Intraoperative Monitoring of Segmental Evoked Spinal Cord Potentials in Cervical Lesions

  • T. Goya
  • S. Miyahara
  • T. Mikura
  • K. Kinoshita
Conference paper


Evoked spinal cord potentials (ESCPs) are divided into segmental and conductive potentials [1–8]. The segmental potentials are obtained from the segmental level of the spinal cord by stimulating the peripheral nerves [1–3]. The conductive potentials are recorded at the rostral portion of the spinal cord far from the stimulated segment by stimulating the peripheral nerves or the spinal cord directly [5, 7]. In this paper, we report on segmental ESCPs directly obtained from the exposed dural surface intraoperatively in various cervical diseases. Although it seemed difficult to obtain completely normal waveforms in our operative cases, the evaluation of waveforms was tried by comparing them through pre- and postdecompression periods and by comparing the difference between affected and nonaffected sides. We also tried to evaluate whether monitoring of segmental ESCPs was useful as an indicator for sufficient decompression to the spinal cord and the nerve root. We obtained some interesting findings during these intraoperative monitorings.


Nerve Root Posterior Horn Cervical Spondylosis Median Nerve Stimulation Recorded Waveform 
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  1. 1.
    Austin GM, McCouch GP (1955) Presynaptic component of intermediary cord potential. J Neurophysiol 18: 441–451PubMedGoogle Scholar
  2. 2.
    Ertekin C (1976) Studies on the human evoked electrospinogram I. The origin of the segmental evoked potentials. Acta Neurol Scandinav 53: 3–20CrossRefGoogle Scholar
  3. 3.
    Kaneda A, Yamaura I, Kamikozuru M, Shinomiya K, Sato H, Yokoyama M (1985) An analysis of spinal cord potentials evoked by median nerve stimulation. In: Schramm J, Jones SJ (eds) Spinal cord monitoring. Springer, Berlin Heidelberg New York, pp 35–42Google Scholar
  4. 4.
    Kobayashi M (1985) On the origin of spinal cord potentials evoked by peripheral nerve stimulation and its clinical meaning Part 1. Clinical study. J Jpn Orthop Ass 59: 27–38 (in Japanese)Google Scholar
  5. 5.
    Maruyama Y, Shimoji K, Shimizu H, Kuribayashi H, Fujioka H (1982) Human spinal cord potentials evoked by different sources of stimulation and conduction velocities along the cord. J Neurophysiol 48: 1098–1107PubMedGoogle Scholar
  6. 6.
    Nashold BS, Ovelmen-Levitt J, Sharpe R, Higgins AC (1985) Intraoperative evoked potentials recorded in man directly from the dorsal roots and spinal cord. J Neurosurg 62: 680–693PubMedCrossRefGoogle Scholar
  7. 7.
    Shimoji K (1985) Clinical application of spinal cord evoked potentials recorded from the epidural space in man. Asian Med J 28: 349–362Google Scholar
  8. 8.
    Yates BJ, Thompson FJ, Mickle JP (1982) Origin and properties of spinal cord field potentials. Neurosurgery 11: 439–450PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • T. Goya
    • 1
  • S. Miyahara
  • T. Mikura
  • K. Kinoshita
  1. 1.Department of NeurosurgeryMiyazaki Medical CollegeKiyotake, MiyazakiJapan

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