Mucosal wave properties of a human vocal fold
Mucosal wave properties of a human vocal fold
复制标题
DOI：
--
复制
发表时间：
2007
影响因子：
--
通讯作者：
Arno Boessenecker;D. Berry;J. Lohscheller;U. Eysholdt;M. Doellinger
中科院分区：
文献类型：
--
作者：
Arno Boessenecker;D. Berry;J. Lohscheller;U. Eysholdt;M. Doellinger
本研究的目的是调查在实验室实验中，在各种发声条件下的粘膜波传播。特别是，重点是内侧和上级表面的声带，量化粘膜波传播的动力学，但一直相对较少的研究。使用切除的人半喉装置对声带的上级和内侧表面进行高速数字成像。表面动力学的特点和分化在各种发声条件。在持续的，流动诱导的振荡，声带粘膜位移，速度和加速度的局部最大值和特定的相位延迟声门周期进行了研究。进行统计分析，检查诱导流量，内收刺激，和声带长度的影响。为了给出概述，计算并讨论了完整系列的24个记录的总平均值。增加所施加的气流，产生更高的横向位移值以及更高的速度和加速度值。延长声带导致减少横向位移。粘膜波传播明显增加较高的流量，延长褶皱，和较高的内收力。执行总平均揭示了声带的上级和内侧表面的三维动力学行为。检测到下位和上级区域之间的动力学量的幅度显著增加。数据显示，声带的下部和上级区域之间相对于横向位移、速度和加速度存在近180度的相位延迟。垂直位移的相位延迟也存在，但不太明显。使用半喉的方法，粘膜波传播的特点和分化的上级和内侧表面的声带表面在一系列的发声条件。虽然对声带动力学与发声生理/病理学之间相关性的了解仍处于起步阶段，但这里提供的数据有助于建立这种联系。这些数据也是有用的物理和数值模型的声带振动的发展和评价。然而，由于只研究了一个喉，因此结果只能被视为初步结果。
The objective of this research was to investigate mucosal wave propagation in laboratory experiments, across a variety of phonatory conditions. In particular, the focus was on the medial and superior surface dynamics of the vocal fold, which quantify mucosal wave propagation, but have been relatively little studied. High-speed, digital imaging of the superior and medial surfaces of the vocal fold was performed using an excised human hemilarynx setup. Surface dynamics were characterized and differentiated across a variety of phonatory conditions. During sustained, flow-induced oscillation, the local maxima of vocal fold mucosal displacements, velocities and acceleration and their particular phase delays in the glottal cycle were investigated. Statistical analysis was performed, examining the influence of induced flow, adductory stimulation, and length of the vocal fold. To give an overview, the grand average values were computed and discussed for the complete series of 24 recordings. Increasing the applied airflow, yielded higher values for lateral displacements as well as higher velocity and acceleration values. Elongating the vocal fold resulted in decreased lateral displacements. The mucosal wave propagation apparently increased for higher flow, elongated folds, and higher adduction forces. Performing grand averages revealed the three-dimensional dynamical behavior over the superior and medial surface of the vocal fold. A significant increase in the amplitudes of the dynamical quantities between inferior and superior regions was detected. The data showed a nearly 180 degree phase delay between inferior and superior regions of the vocal fold with respect to lateral displacements, velocities, and accelerations. Phase delays for the vertical displacements were also present, but less pronounced. Using a hemilarynx methodology, mucosal wave propagation was characterized and differentiated over the superior and medial surfaces of the vocal fold surface across a range of phonatory conditions. While an understanding of the correlation between vocal fold dynamics and phonatory physiology/pathology is still in its infancy, the data presented here help to establish such connections. The data are also useful for the development and evaluation of physical and numerical models of vocal fold vibration. However, since only one larynx has been investigated the results have to be seen as preliminary.