title: Effect of carbon dioxide in carbonated drinks on linguapalatal swallowing pressure.
abstract: This study aimed to investigate the influence of carbonated drinks with gas volumes (GV) of 0, 1.5, and 2.7 on linguapalatal swallowing pressure, intraoral carbonation perception, and maximum velocity of a bolus through the pharynx in healthy volunteers (N = 20, all female, age range; 20-21 years). The volunteers swallowed a 12-mL drink in the natural state. Linguapalatal swallowing pressure was measured using a special sensor sheet, and maximum velocity of the bolus through the pharynx was measured using ultrasonic diagnostic imaging equipment. Peak magnitude, integrated value, and duration of linguapalatal swallowing pressure and maximum velocity of a liquid bolus through the pharynx increased with an increase in carbon dioxide content in the carbonated drink. The total integrated values of carbonated drinks with GV of 1.5 and 2.7 were larger than that of the drink without carbon dioxide. These results suggest that the carbon dioxide dissolved in carbonated drinks influences the activity of taste receptors in the mouth and results in neuromotor responses.
authors.affiliation: Showa Women's University, Graduate School of Human Life Science, 1-7 Taishido, Setagaya-ku, Tokyo 154-8533, Japan. moritaka@swu.ac.jp.
authors.forename: Hatsue
authors.initials: H
authors.lastname: Moritaka
authors.forename: Masami
authors.initials: M
authors.lastname: Kitade
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Sawamura
authors.forename: Takanobu
authors.initials: T
authors.lastname: Takihara
authors.forename: Izumi
authors.initials: I
authors.lastname: Awano
authors.forename: Takahiro
authors.initials: T
authors.lastname: Ono
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tamine
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Hori
mesh_terms: D002245:Carbon Dioxide / Q000008:administration & dosage* / Q000032:analysis; D002253:Carbonated Beverages / Q000032:analysis*; D003679:Deglutition / Q000187:drug effects / Q000502:physiology*; D005260:Female; D006801:Humans; D010159:Palate / Q000187:drug effects / Q000502:physiology; D010614:Pharynx / Q000187:drug effects / Q000502:physiology; D011312:Pressure; D013649:Taste / Q000502:physiology; D014059:Tongue / Q000187:drug effects / Q000502:physiology; D055815:Young Adult
chemical_list: D002245:Carbon Dioxide
keywords: air bubbles; carbonated drink; gas volume of carbonated drink; swallowing; tongue pressure; velocity through pharynx