Honda Tsuyoshi, Baba Takuro, Fujimoto Keiko, Goto Takaharu, Nagao Kan, Harada Masafumi, Honda Eiichi, Ichikawa Tetsuo
Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
Department of Radiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
PLoS One. 2016 Dec 13;11(12):e0168187. doi: 10.1371/journal.pone.0168187. eCollection 2016.
The purpose of this study was to characterize the swallowing sound and identify the process of sound generation during swallowing in young healthy adults.
Thirty-three healthy volunteers were enrolled and allocated into three experimental groups. In experiment 1, a microphone was attached to one of eight cervical sites in 20 subjects, participants swallowed 5 ml water, and the sound waveform was recorded. In experiment 2, 10 subjects swallowed either 0, 5, 10, or 15 ml water during audio recording. In addition, participants consumed the 5 ml bolus in two different cervical postures. In experiment 3, the sound waveform and videofluoroscopy were simultaneously recorded while the three participants consumed 5 ml iopamidol solution. The duration and peak intensity ratio of the waveform were analyzed in all experimental groups.
The acoustic analysis of the waveforms and videofluoroscopy suggested that the swallowing sound could be divided into three periods, each associated with a stage of the swallowing movement: the oral phase comprising posterior tongue and hyoid bone movement; the pharyngeal phase comprising larynx movement, hyoid bone elevation, epiglottis closure, and passage of the bolus through the esophagus orifice; and the repositioning phase comprising the return of the hyoid bone and larynx to their resting positions, and reopening of the epiglottis.
Acoustic analysis of swallowing sounds and videofluoroscopy suggests that the swallowing sound could be divided into three periods associated with each process of the swallowing movement: the oral phase comprising the posterior movement of the tongue and hyoid bone; the pharyngeal phase comprising the laryngeal movement, hyoid bone elevation, epiglottis closure, and the bolus passage to the esophagus orifice; and the repositioning phase comprising the repositioning of the hyoid bone and larynx, and reopening of the epiglottis.
本研究旨在描述年轻健康成年人吞咽声音的特征，并确定吞咽过程中的声音产生过程。
招募33名健康志愿者，将其分为三个实验组。在实验1中，在20名受试者的八个颈部位置之一附着一个麦克风，参与者吞咽5毫升水，并记录声音波形。在实验2中，10名受试者在音频记录期间吞咽0、5、10或15毫升水。此外，参与者以两种不同的颈部姿势吞咽5毫升团块。在实验3中，三名参与者吞咽5毫升碘帕醇溶液时，同时记录声音波形和荧光透视。对所有实验组的波形持续时间和峰值强度比进行分析。
波形的声学分析和荧光透视表明，吞咽声音可分为三个时期，每个时期与吞咽运动的一个阶段相关：口腔期包括后舌和舌骨运动；咽期包括喉部运动、舌骨抬高、会厌关闭以及团块通过食管口；重新定位期包括舌骨和喉部回到其静止位置以及会厌重新打开。
吞咽声音的声学分析和荧光透视表明，吞咽声音可分为与吞咽运动的每个过程相关的三个时期：口腔期包括舌和舌骨的向后运动；咽期包括喉部运动、舌骨抬高、会厌关闭以及团块通向食管口；重新定位期包括舌骨和喉部的重新定位以及会厌重新打开。
