributions To S Potentials From Cat Retina
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Author : Roy Herbert Steinberg
language : en
Publisher:
Release Date : 1969
Rod And Cone Contributions To S Potentials From Cat Retina written by Roy Herbert Steinberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Retina categories.
The problem of whether the rods contribute to S-potentials was studied in the intact eye of the cat. S-potentials from luminosity units (L-units) were evoked by small spots of relatively monochromatic light in dark- and light-adapted retinae. The spectral sensitivity curve for dark-adapted S-potentials had its maximum at 500 nm, and the form of dark-adapted responses also suggested that rods were excited. The spectral sensitivity curve for light-adapted S-potentials had its maximum at 560 nm, and response latencies even at threshold were much faster than in dark adaptation. Individual S-potentials exhibited Purkinje shifts. It is concluded that rhodopsin rods contribute to S-potentials (L-type) in the cat and that cones contribute to the same responses. (Author).
Rod And Cone Contributions To S Potentials From Cat Retina
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Author : Roy H. Steinberg
language : en
Publisher:
Release Date : 1969
Rod And Cone Contributions To S Potentials From Cat Retina written by Roy H. Steinberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
The problem of whether the rods contribute to S-potentials was studied in the intact eye of the cat. S-potentials from luminosity units (L-units) were evoked by small spots of relatively monochromatic light in dark- and light-adapted retinae. The spectral sensitivity curve for dark-adapted S-potentials had its maximum at 500 nm, and the form of dark-adapted responses also suggested that rods were excited. The spectral sensitivity curve for light-adapted S-potentials had its maximum at 560 nm, and response latencies even at threshold were much faster than in dark adaptation. Individual S-potentials exhibited Purkinje shifts. It is concluded that rhodopsin rods contribute to S-potentials (L-type) in the cat and that cones contribute to the same responses. (Author).
Rod Cone Interaction In S Potentials From Cat Retina
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Author : Roy Herbert Steinberg
language : en
Publisher:
Release Date : 1969
Rod Cone Interaction In S Potentials From Cat Retina written by Roy Herbert Steinberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Retina categories.
Rod-cone interaction in cat S-potentials was studied by analyzing the effect of wavelength and intensity upon the form of dark-adapted responses. Flashes of white light and relatively monochromatic flashes produced responses that seemed to originate from the excitation of both receptor types. The rod response changed as a function of intensity, peaking at approx. 2.5 log above threshold and increasing in duration at approx. 3.0 log above threshold. The cone response seemed in some way to add to the changing rod response. V-Log I curves showed that the rod responses reached a ceiling (initial peak voltage) at approx. 3.5 log above threshold while the maintained voltage leveled off at a lower intensity. Both ceilings were obscured by the apparent addition of the cone contribution. Cone and rod responses to brief orange and blue lights of moderate intensity, separated in time, added together across a complete range of intervals. (Author).
Rod Cone Interaction In S Potentials From Cat Retina
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Author : Roy H. Steinberg
language : en
Publisher:
Release Date : 1969
Rod Cone Interaction In S Potentials From Cat Retina written by Roy H. Steinberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with categories.
Rod-cone interaction in cat S-potentials was studied by analyzing the effect of wavelength and intensity upon the form of dark-adapted responses. Flashes of white light and relatively monochromatic flashes produced responses that seemed to originate from the excitation of both receptor types. The rod response changed as a function of intensity, peaking at approx. 2.5 log above threshold and increasing in duration at approx. 3.0 log above threshold. The cone response seemed in some way to add to the changing rod response. V-Log I curves showed that the rod responses reached a ceiling (initial peak voltage) at approx. 3.5 log above threshold while the maintained voltage leveled off at a lower intensity. Both ceilings were obscured by the apparent addition of the cone contribution. Cone and rod responses to brief orange and blue lights of moderate intensity, separated in time, added together across a complete range of intervals. (Author).
The Rod After Effect In S Potentials From Cat Retina
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Author : Roy Herbert Steinberg
language : en
Publisher:
Release Date : 1969
The Rod After Effect In S Potentials From Cat Retina written by Roy Herbert Steinberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Retina categories.
The relation of the rod after-effect to percentage rhodopsin bleached was studied in S-potentials from cat retina. At threshold, flashes which produced the rod after-effect bleached only very small quantities of rhodopsin; and at a fixed flash duration, the duration of the after-effect increased as a function of log intensity. The after-effect's threshold occurred at about the intensity which saturated the maintained voltage. With flash intensity fixed (6.5 log td. scotopic) and flash duration increased (0.5 to 64.0 sec) the duration of the after-effect was a linear function of exposure time. The duration continued to increase after an exposure of 16 sec, even though at least 99 per cent of the rhodopsin had been bleached. It is concluded that the after-effect originates from something which accumulates after the maintained voltage in rod pathways reaches a ceiling. The accumulation can continue at a fixed rate irrespective of the bleaching rate. (Author).
Webvision
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Author : Helga Kolb
language : en
Publisher:
Release Date : 2007
Webvision written by Helga Kolb and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The S Potential
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Author : Boris D. Drujan
language : en
Publisher:
Release Date : 1982
The S Potential written by Boris D. Drujan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Medical categories.
Visual Perception
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Author : Lothar Spillmann
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Visual Perception written by Lothar Spillmann and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Psychology categories.
This book presents an interdisciplinary overview of the main facts and theories that guide contemporary research on visual perception. While the chapters cover virtually all areas of visual science, from philosophical foundations to computational algorithms, and from photoreceptor processes to neuronal networks, no attempt has been made to provide an exhaustive treatment of these topics. Rather, researchers from such diverse disciplines as psychology, neurophysiology, anatomy, and clinical vision sciences have worked together to review some of the most important correlations between perceptual phenomena and the underlying neurophysiological processes and mechanisms. The book is thus intended to serve as an advanced text for graduate students and as a guide for all vision researchers to understanding current progress outside their specialized fields of interest. ï Examines parallel processing of visual informationï Discusses links between physiologically-measured receptive fields and psychophysically-measured perceptive fieldsï Presents a spatial sampling by the retina and cortical modulesï Covers signal transduction and the sites of adaptationï Describes a single-cell analysis of attentionï Discusses computational models of vision
Cumulated Index Medicus
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Author :
language : en
Publisher:
Release Date : 2000
Cumulated Index Medicus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Medicine categories.
Aerospace Medicine And Biology
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Author :
language : en
Publisher:
Release Date : 1973
Aerospace Medicine And Biology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Aviation medicine categories.
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).