What happens after the swallow? Introducing the glottal release sound

Cichero, JAY and Murdoch, B. E. (2003) What happens after the swallow? Introducing the glottal release sound. Journal of Medical Speech-language Pathology, 11 1: 31-41.

Author Cichero, JAY
Murdoch, B. E.
Title What happens after the swallow? Introducing the glottal release sound
Journal name Journal of Medical Speech-language Pathology   Check publisher's open access policy
ISSN 1065-1438
Publication date 2003
Year available 2003
Sub-type Article (original research)
Volume 11
Issue 1
Start page 31
End page 41
Total pages 11
Place of publication Clifton Park, N.Y., U.S.
Publisher Delmar Cengage Learning
Collection year 2003
Language eng
Subject C1
321099 Clinical Sciences not elsewhere classified
730113 Digestive system and disorders
Abstract Cervical auscultation presents as a noninvasive screening assessment of swallowing. Until now the focus of acoustic research in swallowing has been the characterization of swallowing sounds,. However, it may be that the technique is also suitable for the detection of respiratory sounds post swallow. A healthy relationship between swallowing and respiration is widely accepted as pivotal to safe swallowing. Previous investigators have shown that the expiratory phase of respiration commonly occurs prior to and after swallowing. That the larynx is valved shut during swallowing is also accepted. Previous research indicates that the larynx releases valved air immediately post swallow in healthy individuals. The current investigation sought to explore acoustic evidence of a release of subglottic air post swallow in nondysphagic individuals using a noninvasive medium. Fifty-nine healthy individuals spanning the ages of 18 to 60+ years swallowed 5 and 10 milliliters (ml) of thin and thick liquid boluses. Objective acoustic analysis was used to verify presence of the sound and to characterize its morphological features. The sound, dubbed the glottal release sound, was found to consistently occur in close proximity following the swallowing sound. The results indicated that the sound has distinct morphological features and that these change depending on the volume and viscosity of the bolus swallowed. Further research will be required to translate this information to a clinical tool.
Keyword Clinical Neurology
Bolus Volume
Cervical Auscultation
Phase-relationships
Normal Adults
Coordination
Respiration
Viscosity
Pattern
Closure
Newborn
Q-Index Code C1

 
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Created: Tue, 14 Aug 2007, 19:15:19 EST