University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
J Speech Lang Hear Res. 2011 Aug;54(4):1022-38. doi: 10.1044/1092-4388(2010/10-0105). Epub 2010 Dec 20.
Digital kymography and vocal fold curve fitting are blended with detailed symmetry analysis of kymograms to provide a comprehensive characterization of the vibratory properties of injured vocal folds.
Vocal fold vibration of 12 excised canine larynges was recorded under uninjured, unilaterally injured, and bilaterally injured conditions. Kymograms were created at 25%, 50%, and 75% of the vocal fold length, and vibratory parameters were compared quantitatively among conditions and were studied with respect to right-left and anterior-posterior symmetries.
Anterior-posterior amplitude asymmetry was found in the bilateral condition. The unilateral condition showed significant right-left amplitude asymmetry, and it showed the lowest right-left phase symmetry among the conditions. In condition comparisons, vertical phase difference did not show significant differences among conditions, whereas amplitudes were significantly different among conditions at all line scan positions and most vocal fold lips. Significant differences in frequency were found among the conditions at all 4 vocal fold lips, with the bilateral condition exhibiting the greatest frequency.
Digital kymography and curve fitting provide detailed information about the vibratory behavior of injured vocal folds. Awareness of vibratory properties associated with vocal fold injury may aid in diagnosis, and the quantitative abilities of digital kymography may allow for objective treatment selection.
数字声门图和声带曲线拟合与声门图的详细对称性分析相结合，提供了对损伤性声带振动特性的全面描述。
在未损伤、单侧损伤和双侧损伤条件下，记录了 12 个切除的犬喉的声带振动。在声带长度的 25%、50%和 75%处创建声门图，并在条件之间定量比较振动参数，并研究其左右和前后对称性。
双侧条件存在前后振幅不对称。单侧条件显示出明显的左右振幅不对称，并且在所有条件中左右相位对称性最低。在条件比较中，垂直相位差在条件之间没有显著差异，而在所有线扫描位置和大多数声带唇处的振幅在条件之间存在显著差异。在所有 4 个声带唇处的条件之间都发现了频率的显著差异，双侧条件表现出最大的频率。
数字声门图和曲线拟合提供了有关损伤性声带振动行为的详细信息。对与声带损伤相关的振动特性的认识可能有助于诊断，数字声门图的定量能力可能允许进行客观的治疗选择。
