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One-hundred-sixty single-fiber EMG studies of the extensor digitorum communis muscle were performed on 127 patients with myasthenia gravis; 131 demonstrated defective neuromuscular transmission. Jitter determinations in the biceps, deltoid or frontalis muscles increased the diagnostic yield significantly. Evoked-potential EMG studies were abnormal in less than 50 percent of patients in whom they were performed. The most sensitive criterion of abnormality was the percentage of fibers with increased jitter; the sensitivity of the test was enhanced, however, if the mean jitter of the tested muscle was also used as a criterion of abnormality. Since increased jitter may also be seen in primary muscle and nerve disease, these disorders must be excluded by other means before diagnosing myasthenia gravis on the basis of the single-fiber studies.
D B Sanders, and
J F Howard, and
T R Johns
December 1986,
Zhonghua shen jing jing shen ke za zhi = Chinese journal of neurology and psychiatry,
D B Sanders, and
J F Howard, and
T R Johns
May 1988,
Taiwan yi xue hui za zhi. Journal of the Formosan Medical Association,
D B Sanders, and
J F Howard, and
T R Johns
January 2002,
Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society,
D B Sanders, and
J F Howard, and
T R Johns
June 1990,
Muscle & nerve,
D B Sanders, and
J F Howard, and
T R Johns
May 1993,
Muscle & nerve,
D B Sanders, and
J F Howard, and
T R Johns
February 1981,
Rinsho shinkeigaku = Clinical neurology,
D B Sanders, and
J F Howard, and
T R Johns
January 2000,
Revista de neurologia,
D B Sanders, and
J F Howard, and
T R Johns
April 2008,
Muscle & nerve,
D B Sanders, and
J F Howard, and
T R Johns
September 1999,
Muscle & nerve,
D B Sanders, and
J F Howard, and
T R Johns
June 2001,
Acta neurologica Scandinavica,
