| Phenomenological description of local extremes on contrast sensitivity curves. | |
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MedLine Citation:
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PMID: 19430976 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Previous studies have demonstrated that human contrast sensitivity curves have marked extremes [4]. This phenomenon has not yet been investigated. The present report describes studies of plots of frequency-contrast characteristics obtained using gratings with orientations of 0 degrees , 90 degrees , and 135 degrees . The results showed that: 1) periodically located extremes were marked on the averaged curve obtained using gratings with an orientation of 0 degrees , while use of gratings with orientations of 90 degrees and 135 degrees gave weak peaks; 2) on repeat testing, the amplitudes of extremes decreased sharply, to the level of disappearance by day 5 of testing. These data lead to the suggestion that the phenomenon of local extremes is not associated with random errors by the subjects but reflects the specific characteristics of information processing by the visual system. |
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Authors:
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A V Merkul'ev; D Yu Rogovanov |
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Publication Detail:
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Type: Journal Article Date: 2009-05-12 |
Journal Detail:
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Title: Neuroscience and behavioral physiology Volume: 39 ISSN: 1573-899X ISO Abbreviation: Neurosci. Behav. Physiol. Publication Date: 2009 Jun |
Date Detail:
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Created Date: 2009-05-18 Completed Date: 2009-08-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0330471 Medline TA: Neurosci Behav Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 457-62 Citation Subset: IM |
Affiliation:
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15th Central Research Laboratory of the Navy, 25 Konstantinovskaya, 198510, Petrodvorets, Russia. gbyjxtn@yandex.ru |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Contrast Sensitivity
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physiology* Humans |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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