منابع مشابه
Photoreceptor Light Adaptation
The illumination at the earth’s surface varies by . 10 orders of magnitude during the normal day–night cycle, and the vertebrate visual system covers this entire range of light intensities with two neuronal subsystems that rely on the activity of two types of photoreceptor cells, rods and cones. Human rod vision operates over approximately seven decimal orders of illumination. The cone visual s...
متن کاملPhotoreceptor Sensitivity and Kinetics in Light Adaptation
In the preceding letter (Pepperberg, 2001), Dr. David Pepperberg offers an alternative interpretation to that given in our recent paper (Nikonov et al., 2000) for the nature of the changes underlying light adaptation in rod photoreceptors. We do not agree with Dr. Pepper-berg's interpretation, and we set out our reasons below. From the outset, we should make it clear that we and Dr. Pepperberg ...
متن کاملPhotoreceptor Light Adaptation: Untangling Desensitization and Sensitization
The illumination at the earth’s surface varies by . 10 orders of magnitude during the normal day–night cycle, and the vertebrate visual system covers this entire range of light intensities with two neuronal subsystems that rely on the activity of two types of photoreceptor cells, rods and cones. Human rod vision operates over approximately seven decimal orders of illumination. The cone visual s...
متن کاملLight Adaptation of Discrete Waves in the Limulus Photoreceptor
Light adaptation affects discrete waves in two ways. It reduces their average size and decreases the probability that a photon incident at the cornea causes a discrete wave. There is no effect of light adaptation on the latency of discrete waves, or on their time-course.
متن کاملHuman photoreceptor outer segments shorten during light adaptation.
PURPOSE Best disease is a macular dystrophy caused by mutations in the BEST1 gene. Affected individuals exhibit a reduced electro-oculographic (EOG) response to changes in light exposure and have significantly longer outer segments (OS) than age-matched controls. The purpose of this study was to investigate the anatomical changes in the outer retina during dark and light adaptation in unaffecte...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 2000
ISSN: 0022-1295,1540-7748
DOI: 10.1085/jgp.116.6.791