Document Detail


Abnormal response from the sternocleidomastoid muscle in patients with spasmodic torticollis: observations during microvascular decompression operations.
MedLine Citation:
PMID:  8304077     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Electromyographic (EMG) recordings from patients undergoing microvascular decompression (MVD) operations to relieve spasmodic torticollis were studied. When EMG potentials were recorded from the sternocleidomastoid muscle in response to electrical stimulation of the spinal accessory nerve (SAN) at the neck, an abnormal (delayed) response was seen in 9 of 12 patients who had unilateral symptoms. In 5 patients with bilateral symptoms, no such delayed response was seen. We assume that this abnormal muscle response depends on an abnormal cross-transmission. Neural conduction time measurements, using electrical stimulation of the intracranial portion of the SAN, indicated that the location of this cross-transmission was more central than the vascular compression of the SAN. We hypothesize that this location might be in the motonucleus of the SAN. Similarities between these abnormal EMG findings in patients with spasmodic torticollis and those reported earlier in patients with hemifacial spasm (HFS) are presented.
Authors:
S Saito; A R Møller; P J Jannetta; H D Jho
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta neurochirurgica     Volume:  124     ISSN:  0001-6268     ISO Abbreviation:  Acta Neurochir (Wien)     Publication Date:  1993  
Date Detail:
Created Date:  1994-03-04     Completed Date:  1994-03-04     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0151000     Medline TA:  Acta Neurochir (Wien)     Country:  AUSTRIA    
Other Details:
Languages:  eng     Pagination:  92-8     Citation Subset:  IM    
Affiliation:
Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pennsylvania.
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MeSH Terms
Descriptor/Qualifier:
Accessory Nerve / physiopathology,  surgery*
Adult
Aged
Electric Stimulation
Electromyography*
Female
Functional Laterality / physiology
Humans
Male
Microsurgery*
Middle Aged
Neck Muscles / innervation*
Nerve Compression Syndromes / physiopathology,  surgery*
Reaction Time / physiology
Torticollis / physiopathology,  surgery*

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


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