Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve

Carol Smith Hammond, Paul W. Davenport, Alastair Hutchison, Randal A Otto

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Patients with recurrent laryngeal nerve (RLN) paresis demonstrate impaired function of laryngeal muscles and swallowing. The cricopharyngeus muscle (CPM) is a major component of the upper esophageal sphincter. It was hypothesized that the RLN innervates this muscle. A nerve branch leading from the RLN to the CPM was found in adult sheep by anatomic dissection. Electrical stimulation of the RLN elicited a muscle action potential recorded by electrodes placed in the ipsilateral CPM. Swallowing was investigated by mechanical stimulation of oropharynx pre- and postsectioning of the RLN. Severing of the RLN resulted in a loss of the early phases of swallow-related CPM electromyographic activity; however, late-phase CPM electromyographic activity persisted. The RLN provides motor innervation of the CPM, which also has innervation from the pharyngeal plexus.

Original languageEnglish (US)
Pages (from-to)89-94
Number of pages6
JournalJournal of Applied Physiology
Volume83
Issue number1
StatePublished - Jul 1997
Externally publishedYes

Fingerprint

Pharyngeal Muscles
Recurrent Laryngeal Nerve
Deglutition
Upper Esophageal Sphincter
Laryngeal Muscles
Swallows
Muscles
Oropharynx
Paresis
Electric Stimulation
Action Potentials
Dissection
Sheep
Electrodes

Keywords

  • Esophageal reflux
  • Glottis
  • Swallow

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve. / Hammond, Carol Smith; Davenport, Paul W.; Hutchison, Alastair; Otto, Randal A.

In: Journal of Applied Physiology, Vol. 83, No. 1, 07.1997, p. 89-94.

Research output: Contribution to journalArticle

Hammond, Carol Smith ; Davenport, Paul W. ; Hutchison, Alastair ; Otto, Randal A. / Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve. In: Journal of Applied Physiology. 1997 ; Vol. 83, No. 1. pp. 89-94.
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