Motor evoked potentials recorded from external anal sphincter by cortical and lumbo-sacral magnetic stimulation: normative data

Journal of the Neurological Sciences
G PelliccioniV Piloni

Abstract

Electrophysiological activation of the motor pathways can be obtained by electrical or magnetic stimulation. The latter has the great advantage of being painful and able to stimulate deeply situated nervous structures. Only a few reports describe responses obtained from pelvic floor muscles and external anal sphincter (EAS) by transcranial and lumbo-sacral magnetic stimulation. Our purpose is to present normative data of motor evoked responses from EAS in a group of healthy subjects (age range 19-80 years) using a standardized protocol of magnetic stimulation. Nine females and 7 males, with a mean age of 52.63 years, were included in this study. They had no known neurological and gastrointestinal disease. Magnetic shocks were delivered by a Magstim 200 (Novametrix) and a circular coil, centered on the vertex and on the lumbo-sacral region. Electromyographic recordings were taken from EAS using needle electrodes. The cortical magnetic stimulation was performed in two conditions: at rest and during a mild contraction of pelvic floor muscles. The mean values of motor evoked potentials (MEPs) latencies after cortical stimulation were 26.92+/-3.01 ms at rest and 23.31+/-2.70 ms during facilitation. Motor latency after lumbo-sacral r...Continue Reading

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Citations

Jun 17, 2003·Neurourology and Urodynamics·Soren BrostromGunnar Lose
Nov 27, 2004·Experimental Brain Research·Jean-Pascal Lefaucheur
Jun 7, 2005·Diseases of the Colon and Rectum·Giuseppe Pelliccioni, Osvaldo Scarpino
Feb 18, 2003·Acta chirurgica Iugoslavica·A Shafik
Dec 21, 2013·Techniques in Coloproctology·G PelliccioniO Scarpino
Nov 5, 2003·Neurourology and Urodynamics·Søren Brostrøm
Aug 21, 2013·Colorectal Disease : the Official Journal of the Association of Coloproctology of Great Britain and Ireland·G ParisA M Leroi
Dec 17, 2008·Expert Review of Gastroenterology & Hepatology·Jose M Remes-Troche, Satish S C Rao
Feb 26, 2004·Neurourology and Urodynamics·Andre ReitzBrigitte Schurch
Jan 27, 2011·The American Journal of Gastroenterology·Kasaya TantiphlachivaSatish S C Rao
Jul 19, 2005·Muscle & Nerve·Jean-Pascal Lefaucheur
Oct 23, 2010·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·J M Remes-TrocheS S C Rao
May 14, 2014·Diseases of the Colon and Rectum·Satish S C RaoJose Remes-Troche
Jul 29, 2020·Journal of Neurotrauma·Alison M M WilliamsTania Lam
Sep 15, 2018·Clinical Gastroenterology and Hepatology : the Official Clinical Practice Journal of the American Gastroenterological Association·Xuelian XiangSatish S C Rao

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