Document Detail


The electroretinogram recorded at the onset of dark-adaptation: understanding the origin of the scotopic oscillatory potentials.
MedLine Citation:
PMID:  11097118     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to examine the origin of the oscillatory potentials (OPs) recorded at the onset of dark-adaptation. Our results show that following pre-exposure of the retina to progressively brighter photopic backgrounds there is a complete abolition of OP4 and approximately 50% of OP3, while OP2 is not affected in responses evoked to dim flashes of white light and recorded at the onset of dark-adaptation. These results bring further support to the claim that the short latency OP2 is cone-mediated while the OP3 and OP4 would have a significant rod contribution. However, a more complex picture of OP genesis arises when flicker and response to brighter white light flashes, also obtained within the first minute of dark-adaptation are considered. The latter would suggest that our understanding of the origin of the OPs cannot be exclusively based on which of the two class of photoreceptors is preferentially stimulated at the time the response is recorded.
Authors:
S Rousseau; P Lachapelle
Related Documents :
8369548 - Circadian rhythm in the visual system of the lizard anolis carolinensis.
1117278 - Slow piii component of the carp electroretinogram.
6601088 - The photopic electroretinogram in congenital stationary night blindness with myopia.
16750238 - Cone phototransduction and growth of the erg b-wave during light adaptation.
12022618 - Computation and visualization of three-dimensional soft tissue motion in the orbit.
20968708 - Acoustical solutions to archaeological mysteries at chichen itza's temple of kukulkan.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Documenta ophthalmologica. Advances in ophthalmology     Volume:  99     ISSN:  0012-4486     ISO Abbreviation:  Doc Ophthalmol     Publication Date:  1999  
Date Detail:
Created Date:  2000-11-29     Completed Date:  2000-12-07     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370667     Medline TA:  Doc Ophthalmol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  135-50     Citation Subset:  IM    
Affiliation:
Department of Neurology-Neurosurgery, McGill University, Montreal Children's Hospital Research Institute, Quebec, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Dark Adaptation / physiology*
Electroretinography*
Humans
Oscillometry
Photic Stimulation
Photoreceptor Cells, Vertebrate / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  The a- and b-wave latencies as a prognostic indicator of neovascularisation in central retinal vein ...
Next Document:  Development of receptoral responses in pigmented and albino guinea-pigs (Cavia porcellus).