Document Detail

"Naked" spinal cord on a non-segmented baton-like bony structure in the tail of the electric fish Eigenmannia virescens (gymnotoidei).
MedLine Citation:
PMID:  630596     Owner:  NLM     Status:  MEDLINE    
The caudal spinal cord of Eigenmannia virescens is not enclosed in a neural canal of the vertebral column. In fact, a segmented vertebral column with neural and ventral arches is lacking and replaced by a non-segmented baton-like bony structure on which the free spinal cord is located. The baton cosists of calcified bone tissue with bone cells. Individual differences exist as far as the length of the rod is concerned. The "electromotor neurons" of this caudal part of the spinal cord are histochemically acetylcholinesterase-positive. The electrocytes which surround this part of the spinal cord show strong enzymatic activity on the posterior innervated face. However, there is also activity on the non-innervated lateral and anterior faces.
F Kirschbaum; F Neunier; S Tsuji
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cell and tissue research     Volume:  187     ISSN:  0302-766X     ISO Abbreviation:  Cell Tissue Res.     Publication Date:  1978 Feb 
Date Detail:
Created Date:  1978-05-20     Completed Date:  1978-05-20     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0417625     Medline TA:  Cell Tissue Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  263-9     Citation Subset:  IM    
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MeSH Terms
Acetylcholinesterase / analysis
Electric Organ / cytology
Fishes / anatomy & histology*
Neurons / analysis
Spinal Cord / analysis,  anatomy & histology*
Spine / anatomy & histology
Tail / anatomy & histology*
Reg. No./Substance:

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

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