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Slow and spike potentials recorded from retinula cells of the honeybee drone in response to light.
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MedLine Citation:
PMID:  5722083     Owner:  NLM     Status:  MEDLINE    
Responses to light recorded by means of intracellular microelectrodes in isolated heads kept in oxygenated Ringer solution consist of a slow depolarization. Light adaptation increases the rates of depolarization and repolarization and decreases the amplitude of the response. Qualitatively these changes are similar to those observed in Limulus by Fuortes and Hodgkin. They are rapidly reversible during dark adaptation. In retinula cells of the drone eye a large single spike is recorded superimposed on the rising phase of the slow potential. The spike is a regenerative phenomenon; it can be triggered with electric current and is markedly reduced, sometimes abolished by tetrodotoxin. In rare cases cells were found which responded to light with a train of spikes. This behavior was only found under "unusual" experimental conditions; i.e., towards the end of a long experiment, during impalement, or at the beginning of responses to steps of strongly light-adapted preparations.
F Baumann
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  52     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1968 Dec 
Date Detail:
Created Date:  1969-01-17     Completed Date:  1969-01-17     Revised Date:  2010-06-22    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  855-75     Citation Subset:  IM    
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MeSH Terms
Adaptation, Physiological*
Evoked Potentials
Membrane Potentials
Retina / physiology*

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

Full Text
Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
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Copyright © 1968 by The Rockefeller University Press
Received Day: 7 Month: 6 Year: 1968
Print publication date: Day: 1 Month: 12 Year: 1968
Volume: 52 Issue: 6
First Page: 855 Last Page: 875
ID: 2225847
PubMed Id: 5722083

Slow and Spike Potentials Recorded from Retinula Cells of the Honeybee Drone in Response to Light
Fritz Baumann
From the Ophthalmology Branch, National Institute of Neurological Diseases and Blindness, National Institutes of Health, Bethesda, Maryland 20014.
Dr. Baumann's present address is Institut de Physiologie, Ecole de Médecine, Geneva, Switzerland

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