Author/Editor		Podnar, Simon
Title		Electromyography of the anal sphincter: which muscle to examine?
Type		članek
Source		Muscle Nerve
Vol. and No.		Letnik 28
Publication year		2003
Volume		str. 377-9
Language		eng
Abstract		Electromyographic examination of the deeper extemal anal sphincter (EAS) muscle is far more uncomfortable than of the subcutaneous muscle, so we tested the need for its examination. We compared the findings in 85 paired examinations of ipsilateral subcutaneous and deeper EAS muscles in 67 patients with a cauda equina lesion. When the other muscle was normal, the deeper or subcutaneous muscle was pathological in 18% or 13% of pairs, respectively. In addition, the subcutaneous EAS muscle was usually more severely affected than the deeper EAS muscle. Thus, examination of the deeper EAS muscle did not increase the sensitivity of MUP analysis significantly, and did not seem clinically necessary.
Descriptors		ELECTROMYOGRAPHY ANUS LUMBOSACRAL PLEXUS CAUDA EQUINA NERVE COMPRESSION SYNDROMES