OBJECTIVES/HYPOTHESIS Unilateral vocal fold paralysis with no preceding causes is diagnosed as idiopathic unilateral vocal fold paralysis. However, comprehensive guidelines for evaluating the defining characteristics of idiopathic unilateral vocal fold paralysis are still lacking. In the present study, we hypothesized that idiopathic unilateral vocal fold paralysis may have different clinical a...

normal 0 false false false en-us x-none ar-sa laryngocele is an air-filled, abnormal dilation of the laryngeal saccule that extends upward within the false vocal fold, in communication with the laryngeal lumen. a case of 43-year-old male with bilateral internal laryngoceles, who has been treated as asthma for 4 years, is presented. the patient had dyspnea, cough, and excessive phlegm for a mont...

The aim of this chapter is to provide an overview of laryngeal anatomy and physiology, characteristics of vocal fold motion, transformation of vocal fold vibration to sound, and mechanisms of vocal fold vibration. Throughout the chapter computational models have been used for demonstration purposes to generate examples of vocal fold motion and resulting waveforms representing various quantities.

Although it is known vocal fold adduction is achieved through laryngeal muscle activation, it is still unclear how interaction between individual laryngeal muscle activations affects vocal fold adduction and vocal fold stiffness, both of which are important factors determining vocal fold vibration and the resulting voice quality. In this study, a three-dimensional (3D) finite element model was ...

Paradoxical Vocal Fold Movement Disorder is where the larynx exhibits paradoxical vocal cords closure during respiration, creating partial airway obstruction. Causes of vocal fold movement disorder are multifactorial, and patients describe tightness of throat, difficulty getting air in, have stridor, and do not respond to inhalers. We propose using transnasal laryngoscopy examination, which wil...