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Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve.

Publication ,  Journal Article
Hammond, CS; Davenport, PW; Hutchison, A; Otto, RA
Published in: J Appl Physiol (1985)
July 1997

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.

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Published In

J Appl Physiol (1985)

DOI

ISSN

8750-7587

Publication Date

July 1997

Volume

83

Issue

1

Start / End Page

89 / 94

Location

United States

Related Subject Headings

  • Sheep
  • Recurrent Laryngeal Nerve
  • Physiology
  • Pharyngeal Muscles
  • Motor Neurons
  • Electromyography
  • Electric Stimulation
  • Deglutition
  • Animals
  • Action Potentials
 

Citation

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Hammond, C. S., Davenport, P. W., Hutchison, A., & Otto, R. A. (1997). Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve. J Appl Physiol (1985), 83(1), 89–94. https://doi.org/10.1152/jappl.1997.83.1.89
Hammond, C. S., P. W. Davenport, A. Hutchison, and R. A. Otto. “Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve.J Appl Physiol (1985) 83, no. 1 (July 1997): 89–94. https://doi.org/10.1152/jappl.1997.83.1.89.
Hammond CS, Davenport PW, Hutchison A, Otto RA. Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve. J Appl Physiol (1985). 1997 Jul;83(1):89–94.
Hammond, C. S., et al. “Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve.J Appl Physiol (1985), vol. 83, no. 1, July 1997, pp. 89–94. Pubmed, doi:10.1152/jappl.1997.83.1.89.
Hammond CS, Davenport PW, Hutchison A, Otto RA. Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve. J Appl Physiol (1985). 1997 Jul;83(1):89–94.

Published In

J Appl Physiol (1985)

DOI

ISSN

8750-7587

Publication Date

July 1997

Volume

83

Issue

1

Start / End Page

89 / 94

Location

United States

Related Subject Headings

  • Sheep
  • Recurrent Laryngeal Nerve
  • Physiology
  • Pharyngeal Muscles
  • Motor Neurons
  • Electromyography
  • Electric Stimulation
  • Deglutition
  • Animals
  • Action Potentials