title: Tongue-pressure and hyoid movement timing in healthy liquid swallowing.
abstract: It was hypothesized that tongue-palate pressure generation might directly facilitate hyoid movement in swallowing through the anatomical connections of the extrinsic tongue muscles. If true, non-invasive measures of tongue-palate pressure timing might serve as a proxy measure of hyoid excursion. The timing relationships between events in the tongue-palate pressure and hyoid movement profiles during water and nectar-thick liquid swallowing in healthy adults were explored. Concurrent intra-oral manometry and submental B-mode midsagittal ultrasound were recorded. It was determined that there is no obligate sequence in the onsets, or offsets, of tongue-palate pressures and hyoid excursion. Timing lags (either of hyoid movement lagging tongue-palate pressures or vice versa) fell within 0.5 s, on average. It is concluded that tongue-palate pressure generation and hyoid movement are separate phenomena in the swallowing sequence and that non-invasive measures of tongue-pressure timing cannot be used reliably as proxy measures of hyoid movement timing.
authors.affiliation: Toronto Rehabilitation Institute, Toronto, ON, Canada. steele.catriona@torontorehab.on.ca
authors.forename: Catriona
authors.initials: C
authors.lastname: Steele
authors.forename: Caroline
authors.initials: C
authors.lastname: Sasse
authors.forename: Tim
authors.initials: T
authors.lastname: Bressmann
mesh_terms: D000328:Adult; D003679:Deglutition / Q000502:physiology*; D005260:Female; D006801:Humans; D006928:Hyoid Bone / Q000000981:diagnostic imaging / Q000502:physiology*; D008297:Male; D008365:Manometry / Q000379:methods / Q000592:standards*; D009068:Movement / Q000502:physiology; D010159:Palate / Q000000981:diagnostic imaging / Q000502:physiology; D011312:Pressure; D012016:Reference Values; D015203:Reproducibility of Results; D013997:Time Factors; D014059:Tongue / Q000000981:diagnostic imaging / Q000502:physiology*; D014463:Ultrasonography / Q000379:methods / Q000592:standards*; D014867:Water; D055815:Young Adult
chemical_list: D014867:Water