Electromyographic activity from human laryngeal, pharyngeal, and submental muscles during swallowing
1 Department of Speech and Hearing Science, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820; 2 Center for Digestive Disease, Farmington, New Mexico 87401; and 3 Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 5224...
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Veröffentlicht in: | Journal of applied physiology (1985) 1999-05, Vol.86 (5), p.1663-1669 |
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Sprache: | eng |
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Zusammenfassung: | 1 Department of Speech and
Hearing Science, University of Illinois at Urbana-Champaign,
Champaign, Illinois 61820;
2 Center for Digestive
Disease, Farmington, New Mexico 87401; and
3 Department of
Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals
and Clinics, Iowa City, Iowa 52240
The durations and temporal relationships of
electromyographic activity from the submental complex, superior
pharyngeal constrictor, cricopharyngeus, thyroarytenoid, and
interarytenoid muscles were examined during swallowing of saliva and of
5- and 10-ml water boluses. Bipolar, hooked-wire electrodes were
inserted into all muscles except for the submental complex, which was
studied with bipolar surface electrodes. Eight healthy, normal,
subjects produced five swallows of each of three bolus volumes for a
total of 120 swallows. The total duration of electromyographic activity
during the pharyngeal stage of the swallow did not alter with bolus
condition; however, specific muscles did show a volume-dependent change
in electromyograph duration and time of firing. Submental muscle activity was longest for saliva swallows. The
interarytenoid muscle showed a significant difference in duration
between the saliva and 10-ml water bolus. Finally, the interval between
the onset of laryngeal muscle activity (thyroarytenoid, interarytenoid) and of pharyngeal muscle firing patterns (superior pharyngeal constrictor onset, cricopharyngeus offset) decreased as bolus volume
increased. The pattern of muscle activity associated with the swallow
showed a high level of intrasubject agreement; the presence of somewhat
different patterns among subjects indicated a degree of population variance.
deglutition; electromyography; pharynx; larynx |
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ISSN: | 8750-7587 1522-1601 |
DOI: | 10.1152/jappl.1999.86.5.1663 |