Document Detail

Segmental innervation in lumbosacral transitional vertebrae (LSTV): a comparative clinical and intraoperative EMG study.
MedLine Citation:
PMID:  20581139     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Despite the high prevalence of lumbosacral transitional vertebrae (LSTV), little is known about the segmental innervation in this condition. METHODS: The authors performed a prospective comparative clinical evaluation and an intraoperative electromyographic (EMG) investigation on patients with six lumbar vertebral bodies (6LVB) and on patients with five lumbar vertebrae (5LVB). First, clinical pain distribution in 80 patients (46 patients with 6LVB, 34 patients with 5LVB) with degenerative lumbar diseases were analysed between patient groups. Intraoperative EMG monitoring of five lower-limb muscles was performed. Compound muscle action potentials were obtained from 100 nerve roots of our 80 patients. RESULTS: The EMG results compared fairly to the clinical findings: 40 CMAPs from 5LVB and 60 CMAPs from 6LVB patients were compared with each other within L3 to S levels. First, there was no difference between groups in the pattern of radicular pain and myotomal innervation at the level L3/4 and L4/5 (p=0.39-1.0). Second, the nerve root stimulated at the L5/6 level compares to the S1 root in 5LVB patients; the only difference was found in a coinnervation of the biceps femoris muscle that is less frequent in 6LVB patients (p=0.02). Third, the nerve root at the L6/S level corresponds to the S1 as well as to the S2 root in 5LVB patients. CONCLUSION: Intraoperative EMG monitoring of surgically decompressed nerve roots was found to be the ideal means of unequivocal determination of segmental innervation in LSTV patients.
Philipp Hinterdorfer; Babak Parsaei; Karl Stieglbauer; Michael Sonnberger; Johannes Fischer; Gabriele Wurm
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of neurology, neurosurgery, and psychiatry     Volume:  81     ISSN:  1468-330X     ISO Abbreviation:  J. Neurol. Neurosurg. Psychiatr.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-06-28     Completed Date:  2010-07-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985191R     Medline TA:  J Neurol Neurosurg Psychiatry     Country:  England    
Other Details:
Languages:  eng     Pagination:  734-41     Citation Subset:  IM    
Neurosurgical Department, Landesnervenklinik Wagner Jauregg, Wagner Jauregg Weg 15, A-4020 Linz, Austria.
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MeSH Terms
Action Potentials / physiology
Aged, 80 and over
Electric Stimulation
Intervertebral Disk Displacement / pathology,  surgery
Lumbar Vertebrae / abnormalities*,  pathology,  surgery
Lumbosacral Region / abnormalities*,  pathology,  surgery
Middle Aged
Monitoring, Intraoperative*
Muscle, Skeletal / physiopathology
Neuromuscular Blockade
Neurosurgical Procedures
Prospective Studies
Radiculopathy / etiology,  pathology
Spinal Nerve Roots / physiology
Spinal Stenosis / pathology,  surgery
Young Adult

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