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Electrical Stylomastoidal and Magnetic Transcranial Stimulation of the Facial Nerve in Bell’s Palsy: Time Course of Electrophysiological Parameters

  • F. X. Glocker
  • M. R. Magistris
  • K. M. Rösler
  • Ch. W. Hess
Conference paper

Abstract

Facial nerve motor neurographies were performed at various time intervals after onset of Bell’s palsy in 75 patients. Amplitudes and onset latencies of the compound muscle action potential (CMAP) of m. nasalis and/or mentalis were measured after electrical extracranial (fossa stylomastoidea; ElStim) and magnetic transcranial (intracranial; MagStim) stimulation of the facial nerve, and in some patients also after magnetic cortex stimulation. Onset latencies were on average slightly increased on the side of the palsy: MagStim 109.8% (SD 19.8), ElStim 107.2% (SD 15.2). The time course of CMAP amplitudes was characterized by an early and marked reduction after MagStim as compared to ElStim (in 68% of patients MagStim evoked no response). Mean amplitudes (as percentages of the healthy side) versus days of palsy were:

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • F. X. Glocker
    • 1
    • 2
  • M. R. Magistris
    • 1
    • 2
  • K. M. Rösler
    • 1
    • 2
  • Ch. W. Hess
    • 1
    • 2
  1. 1.Department of NeurologyUniversities of Berne and GenevaSwitzerland
  2. 2.Division of Clinical NeurophysiologyUniversities of Berne and GenevaSwitzerland

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