• J Clin Neurophysiol · Jun 2007

    Success rate of motor evoked potentials for intraoperative neurophysiologic monitoring: effects of age, lesion location, and preoperative neurologic deficits.

    • Xi Chen, Djordje Sterio, Xu Ming, Devaki D Para, Marri Butusova, Teresa Tong, and Aleksandar Beric.
    • Department of Neurology, New York University School of Medicine, New York, NY, USA.
    • J Clin Neurophysiol. 2007 Jun 1; 24 (3): 281-5.

    AbstractTranscranial electrical stimulation with myogenic motor evoked potential (MEP) recording was used for intraoperative neurophysiologic monitoring in 341 consecutive "high-risk" neurosurgical or orthopedic procedures. Overall, the success rate for establishing reliable MEP response was 94.8% for upper extremities and 66.6% for lower extremities. The rate was only 39.1% for lower extremities in patients with preoperative motor deficit and up to 81% in neurologically intact adults. Further analysis demonstrated that extremes of age or the presence of a lesion in the spinal cord and motor deficit contributed to failure in obtaining reliable MEPs.

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