Hyoid bone and larynx movements during electrical stimulation of motor points in laryngeal elevation muscles: A preliminary study

Hitoshi Kagaya, Mikoto Baba, Eiichi Saitoh, Sumiko Okada, Michio Yokoyama, Yoshihiro Muraoka

Research output: Contribution to journalArticle

9 Citations (Scopus)


Objectives: This study aimed to determine the laryngeal elevation muscle motor points, evaluate the movement of hyoid bone and larynx during stimulation of the motor points, and examine the potential for treating severe dysphagia by functional electrical stimulation. Methods: The motor points of the laryngeal elevation muscles were anatomically determined from four cadavers. Those motor points in two healthy subjects and one lateral medullary syndrome patient were electrically stimulated by surface or implanted electrodes. Results: The movements elicited by electrical stimulation of the motor points were greater in implanted than in surface electrodes. Elevation of the hyoid bone and the larynx in a lateral medullary syndrome patient were achieved with the implanted electrodes, but the upper esophageal sphincter opening was not obtained unless an additional cricopharyngeus muscle block was provided. Conclusion: The hyoid bone and larynx were elevated by electrically stimulating the motor points of the laryngeal elevation muscles.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
Issue number3
Publication statusPublished - 2011 May
Externally publishedYes



  • Dysphagia
  • functional electrical stimulation
  • hyoid bone
  • larynx
  • motor point

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine
  • Neurology
  • Clinical Neurology

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