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Related Experiment Videos

Esophageal contractility synchronous with expiration.

M Mohri1, N Ohtsuki, M Amatsu

  • 1Department of Otorhinolaryngology--Head and Neck Surgery, Kobe University School of Medicine, Japan.

The Annals of Otology, Rhinology, and Laryngology
|August 24, 1999
PubMed
Summary

The cervical esophagus contracts during expiration, preventing air from entering the stomach during speech or deep breaths. This muscle activity is regulated by the recurrent laryngeal nerve.

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Area of Science:

  • Laryngology
  • Gastroenterology
  • Neurology

Background:

  • Previous research indicated cervical esophagus closure during tracheoesophageal phonation.
  • The mechanism and neural regulation of this closure were not fully understood.

Purpose of the Study:

  • To investigate cervical esophageal muscle contraction during expiration.
  • To determine the role of the recurrent laryngeal nerve in regulating esophageal motor activity.

Main Methods:

  • Electromyography of esophageal musculature in 2 laryngectomees.
  • Fluoroscopy of the esophagus during tracheoesophageal phonation in 13 laryngectomees.
  • Comparison of esophageal closure in subjects with and without paratracheal dissection (PTD).

Main Results:

Related Experiment Videos

  • Electromyography showed muscle discharges synchronous with expiration.
  • Subjects who underwent paratracheal dissection (PTD) exhibited a lower superior limit of esophageal closure.
  • This suggests loss of contractility in the cervical esophagus following sacrifice of the recurrent laryngeal nerve's esophageal branch.

Conclusions:

  • The cervical esophagus contracts during expiration, preventing gastric air entry during phonation or deep breaths.
  • The esophageal branch of the recurrent laryngeal nerve is implicated in regulating this esophageal closure mechanism.