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Neurophysiological Study of Hemifacial Spasm:F Wave of the Facial Muscles Mami Ishikawa 1 , Takayuki Ohira 1 , Jun Namiki 2 , Moriichiro Takase 3 , Shigeo Toya 1 1Departments of Neurosurgery, School of Medicine, Keio University 2Department of Neurosurgery, Saiseikai Utsunomiya Hospital 3Departments of Clinical Neurophysiology, School of Medicine, Keio University Keyword: hemifacial spasm , F wave , neurophysiology , lateral spread pp.360-365
Published Date 1994/4/1
DOI https://doi.org/10.11477/mf.1406900622
  • Abstract
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We studied the F wave of the facial muscles on both the normal side and the spastic side in 14 patients with hemifacial spasm. The purpose of this study was to determine if the mechanism of hemifacials spasm originates in ephaptic transmis-sion in the facial nerve at the site of vascular com-pression or in a hyperexcited facial motor nucleus. Larger amplitude, longer duration and shorter latency F waves in the peripheral nerves than in normals indicate anterior horn cell hyperexcita-bility.


Copyright © 1994, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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