Document Detail

Synaptic organization of a multifunctional interneuron in the central nervous system of Helix pomatia L.
MedLine Citation:
PMID:  6467342     Owner:  NLM     Status:  MEDLINE    
The morphology, axonal arborization and ultrastructure of synaptic connections of the V21 giant neuron in the visceral ganglion of the snail Helix pomatia has been investigated following intracellular labelling with horseradish peroxidase. The V21 neuron establishes several afferent and efferent axo-axonic connections, mainly along the first half of the primary axon. Collaterals of 200-300 micron length originate from the primary axon, which shows further arborization, and both afferent and efferent synaptic contacts are formed on these fine axon profiles. Afferent and efferent contacts of the cell occur within very short distances of a few micrometers. On the basis of ultrastructure and vesicle and granule content, several afferent terminals can be distinguished on V21 labelled axon profiles. The majority of these afferent terminals resembles peptidergic-(neurosecretory)-like terminals. This finding supports the possible transmitter role of neuropeptides in the central nervous system of gastropods. Our results are consistent with and provide morphological evidence for recent electrophysiological observations suggesting that, in addition to integrating input, the V21 neuron functions as an interneuron in Helix central nervous system.
K Elekes; K S Rózsa
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cell and tissue research     Volume:  236     ISSN:  0302-766X     ISO Abbreviation:  Cell Tissue Res.     Publication Date:  1984  
Date Detail:
Created Date:  1984-10-19     Completed Date:  1984-10-19     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0417625     Medline TA:  Cell Tissue Res     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  677-83     Citation Subset:  IM    
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MeSH Terms
Axons / ultrastructure
Central Nervous System / ultrastructure*
Helix (Snails)
Horseradish Peroxidase / diagnostic use
Interneurons / physiology,  ultrastructure*
Synapses / ultrastructure*
Reg. No./Substance:
EC 1.11.1.-/Horseradish Peroxidase

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