06 June 2015 : Clinical Research
Application of B+M-Mode Ultrasonography in Assessing Deglutitive Tongue Movements in Healthy Adults
Changtian LiABCDEF, Junlai LiABCDEF, Changsheng ZhangBCDEF, Xiaolin CaoBCDE, Nan LiBCDE, Danfei SongBCD, Tengfei YuBCFDOI: 10.12659/MSM.893591
Med Sci Monit 2015; 21:1648-1655
Abstract
BACKGROUND: The purpose of this study was to evaluate tongue movements during swallowing in healthy adults using the B+M-mode ultrasonography, and to determine a common feature in the M-mode traces for quantitative measurement and individual comparison of tongue movements.
MATERIAL AND METHODS: Ninety healthy subjects were divided into 3 groups according to age (20–39, 40–59, and 60–80 years). The tongue movements during 3 saliva swallows were examined using real-time B+M-mode ultrasonography. The M-mode traces of tongue movements were recorded and evaluated.
RESULTS: Both intra-individual and inter-individual differences were detected in the M-mode traces during the 3 saliva swallows. Characteristic types were seen during the individual swallowing phases of M-mode traces: 2 activity types in phase I, 2 types in phase IIb, and 3 types in phase III. However, no variations were seen during phase IIa, in which all subjects displayed a continuous upsloping trace. The average range of swallow-related tongue radial displacement during phase IIa decreased gradually with age, while the average duration of tongue movement during phase IIa increased gradually with age. These 2 trends were not statistically significant across age groups. However, differences between sexes were found in both the range of tongue radial displacement and the duration of deglutitive lingual actions during phase IIa in all 3 age groups (P<0.05).
CONCLUSIONS: B+M-mode ultrasonography may offer a quick and safe alternative for the preliminary evaluation of deglutitive tongue movements.
Keywords: Analysis of Variance, Deglutition - physiology, Tongue - ultrasonography, Ultrasonography - methods
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