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  • Title: Intrarectal ground electrode improves the reliability of motor evoked potentials recorded in the anal sphincter.
    Author: Lefaucheur JP.
    Journal: Muscle Nerve; 2005 Jul; 32(1):110-2. PubMed ID: 15880519.
    Abstract:
    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.
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