title: Sequential coordination between lingual and pharyngeal pressures produced during dry swallowing.
abstract: The aim of this study was to investigate oropharyngeal pressure flow dynamics during dry swallowing in ten healthy subjects. Tongue pressure (TP) was measured using a sensor sheet system with five measuring points on the hard palate, and pharyngeal pressure (PP) was measured using a manometric catheter with four measuring points. The order and correlations of sequential events, such as onset, peak, and offset times of pressure production, at each pressure measuring point were analyzed on the synchronized waveforms. Onset of TP was earlier than that of PP. The peak of TP did not show significant differences with the onset of PP, and it was earlier than that of PP. There was no significant difference between the offset of TP and PP. The onset of PP was temporally time-locked to the peak of TP, and there was an especially strong correlation between the onset of PP and TP at the posterior-median part on the hard palate. The offset of PP was temporally time-locked to that of TP. These results could be interpreted as providing an explanation for the generation of oropharyngeal pressure flow to ensure efficient bolus transport and safe swallowing.
authors.affiliation: Department of Speech-Language-Hearing Therapy, Rehabilitation Center, Kawasaki Medical School Hospital, 577 Matsushima, Kurashiki, Okayama 701-0114, Japan ; Department of Occlusal and Oral Functional Rehabilitation, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-4 Shikata-cho, Kita-ku, Okayama 700-8525, Japan.
authors.forename: Jitsuro
authors.initials: J
authors.lastname: Yano
authors.affiliation: Department of Rehabilitation Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Aoyagi
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ono
authors.affiliation: Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Hori
authors.affiliation: Physiological Function Research Center, Kawasaki Medical School Hospital, 577 Matsushima, Kurashiki, Okayama 701-0114, Japan.
authors.forename: Wakami
authors.initials: W
authors.lastname: Yamaguchi
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Fujiwara
authors.affiliation: Department of Sensory Science, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama 701-0193, Japan.
authors.forename: Isami
authors.initials: I
authors.lastname: Kumakura
authors.affiliation: Department of Occlusal and Oral Functional Rehabilitation, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-4 Shikata-cho, Kita-ku, Okayama 700-8525, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Minagi
authors.affiliation: Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama 701-0193, Japan.
authors.forename: Akio
authors.initials: A
authors.lastname: Tsubahara
mesh_terms: D000328:Adult; D003679:Deglutition / Q000502:physiology*; D049631:Esophageal Sphincter, Upper / Q000502:physiology; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009960:Oropharynx / Q000502:physiology*; D010609:Pharyngeal Muscles / Q000502:physiology; D011312:Pressure; D014059:Tongue / Q000502:physiology*