Intrarectal ground electrode improves the reliability of motor evoked potentials recorded in the anal sphincter.
Motor evoked potentials (MEPs) can be recorded in the external anal sphincter in response to magnetic stimulation of the cerebral cortex or sacral roots. However, the magnitude of the stimulus artifact may alter the reliability of anal MEP recording. An intrarectal ground electrode substantially reduces stimulus artifact and technical failure, improving MEP latency determination to sacral root stimulation in particular.
Lefaucheur
Jean-Pascal
JP
Service de Physiologie, Explorations Fonctionnelles, Centre Hospitalier Universitaire Henri Mondor, 51 Avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France. jean-pascal.lefaucheur@hmn.ap-hop-paris.fr
D001003:Anal Canal / Q000294:innervation* / Q000502:physiology; D016477:Artifacts; D002908:Chronic Disease; D003248:Constipation / Q000175:diagnosis*; D003943:Diagnostic Techniques, Neurological / Q000592:standards*; D004558:Electric Stimulation; D019054:Evoked Potentials, Motor; D005260:Female; D006801:Humans; D008280:Magnetics; D008297:Male; D008875:Middle Aged; D011930:Reaction Time; D015203:Reproducibility of Results; D013126:Spinal Nerve Roots / Q000502:physiology