The identification of neuroapraxia, axonostenosis and trigger zone in facial nerve pathology

A. Villani, G. Brusati, L. Mazzini, P. Pinelli, F. Pisano

Research output: Contribution to journalArticle


The classical electromyographic investigations and simultaneous recordings of voluntary activity and M responses from muscles of both the upper and lower branch of the facial nerve were carried out in 5 patients with Bell's palsy. R1 responses were also recorded. All investigations were extended to the healthy side. With the aim of localizing the point of axonostenosis with axonal atrophy we investigated the following parameters: conduction velocity (c.v.) in the fallopian canal, c.v. in the external facial nerve, side difference of R1-M. In one case of amyotrophic lateral sclerosis with previous Bell's palsy signs of collateral sprouting and of ephaptic transmission were detected.

Original languageEnglish
Pages (from-to)337-342
Number of pages6
JournalItalian Journal of Neurological Sciences
Issue number3
Publication statusPublished - Jun 1986



  • electromyography
  • entrapment syndromes
  • ephaptic transmission
  • Facial nerve pathology

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology

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