Author/Editor		Podnar, Simon; Vodušek, David B; Stalberg, Erik
Title		Comparison of quantitative techniques in anal sphincter electromyography
Type		članek
Source		In: Trontelj JV, editor. Proceedings of the EC-IFCN (European chapter of the International federation of clinical neurophysiology) Ljubljana 2001. Regional EMG refresher course with the 17th dr. Janez Faganel memorial lecture; 2001 Oct 12-13; Ljubljana. Ljubljana: University medical centre, Institute of clinical neurophysiology,
Publication year		2001
Volume		str. II.1.-11
Language		eng
Abstract		Data comparing results and utillity of different quantitative electromyographic (EMG) techniques are limited. In the present study, we analyze the EMG signal from the external anal sphincter (EAS) muscle using three techniques of motor unit potential (MUP) analysis, and a technique of interferance pattern (IP) analysis. We examined 56 patients with damage to the cauda equina or conus medullaris, and 64 control subjects. Using manual-MUP and multi-MUP analysis about 20 MUPs, using a single-MUP technique about 10 MUPs, and using turn/amplitude (T/A) analysis about 20 IP samples were obtained. Their sensitivities in distinguishing neuropathic from control muscles were calculated. The single-MUP technique detected 63%, manual-MUP 57%, and multi-MUP analysis 62% of neuropathic muscles, and MUP parameters obtained by each of these differed significantly from the other. The sensitivity of T/A analysis of IP was 29%. Our results confirm the need for separate MUP normative data for each of the MUP analysis techniques, and favor them over the IP analysis technique. The normative data presented for the EAS muscle should improve and promote quantitative EMG in patients.
Descriptors		ELECTROMYOGRAPHY ANUS CAUDA EQUINA SPINAL CORD COMPRESSION URINARY INCONTINENCE CONSTIPATION MOTOR NEURONS