Serial quantitative electrophysiologic studies in sporadic inclusion body myositis. Electromyogr Clin Neurophysiol 2007;47(2):97-104
Date
05/08/2007Pubmed ID
17479726Scopus ID
2-s2.0-34147097508 (requires institutional sign-in at Scopus site) 4 CitationsAbstract
Sporadic inclusion body myositis (S-IBM) is a progressive, acquired myopathic process of unknown etiology. No known, successful or proven treatment exists. Quantitative EMG studies including concentric needle motor unit action potentials, interference pattern, macro-EMG and fiber density have allowed different measures to be made of the motor unit. These different measures allow inferences to be made in how the muscle fibers are distributed within both the normal and diseased motor unit. The present study is an effort to use multiple quantitative EMG measurements from the biceps brachii on a serial basis in order to study chronic changes in the motor unit with disease progression. Twenty-eight studies from 9 patients over a four-year period are shown. We conclude that while the concentric needle electrode is most helpful for diagnosing abnormality, the less selective macro-EMG and surface electrodes are better suited to monitor disease progression, especially in very weak muscles. These observations have practical applications for monitoring disease progression, or conversely, response to treatment.
Author List
Barkhaus PE, Nandedkar SDAuthor
Paul E. Barkhaus MD Professor in the Neurology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Action PotentialsAdult
Aged
Algorithms
Electromyography
Female
Humans
Male
Middle Aged
Muscle Contraction
Muscle, Skeletal
Myositis, Inclusion Body
Neuromuscular Junction
Reproducibility of Results
Sensitivity and Specificity
Synaptic Transmission
