Single fiber electromyography of extraocular muscles: A sensitive method for the diagnosis of ocular myasthenia gravis
1995; Wiley; Volume: 18; Issue: 9 Linguagem: Inglês
10.1002/mus.880180904
ISSN1097-4598
AutoresAlberto Rivero, Luis Crovetto, Lidia López, Ricardo A. Maselli, Martín Nogués,
Tópico(s)Salivary Gland Tumors Diagnosis and Treatment
ResumoAbstract We performed single fiber electromyography (SFEMG) in the superior rectus and levator palpebralis (SR‐LP) muscles of 17 patients with pure ocular myasthenia gravis (MG) and 9 controls. Thirteen patients were also assessed with SFEMG in the orbicularis oculi (OO) muscle. All the MG patients but none of the control subjects showed abnormal SFEMG jitter in the SR‐LP muscles. On the other hand, only 62% of the MG patients had abnormal SFEMG jitter in the OO muscle. The procedure was well tolerated by the patients, and complications were minor. We conclude that SFEMG of the SR–LP muscles is a safe and highly sensitive technique for the diagnosis of ocular MG. © 1995 John Wiley & Sons, Inc.
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