Subclinical cranial nerve involvement in hereditary motor and sensory neuropathy: A combined conduction study with electrical and magnetic stimulation

Rumi Kumagai-Eto, Yumiko Kaseda, Shozo Tobimatsu, Takenori Uozumi, Sadatoshi Tsuji, Shigenobu Nakamura

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Objective To evaluate the electrophysiological findings of clinically unaffected cranial nerves (facial, accessory and hypoglossal nerves) in hereditary motor and sensory neuropathy (HMSN). Methods The conduction times of the facial, accessory, and hypoglossal nerves in 10 patients with HMSN type I (HMSN I), 2 patients with HMSN Type II (HMSN II), and 20 normal controls were determined. The extra- and intracranial segments of the cranial nerves were stimulated electrically and magnetically, respectively. The relationships between the conduction parameters of the cranial nerves and limb nerves were analyzed. Results In patients with HMSN I, the conduction times of the distal and proximal segments were significantly prolonged in all 3 cranial nerves. A positive correlation was found between the conduction parameters of the cranial nerves and the limb nerves. Conclusions Electrophysiological involvement of the whole segment of the facial, accessory and hypoglossal nerves is common in patients with HMSN I without clinical signs of alterations. The degree of conduction slowing of the facial, accessory, and hypoglossal nerves paralleled that of limb nerves.

Original languageEnglish
Pages (from-to)1689-1696
Number of pages8
JournalClinical Neurophysiology
Volume115
Issue number7
DOIs
Publication statusPublished - Jul 2004

All Science Journal Classification (ASJC) codes

  • Sensory Systems
  • Neurology
  • Clinical Neurology
  • Physiology (medical)

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