2005 Fiscal Year Final Research Report Summary
Evaluation of the deglutitive behavior from swallowing sounds
| Project/Area Number |
16591725
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Otorhinolaryngology
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| Research Institution | Kitasato University |
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Principal Investigator |
HORIGUCHI Satoshi Kitasato University, Department of Allied Health Sciences, Professor, 医療衛生学部, 教授 (30157078)
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| Project Period (FY) |
2004 – 2005
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| Keywords | swallowing sounds / deglutitive behavior / larynx / laryngeal endoscopy / electromyography / swallowing pressure |
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| Research Abstract |
PURPOSE
The aim of this study was to investigate the origin and mechanism of swallowing sounds by means of exploration of the relationship between the sounds and physiological data or events.
SUBJECTS
Seventeen adults (6 males and 11 females, from 21 to 50 years old) without any histories of swallowing disorders served as subjects.
METHODS
Swallowing sounds were recorded using an accelerometer placed on lateral border of trachea just below cricoid cartilage. Electromyography of suprahyoid muscles was obtained by surface electrodes. Swallowing pressure was recorded by a transnasally inserted 3ch-miniature catheter pressure transducer. A video camera was employed for recording the movements of laryngeal notch or endoscopic view of the larynx. Video signal and physiological data were monitored and synchoronously stored on the microcomputer for further analysis.
RESULTS
Results suggested follows.
(1)The temporal relationship between the onset of suprahyoid muscles activation and swallowing sounds was relatively stable in each subject but among subjects.
(2)The temporal relationship between the timing of maximum elevation of larynx and swallowing sounds was stable in each subject and among subjects.
(3)Although swallowing sounds were affected by head position, size and property bolus or repetitive swallows, the relaxation of cricopharyngeal muscle and swallowing sounds showed the strong temporal relationship.
(4)In some cases, fine wavy changes in cricopharyngeal pressure synchronized with swallowing sounds were observed, which suggested that swallowing sounds might be produced by the pressure changes with opening of upper esophageal inlet.
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