Transcranial Magnetic and Intraoperative Electrical Stimulation of the Trigeminal and Facial Nerves: Sites and Mechanisms of Excitation

  • U. D. Schmid
  • K. M. Rösler
  • C. W. Hess
  • H. J. Reulen
Conference paper

Summary

Currents induced by a rapidly varying magnetic field were applied to the parietooccipital scalps of patients undergoing neurosurgical operations to stimulate simultaneously the ipsilateral facial and trigeminal nerve, as well as other caudal motor cranial nerves. The magnetic stimulation was assumed to generate electrical currents in the cerebrospinal fluid (CSF). The stimulating currents were assumed to pass through the foramina of the respective cranial nerves distal to the CPA, where the nerves are still surrounded by CSF. Thus, the point of excitation for the facial nerve was within the labyrinthine segment of the facial canal; and for the trigeminal nerve was probably within Meckel’s cave.

Keywords

Glycerol Neurol Meningioma Dura Nial 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Benecke R, Meyer BU, Schönle P, Conrad B (1988) Transcranial stimulation of the human brain: Responses in muscles supplied by cranial nerves. Exp Brain Res 71: 623–632PubMedCrossRefGoogle Scholar
  2. Lang J (1981) Klinische Anatomie des Kopfes. Springer Verlag, Berlin Heidelberg New York, pp 386–389Google Scholar
  3. Maccabee PJ, Amassian VE, Cracco RQ, Cracco JB, Anziska BJ (1988) Intracranial Stimulation of the facial nerve in humans with the magnetic coil. Electroenceph Clin Neurophysiol 70: 350–354PubMedCrossRefGoogle Scholar
  4. Murray NMF, Hess CW, Mills KR, Schriefer TN, Smith SJM (1987) Proximal facial nerve conduction using magnetic stimulation. Electroenceph Clin Neurophysiol 66: 71CrossRefGoogle Scholar
  5. Rosier KM, Hess CW, Schmid UD (1989) Investigation of facial motor pathways by electrical and magnetic stimulation: Sites and mechanisms of excitation. J Neurol Neurosurg Psychiatry 52: 1149–1156CrossRefGoogle Scholar
  6. Schmid UD, Sturzenegger M, Ludin HP, Seiler RW, Reulen HJ (1988) Orthodromic (intra/extracranial) neurography to monitor facial nerve function intraoperatively. Neurosurgery 22: 945–950PubMedCrossRefGoogle Scholar
  7. Schriefer TN, Mills KR, Murray NMF, Hess CW (1988) Evaluation of proximal facial nerve conduction by transcranial magnetic stimulation. J Neurol Neurosurg Psychiatry 51: 60–66PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • U. D. Schmid
    • 1
  • K. M. Rösler
  • C. W. Hess
  • H. J. Reulen
  1. 1.Neurochirurgische UniversitätsklinikInselspitalBernSwitzerland

Personalised recommendations