Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve

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

Producción científica: Articlerevisión exhaustiva

25 Citas (Scopus)


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.

Idioma originalEnglish (US)
Páginas (desde-hasta)89-94
Número de páginas6
PublicaciónJournal of applied physiology
EstadoPublished - jul 1997
Publicado de forma externa

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)


Profundice en los temas de investigación de 'Motor innervation of the cricopharyngeus muscle by the recurrent laryngeal nerve'. En conjunto forman una huella única.

Citar esto