Purpose Deficiencies in swallowing (aspiration) and in maximum vocal pitch elevation have been shown to correlate in dysphagia. However, the underlying mechanisms that may explain this relationship are not known. In this study, we compare hyoid kinematics between swallowing and maximum vocal pitch elevation in healthy adults. Method Ten young ( M = 21 ± 1.33 years) and eight older ( M = 72.85 ± 5.59 years) healthy adults completed trials of maximum vocal pitch elevation (vowels /a/ and /i/) and swallowing (thin liquid and pudding) under videofluoroscopy. Superior and anterior hyoid excursions were obtained using kinematic analysis. Two-way analyses of variance and Spearman rho correlations were used to examine differences and relationships between swallowing and maximum pitch elevation biomechanics. Results Superior hyoid excursion was significantly greater for liquid swallows compared to pitch elevation tasks (/a/ and /i/; p = .002; Cohen's d = 1.28; p = .0179, Cohen's d = 1.03, respectively) and for pudding swallows compared to pitch tasks ( p = .000, Cohen's d = 1.64; p = .001, Cohen's d = 1.38, respectively). Anterior hyoid excursion was not significantly different between the two functions, but was overall reduced in the older group ( p = .0231, Cohen's d = .90). Furthermore, there was a moderate positive correlation between the degree of superior excursion during liquid swallows and maximum pitch elevation for both vowels ( r s = .601, p = .001; r s = .524, p = .003) in young adults, and between the degree of anterior excursion during liquid swallows and pitch elevation for both vowels ( r s = .688, p = .001; r s = .530, p = .008) in older adults. Conclusions Swallowing and maximum pitch elevation require similar anterior, but not superior, hyoid excursion in healthy adults. Differential correlations between the two tasks for each age group may be associated with age-related muscle changes. We provide evidence of partially shared biomechanics between swallowing and maximum pitch elevation.

中文翻译：

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确定吞咽与最大音高升高之间的潜在关系：健康成人舌骨生物力学的初步研究

目的吞咽（误吸）和最大音调升高的缺陷已被证明与吞咽困难相关。然而，解释这种关系的潜在机制尚不清楚。在这项研究中，我们比较了健康成年人吞咽和最大音高升高之间的舌骨运动学。 方法十个年轻人（中号= 21 ± 1.33 岁）和八岁以上（中号= 72.85 ± 5.59 岁）健康成年人在电视透视下完成了最大音高升高（元音 /a/ 和 /i/）和吞咽（稀液体和布丁）的试验。使用运动学分析获得上舌骨和前舌骨偏移。使用方差和 Spearman rho 相关性的双向分析来检查吞咽和最大俯仰高度生物力学之间的差异和关系。 结果与俯仰抬高任务相比，液体吞咽的优越舌骨偏移明显更大（/a/和/i/；p= .002；科恩的d= 1.28；p= .0179，科恩的d= 1.03，分别）以及布丁燕子与投球任务相比（p= .000，科恩的d= 1.64;p= .001，科恩的d= 1.38，分别）。舌骨前移在两种功能之间没有显着差异，但在老年组中总体减少（p= .0231，科恩的d= .90)。此外，液体吞咽期间的优越偏移程度与两个元音的最大音高高度之间存在中度正相关性（r s= .601,p= .001；r s= .524,p= .003) 在年轻人中，以及液体吞咽期间的前移程度和两个元音的音调升高之间(r s= .688,p= .001；r s= .530,p= .008) 在老年人中。 结论健康成年人吞咽和最大俯仰高度需要类似的前舌骨偏移，但不需要上舌骨偏移。每个年龄组的两项任务之间的差异相关性可能与年龄相关的肌肉变化有关。我们提供了吞咽和最大俯仰高度之间部分共享生物力学的证据。