Document Detail

The dendritic varicosity: a mechanism for electrically isolating the dendrites of cat retinal amacrine cells?
MedLine Citation:
PMID:  6249448     Owner:  NLM     Status:  MEDLINE    
Amacrine dendritic varicosities from cat retina were reconstructed using serial electron micrographs. Each varicosity contained a synaptic input and a synaptic output, suggesting that they may function as isolated local circuits. A passive steady state electrical model demonstrated that for a given conductance change the varicose dendrite maximizes the local membrane potential and minimizes th distance membrane potential change as compared to other possible dendritic shapes. We, therefore, suggest that the function of the varicosities on amacrine cell dendrites might be to electrically isolate these local input-output circuits.
S A Ellias; J K Stevens
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Brain research     Volume:  196     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1980 Sep 
Date Detail:
Created Date:  1980-10-24     Completed Date:  1980-10-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  365-72     Citation Subset:  IM    
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MeSH Terms
Dendrites / physiology,  ultrastructure*
Membrane Potentials
Microscopy, Electron
Neurons / ultrastructure
Retina / cytology*
Synaptic Transmission
Synaptic Vesicles / ultrastructure

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