Journal
ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY
Volume 123, Issue 3, Pages 174-182Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0003489414522975
Keywords
cricopharyngeus; deglutition; electromyography; high-resolution manometry; upper esophageal sphincter
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Funding
- NIH from the National Institute on Deafness and Other Communication Disorders [R21 DC011130A]
- NIH [DC010900, RR025012, RR023268]
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Objectives: We sought to determine whether the association between cricopharyngeus muscle activity and upper esophageal sphincter pressure may change in a task-dependent fashion. We hypothesized that more automated tasks related to swallow or airway protection would yield a stronger association than would more volitional tasks related to tidal breathing or voice production. Methods: Six healthy adult subjects underwent simultaneous intramuscular electromyography of the cricopharyngeus muscle and high-resolution manometry of the upper esophageal sphincter. Correlation coefficients were calculated to characterize the association between the time-linked series. Results: Cricopharyngeus muscle activity was most strongly associated with upper esophageal sphincter pressure during swallow and effortful exhalation tasks (r = 0.77 and 0.79, respectively; P <.01). The association was also less variable during swallow and effortful exhalation. Conclusions: These findings suggest a greater coupling for the more automatic tasks, and may suggest less coupling and more flexibility for the more volitional, voice-related tasks. These findings support the important role of central patterning for respiratory-and swallow-related tasks.
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