Document Detail

Spatial summation and visual adaptation in the inner part of the frog retina.
MedLine Citation:
PMID:  2786313     Owner:  NLM     Status:  MEDLINE    
The spatial summation of the proximal negative response (PNR) of frog retina was analyzed during different states of adaptation induced by repetitive light stimulation with either 15 sec or 1 min interstimulus interval. The spatial summation area of the PNR was found to be wider during relatively more dark adapted conditions compared to relatively more light adapted ones. This finding indicates that lateral mechanisms in the inner network of the retina seem to be activated by adapting stimuli. Secondly, the results suggest that the activity of the amacrines, as reflected by the PNR, may initiate the series of neuronal events which underlie the oscillatory potentials (OPs) of the electroretinogram (ERG).
I Hahn; L Wachtmeister
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta ophthalmologica     Volume:  67     ISSN:  0001-639X     ISO Abbreviation:  Acta Ophthalmol (Copenh)     Publication Date:  1989 Apr 
Date Detail:
Created Date:  1989-07-12     Completed Date:  1989-07-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370347     Medline TA:  Acta Ophthalmol (Copenh)     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  131-6     Citation Subset:  IM    
Department of Ophthalmology, Karolinska Institute/Huddinge University Hospital, Sweden.
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MeSH Terms
Adaptation, Ocular*
Dark Adaptation
Photic Stimulation
Rana pipiens
Rana temporaria
Retina / physiology*

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