AbstractObjective To measure the maximum movement of the hyoid bone and ventriculus laryngis during normal swallowing. Methods Forty volunteers were selected as subjects, and an X-ray simulator was used to collect the videos of normal swallowing. Video analysis software was used to capture continuous and quick screenshots of these videos, and the maximum movement of the hyoid bone and ventriculus laryngis was measured. The difference in movement was analyzed by one-way analysis of variance. Results The mean time for swallowing in 40 volunteers was 1.13±0.28 s. During the process of swallowing, the hyoid bone and ventriculus laryngis moved upward first, then outward, and finally returned to the resting position. The maximum movement of the hyoid bone forward and backward was 0.90±0.30 cm;the maximum vertical movement of the hyoid bone was 0.93±0.36 cm. The maximum movement of the ventriculus laryngis forward and backward was 0.69±0.25 cm;the maximum vertical movement of the ventriculus laryngis was 1.04±0.45 cm. Further studies showed the effect of age on the time for swallowing (P=0.03), with similar Results for the male and female (P=0.13). Sex and age had no effects on movement of the hyoid bone and ventriculus laryngis (P=0.28-0.81 and 0.20-0.88). Conclusions During normal swallowing, the hyoid bone and the ventriculus laryngis move first upward and then forward. These movements should be considered during the development of radiotherapy plan for head and neck cancer.
Deng Chong,LIN Qin,Wu Qiong et al. Movement of the hyoid bone and ventriculus laryngis in normal swallowing[J]. Chinese Journal of Radiation Oncology, 2015, 24(6): 668-670.
Deng Chong,LIN Qin,Wu Qiong et al. Movement of the hyoid bone and ventriculus laryngis in normal swallowing[J]. Chinese Journal of Radiation Oncology, 2015, 24(6): 668-670.
[1] Robbins J,Hamilton JW,Lof GL, et al. Oropharyngeal swallowing in normal adults of different ages[J]. Gastroenterology,1992,103(3):823-829. [2] Ueda N, Nohara K, Kotani Y, et al. Effects of the bolus volume on hyoid movements in normal individuals[J]. J Oral Rehabil,2013,40(7):491-499.DOI:10.1111/joor.12060. [3] Nagy A, Molfenter SM, Peladeau-Pigeon M, et al. The effect of bolus volume on hyoid kinematics in healthy swallowing[J]. Biomed Res Int,2014,2014:738971.DOI:10.1155/2014/738971. [4] Ishida R, Palmer JB, Hiiemae KM. Hyoid motion during swallowing:factors affecting forward and upward displacement[J].Dysphagia,2002,17(4):262-272.DOI:10.1007/s00455-002-0064-5. [5] Kim Y, McCullough GH. Maximum hyoid displacement in normal swallowing[J].Dysphagia,2008,23(3):274-279.DOI:10.1007/s00455-007-9135-y. [6] Molfenter SM, Steele CM. Variation in temporal measures of swallowing:sex and volume effects[J]. Dysphagia,2013,28(2):226-233.DOI:10.1007/s00455-012-9437-6. [7] Yokoyama M, Mitomi N, Tetsuka K, et al. Role of laryngeal movement and effect of aging on swallowing pressure in the pharynx and upper esophageal sphincter[J]. Laryngoscope,2000,110(3 Pt 1):434-439.DOI:10.1097/00005537－200003000－00021. [8] Zu Y, Yang Z, Perlman AL. Hyoid displacement in post-treatment cancer patients:preliminary findings[J]. J Speech Lang Hear Res,2011,54(3):813-820.DOI:10.1044/1092－4388(2010/10-0077). [9] Yabunaka K, Sanada H, Sanada S, et al. Sonographic assessment of hyoid bone movement during swallowing:a study of normal adults with advancing age[J]. Radiol Phys Technol,2011,4(1):73-77.DOI:10.1007/s12194-010-0107-9. [10] Sia I, Carvajal P, Carnaby-Mann GD, et al. Measurement of hyoid and laryngeal displacement in video fluoroscopic swallowing studies:variability, reliability, and measurement error[J]. Dysphagia,2012,27(2):192-197.DOI:10.1007/s00455-011-9352-2. [11] Bradley JA, Paulson ES, Ahunbay E, et al. Dynamic MRI analysis of tumor and organ motion during rest and deglutition and margin assessment for radiotherapy of head-and-neck cancer[J].Int J Radiat Oncol Biol Phys,2011,81(5):e803-812.DOI:10.1016/j.ijrobp.2010.12.015.
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