| Stimulated single-fiber EMG of the frontalis and orbicularis oculi muscles in ocular myasthenia gravis. | |
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MedLine Citation:
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PMID: 14506723 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We performed single-fiber electromyography by axonal stimulation (stimulated SFEMG) of the frontalis and orbicularis oculi muscles of 20 patients with ocular myasthenia gravis (OM) and 46 controls. In controls, mean consecutive differences (MCD) ranged from 5 to 55 micros (average, 14.7 +/- 2.8 micros) in the frontalis and from 4 to 56 micros (average, 12.56 +/- 2.19 micros) in orbicularis oculi. The mean MCD of individual muscle potentials (MPs) was 14.6 +/- 6.8 micros in frontalis and 12.68 +/- 6.10 micros in orbicularis oculi. In the OM patients, the mean MCD was 43.85 +/- 25.18 micros in the frontalis and 69.85 +/- 29.55 micros in orbicularis oculi (P < 0.0001), and the number of MPs with altered MCD was 7.15 +/- 4.66 (range, 1-18) and 12.65 +/- 4.90 (range, 6-21), respectively (P < 0.0001). We conclude that stimulated SFEMG of the orbicularis oculi muscle is more sensitive for the diagnosis of OM than of the frontalis muscle. |
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Authors:
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J Valls-Canals; M Povedano; J Montero; J Pradas |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Muscle & nerve Volume: 28 ISSN: 0148-639X ISO Abbreviation: Muscle Nerve Publication Date: 2003 Oct |
Date Detail:
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Created Date: 2003-09-24 Completed Date: 2003-10-29 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7803146 Medline TA: Muscle Nerve Country: United States |
Other Details:
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Languages: eng Pagination: 501-3 Citation Subset: IM |
Affiliation:
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Unitat de Neuromuscular i Electromiografia, Institut Universitari Dexeus, Calatrava 83, 6 planta, 08017 Barcelona, Spain. unmemg@comb.es |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Case-Control Studies Electromyography Facial Muscles / physiopathology* Female Frontal Bone Humans Male Middle Aged Muscle Fibers, Skeletal Myasthenia Gravis / physiopathology* Oculomotor Muscles / physiopathology* |
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