Transcranial magnetic stimulation of the accessory nerve. Investigation of the site and mechanism of excitation in the cat

K. Gotoh, T. Ohira, M. Ishihara, M. Kobayashi, A. Nakamura, S. Toya, M. Takase

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The site where transcranial magnetic stimulation excites the accessory nerve was studied in 5 cats. Transcranial magnetic stimulation of the accessory nerve was recorded from the right trapezius. The accessory nerve was stimulated electrically at the C1 level, jugular tubercle and jugular foramen. The latencies of the compound muscle action potentials (CMAPs) for each portion were measured and compared with the magnetic response, which was coincidental with that of the jugular tubercle. The accessory nerve was then transected in steps distally from the C1 level, and CMAPs following magnetic stimulation were recorded at each step. The CMAPs disappeared following the nerve transection at the jugular tubercle. The results of both approaches in this study conclude that transcranial magnetic stimulation excites the accessory nerve at jugular tubercle. This stimulation site was anatomically coincidental with that of the facial nerve and trigeminal nerve in being right before the point where the nerve bends. Following the accessory nerve transection at the C1 level, the amputation stump was moved cranially, and CMAPs disappeared. CMAPs recorded after the accessory nerve was returned to its original position. These examinations suggested that sudden alteration of the traveling lie of the nerve participates in the mechanism of transcranial magnetic stimulation.

Original languageEnglish
Pages (from-to)363-367
Number of pages5
JournalBrain and Nerve
Volume47
Issue number4
Publication statusPublished - 1995 Jan 1

Keywords

  • accessory nerve
  • cat
  • cranial nerve
  • magnetic stimulation

ASJC Scopus subject areas

  • Neuroscience(all)

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    Gotoh, K., Ohira, T., Ishihara, M., Kobayashi, M., Nakamura, A., Toya, S., & Takase, M. (1995). Transcranial magnetic stimulation of the accessory nerve. Investigation of the site and mechanism of excitation in the cat. Brain and Nerve, 47(4), 363-367.