Document Detail

Theory of delayed lateral inhibition in the compound eye of limulus.
MedLine Citation:
PMID:  4528083     Owner:  NLM     Status:  MEDLINE    
Although the magnitude of lateral inhibition in the retina of Limulus polyphemus depends strongly on the distance between ommatidia, the time of delay tau between the response of one ommatidium and the consequent inhibition of another is independent of the distance between them and is approximately 0.1 sec. Moreover, experimental observations indicate that for intact undamaged retinae in intense spatially uniform illumination, the total inhibitory influence at a given ommatidium can exceed the excitation of that ommatidium. A simple theory combining these two known facts yields the following conclusions: The response of a healthy Limulus retina to an intense, temporally constant, and spatially uniform excitation e (in the usual Hartline-Ratliff units) should be a sustained synchronous oscillation of period 2tau, with the mean response over one complete cycle equal to approximately 1/2e. Under a broad class of circumstances the sustained oscillations should take the form of a succession of "bursts" and "rest periods", each of duration tau. The oscillations can have, however, a fine structure in which there is repeated information about the duration and sequence of any short pulses of excitation which occurred within a time-interval of length tau before the onset of steady excitation. Because it is repeated every 2tau seconds, this information remains available in the retina for interaction with subsequent changes of excitation.
B D Coleman; G H Renninger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  71     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  1974 Jul 
Date Detail:
Created Date:  1974-11-18     Completed Date:  1974-11-18     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2887-91     Citation Subset:  IM    
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MeSH Terms
Brachyura / physiology*
Models, Neurological
Neural Inhibition*
Photic Stimulation
Retina / physiology*

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

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