TY - JOUR
T1 - The sequence of swallowing events during the chin-down posture
AU - Young, Jennifer L.
AU - Macrae, Phoebe
AU - Anderson, Cheryl
AU - Taylor-Kamara, Isha
AU - Humbert, Ianessa A.
N1 - Funding Information:
Funding for this investigation was provided by the National Institute on Deafness and Other Communication Disorders and the National Center for Medical Rehabilitation Research (5K23DC010776-05, 1R01DC01428501A1), as well as the American Heart Association (14BGIA20380348).
Publisher Copyright:
© 2015 American Speech-Language-Hearing Association.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Purpose: This study investigated the effect of the chin down posture on the sequence of swallowing events in healthy adults. Method: Sixteen healthy participants performed 45 5-ml thin liquid swallows during video fluoroscopy: 5 neutral head position, 30 chin-down posture, and then 10 neutral head position. Eight swallowing events were measured: the time of hyoid burst, bolus head in the pharynx, bolus tail in the pharynx, laryngeal vestibule closure (LVC), upper esophageal sphincter (UES) opening, bolus head in the UES, bolus tail exiting the pharynx, and laryngeal vestibule opening (LVO). Results: Our key finding is that LVC was one of the first 3 swallowing events in 69% of neutral swallows and in 78% of chin-down swallows (p = .006). Also, LVO occurred last in 14% of chin-down swallows but never occurred last in the preceding neutral swallows (p ≤ .001). Thus, in chin-down swallows, LVC occurred earlier and LVO occurred later. Conclusions: The chin-down posture may be beneficial for individuals with delayed onset of LVC and reduced duration of the LVC. Future studies are needed to examine this effect in individuals with dysphagia.
AB - Purpose: This study investigated the effect of the chin down posture on the sequence of swallowing events in healthy adults. Method: Sixteen healthy participants performed 45 5-ml thin liquid swallows during video fluoroscopy: 5 neutral head position, 30 chin-down posture, and then 10 neutral head position. Eight swallowing events were measured: the time of hyoid burst, bolus head in the pharynx, bolus tail in the pharynx, laryngeal vestibule closure (LVC), upper esophageal sphincter (UES) opening, bolus head in the UES, bolus tail exiting the pharynx, and laryngeal vestibule opening (LVO). Results: Our key finding is that LVC was one of the first 3 swallowing events in 69% of neutral swallows and in 78% of chin-down swallows (p = .006). Also, LVO occurred last in 14% of chin-down swallows but never occurred last in the preceding neutral swallows (p ≤ .001). Thus, in chin-down swallows, LVC occurred earlier and LVO occurred later. Conclusions: The chin-down posture may be beneficial for individuals with delayed onset of LVC and reduced duration of the LVC. Future studies are needed to examine this effect in individuals with dysphagia.
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U2 - 10.1044/2015_AJSLP-15-0004
DO - 10.1044/2015_AJSLP-15-0004
M3 - Article
C2 - 26225454
AN - SCOPUS:84981730810
SN - 1058-0360
VL - 24
SP - 659
EP - 670
JO - American journal of speech-language pathology
JF - American journal of speech-language pathology
IS - 4
ER -