Author/Editor		Podnar, Simon; Fowler, Clare J
Title		Sphincter electromyography in diagnosis of multiple system atrophy: technical issues
Type		članek
Source		Muscle Nerve
Vol. and No.		Letnik 29
Publication year		2004
Volume		str. 151-6
Language		eng
Abstract		Possible technical reasons for the controversy over the role of sphincter electromyography (EMG) in the diagnosis of multiple system atrophy (MSA) were analyzed. In a review of the literature, a high sensitivity (>60%) was found reported in 11 studies that included late components, and no value of the test was found in 4 studies that excluded them. This was also corroborated in a pilot study of 5 patients with probable MSA. With late components included, the mean motor unit potential (MUP) duration was prolonged in all 4 patients with an adequate single-MUP analysis sample and, with late components excluded, in 2 of 5 patients on multi-MUP analysis. At least in diagnostic EMG of MSA patients, late components should be included in the measurement of MUP duration.
Descriptors		ELECTROMYOGRAPHY OLIVOPONTOCEREBELLAR ATROPHY ANUS