| The effect of eccentricity on the contrast response function of multifocal visual evoked potentials (mfVEPs). | |
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MedLine Citation:
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PMID: 19341759 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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mfVEPs were recorded with a 22 degrees radius, 60 sector pattern reversal dartboard stimulus (VERIS) at six contrast levels (10%, 25%, 35%, 50%, 75%, 95%). Contrast response functions (CRFs) based on response amplitudes were adequately described by a simple hyperbolic function. The effect of reducing contrast on the amplitude was most apparent in the central 1 degrees radius, which had a C(50) (contrast at 50% of the maximum response) in excess of 50%, compared to values for C(50) in more eccentric regions that were 30% or lower. Mean latency increased 6 (+/-0.7 SE) ms from the highest to the lowest contrast tested, and did not vary significantly with eccentricity. |
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Authors:
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Michal Laron; Han Cheng; Bin Zhang; Laura J Frishman |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Date: 2009-03-31 |
Journal Detail:
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Title: Vision research Volume: 49 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-06-22 Completed Date: 2009-09-10 Revised Date: 2011-03-11 |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 1711-6 Citation Subset: IM |
Affiliation:
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College of Optometry, University of Houston, 505 J Davis Armistead Bldg, Houston, TX 77204-2020, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Accommodation, Ocular
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physiology Adult Contrast Sensitivity / physiology* Evoked Potentials, Visual / physiology* Female Humans Male Photic Stimulation Reaction Time Regression Analysis Visual Fields Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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P30 EY007551-20/EY/NEI NIH HHS; P30 EY007551-21/EY/NEI NIH HHS; P30 EY007551-24/EY/NEI NIH HHS; P30 EY07751/EY/NEI NIH HHS; T35 007088//PHS HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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