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Effects of chin‐up posture on the sequence of swallowing events
Author(s) -
Calvo Irene,
Sunday Kirstyn L.,
Macrae Phoebe,
Humbert Ianessa A.
Publication year - 2017
Publication title -
head and neck
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.012
H-Index - 127
eISSN - 1097-0347
pISSN - 1043-3074
DOI - 10.1002/hed.24713
Subject(s) - chin , swallowing , dysphagia , medicine , bolus (digestion) , anatomy , orthodontics , dentistry , surgery
Background Chin‐up posture is frequently used to manage oral dysphagia after head and neck cancer. This prospective study investigates the effects of chin‐ups on the sequence of pharyngeal swallowing events. Methods Twelve healthy young adults performed 45 consecutive swallows of 5 mL water across 3 phases on videofluoroscopy: 5 swallows in the neutral head position; 30 swallows during chin‐up posture; and 10 swallows in the neutral head position. Swallowing kinematic and bolus flow measures for 9 swallowing events were recorded. Linear trends were analyzed across 30 chin‐up swallows; pairwise comparison was used to compare the 3 phases. Results Time to hyoid peak and laryngeal vestibule closure changed abruptly during chin‐up swallowing compared to the initial neutral position. No measure changed across 30 chin‐up swallows. Time of hyoid burst decreased upon returning to the neutral position. Conclusion Our findings indicate that chin‐up posture challenges the pharyngeal sequence of events for both swallowing kinematics and bolus flow. © 2017 Wiley Periodicals, Inc. Head Neck 39: 947–959, 2017