Killed-End Corticospinal Motor Evoked Potential (MEP) in Patients with Spinal Cord Injury

  • Y. Katayama
  • T. Tsubokawa
  • S. Maejima
  • T. Hirayama
  • T. Yamamoto


A monophasic positive potential is recorded when a nerve impulse approaches but never passes beyond the recording site. This type of potential has been termed the killed end potential (KP). Studies in experimental animals have repeatedly suggested a clinical value for the KP in localizing the level of spinal cord lesions [3, 4, 9]. The KP has been recorded intraoperatively in patients with spinal cord lesions [7, 10, 11]. We have also demonstrated that the KP of spinospinal responses can be readily recorded preoperatively in patients with eletrodes inserted percutaneously into the spinal epidural space and indeed has a value for localizing lesions [5].


Spinal Cord Injury Motor Evoke Potential Axonal Degeneration Spinal Cord Lesion Paravertebral Muscle 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • Y. Katayama
    • 1
  • T. Tsubokawa
  • S. Maejima
  • T. Hirayama
  • T. Yamamoto
  1. 1.Department of Neurological SurgeryNihon University School of MedicineItabashi-ku, Tokyo, 173Japan

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