Dynamic movement of the air tract fluid lubricating the larynx at the start and end of the phonation, in correlation with repeated phonation and swallowing
| Autor: | Tadashi Fujioka, Yoshihisa Kawasaki, Hiroyuki Fukuda, Tohru Tsuzuki, Shigeji Saito, Shigeru Kano, Kazuaki Oki, Koichi Kita, Masahiro Kawaida |
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| Rok vydání: | 1989 |
| Předmět: | |
| Zdroj: | Nihon Kikan Shokudoka Gakkai Kaiho. 40:24-30 |
| ISSN: | 1880-6848 0029-0645 |
| DOI: | 10.2468/jbes.40.24 |
| Popis: | Experiments using the excised canine larynges and experimental air tract fluid were conducted to clarify the dynamic movement of the air tract fluid to lubricate the larynx at the start and end of the phonation. And clinical observations by use of laryngostrobovideography were also conducted to investigate the correlation between the dynamic movement of the air tract fluid and repeated phonation or swallowing.From the results obtained, it is revealed that the air tract fluid from the subglottis comes up on the glottis at the moment of the onset of phonation. The fluid from the subglottis is then mixed with the fluid on the glottis. The mixed fluid forms a rotating fluid column on the upper surface of vocal folds laterally. At the end of the phonation, the column decomposes and mostly flows backward to the subglottis, lubricating the whole vocal folds. And the amount of the air tract fluid on the glottis increases with repeated phonation ; the excessive air tract fluid on the glottis is excreted into the esophagus by swallowing. |
| Databáze: | OpenAIRE |
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