Normal values for single fiber EMG parameters of frontalis muscle in healthy subjects older than 70 years
Küçük Resim Yok
Tarih
2005
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ireland Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Objective: Single fiber EMG (SFEMG) is a potent electrophysiological method to evaluate impaired neuromuscular transmission, and allows sensitive diagnosis of neuromuscular transmission abnormalities such as myasthenia gravis. The jitter and fiber density values are different for various muscles and age groups and the reference values increase with age. In this study, we evaluated the reference values of jitter and fiber density of frontalis muscle in healthy subjects older than 70 years. Methods: We evaluated the jitter and fiber density of frontalis muscle in 32 healthy subjects. Twenty-two of them were between 70 and 79 years old (mean +/- SD, 73.9 +/- 1.7), and 10 of them were older than 80 years (mean +/- SD, 82.2 +/- 1.2). Results: Normal limit of jitter (95% confidence limit) was calculated as 40.4 mu s for healthy subjects between 70 and 79 years old and 43.7 mu s for healthy subjects older than 80 years and normal limit of fiber density (95% confidence limit) were calculated as 1.90 for subjects between 70 and 79 years old and 2.14 for subjects older than 80 years. Conclusions: We designated the reference values of jitter and fiber density for frontalis muscle in healthy subjects older than 70 years. Our reference values may have value to diagnose neuromuscular transmission abnormalities in elderly patients. Significance: SFEMG is sensitive for neuromuscular transmission abnormalities and it is important to know the reference values of frontalis muscle in healthy subjects older than 70 years. (c) 2005 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Single Fiber EMG, Jitter, Frontalis Muscle, Neuromuscular Transmission, Electromyography
Kaynak
Clinical Neurophysiology
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
116
Sayı
7
