XROMM and diceCT reveal a hydraulic mechanism of tongue base retraction in swallowing

Author:

Orsbon Courtney P.,Gidmark Nicholas J.,Gao Tingran,Ross Callum F.

Abstract

AbstractDuring primate swallowing, tongue base retraction (TBR) drives the food bolus across the oropharynx towards the esophagus and flips the epiglottis over the laryngeal inlet, protecting against penetration and aspiration of food into the airway. Despite the importance of TBR for swallowing performance, the mechanics of TBR are poorly understood. Using biplanar videoradiography (XROMM) of four macaque monkeys, we tested the extrinsic muscle shortening hypothesis, which posits that shortening of the hyoglossus and styloglossus muscles pulls the tongue base posteriorly, and the muscular hydrostat or intrinsic tongue muscle hypothesis, which suggests that, because the tongue is composed of incompressible fluid, intrinsic muscle shortening increases tongue length and displaces the tongue base posteriorly. Our data falsify these hypotheses. Instead we suggest a novel hydraulic mechanism of TBR: shortening and rotation of suprahyoid muscles compresses the tongue between the hard palate, hyoid and mouth floor, squeezing the midline tongue base and food bolus back into the oropharynx. Our hydraulic mechanism is consistent with available data on human tongue swallowing kinematics. Rehabilitation for poor tongue base retraction might benefit from including suprahyoid muscle exercises during treatment.

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

Reference63 articles.

1. McConnel, F. M. S. Analysis of pressure generation and bolus transit during pharyngeal swallowing. Laryngoscope 98, 71–78 (1988).

2. Dejaeger, E., Pelemans, W., Ponette, E. & Joosten, E. Mechanisms involved in postdeglutition retention in the elderly. Dysphagia 12, 63–67 (1997).

3. Knigge, M. A. & Thibeault, S. Relationship between tongue base region pressures and vallecular clearance. Dysphagia 31, 391–397 (2016).

4. Pearson, W. G., Taylor, B. K., Blair, J. & Martin-Harris, B. Computational analysis of swallowing mechanics underlying impaired epiglottic inversion. Laryngoscope 126, 1854–8 (2016).

5. Hiiemae, K. & Crompton, A. Mastication, food transport, and swallowing in Functional Vertebrate Morphology (eds. Mildebrand, M., Bramble, D. M., Liem, K. F. & Wake, D. B.) (Belknap Press, 1985).

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