Document Detail


The diameter of the vertebral canal in dogs in cases of lumbosacral transitional vertebrae or numerical vertebral variations.
MedLine Citation:
PMID:  12021914     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
From Th1 to L7 midsagittal and interpedicular vertebral canal diameters were measured in macerated spines of 162 dogs to determine, whether the presence of lumbosacral transitional vertebrae or numerical vertebral variations are associated with dislocation of the maximal enlargement of the lumbar vertebral canal. Relative to dogs with a regular number of 27 presacral vertebrae (C7/Th13/L7), the maximal enlargement of the lumbar vertebral canal was more frequently ( P < 0.05) located at vertebra 24 in dogs with 26 presacral vertebrae (C7/Th13/L6), and more frequently at vertebra 25 in dogs with 28 presacral vertebrae (C7/Th13/L8). However, in dogs with 26 presacral vertebrae, maximal agreement in the spinal position of maximal lumbar vertebral canal diameters was achieved relative to dogs with 28 presacral vertebrae by adding one additional thoracic (Th6, 7, or 8) segment. Therefore, the present findings strongly suggest that relative to the regular (C7/Th13/L7) condition, decrease in the number of presacral vertebrae (C7/Th13/L6) is associated with incorporation of a midthoracic segment, whereas increase in the number of presacral vertebrae (C7/Th13/L8) is not related to the presence of an additional vertebral segment. When using Th1 as landmark, the difference in the position of the maximal enlargement of the lumbar vertebral canal between dogs with 26 and dogs with 28 presacral vertebrae in average was only one segment. It is known from previous reports that the maximal enlargement of the lumbar vertebral canal corresponds with the maximal enlargement of the lumbar spinal cord. When using S1 or the transitional vertebra as the landmark for determination of the appropriate site for subarachnoid cannulation, this site is expected to range within the same limits regardless of the vertebral formula.
Authors:
Sabine Breit; Wolfgang Künzel
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2002-04-16
Journal Detail:
Title:  Anatomy and embryology     Volume:  205     ISSN:  0340-2061     ISO Abbreviation:  Anat. Embryol.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-05-21     Completed Date:  2002-09-12     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7505194     Medline TA:  Anat Embryol (Berl)     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  125-33     Citation Subset:  IM    
Affiliation:
Muskuloskeletal Research Group, Institute of Anatomy, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria. Sabine.Breit@vu-wien.ac.at
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MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Female
Genetic Variation*
Lumbosacral Region
Male
Species Specificity
Spinal Canal / abnormalities*

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


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