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SLHS 2203 Exam 3a
Phonation
| Term | Definition |
|---|---|
| Larynx | A musculo-cartilaginous structure at the upper end of the trachea |
| Cricoid & Thyroid | Articulate by means of the cricothyroid joint and muscle that lets the two cartilages come closer together in the front |
| Cricoid & Arytenoid | Articulate by means of the cricoarytenoid joint (and muscles) that allows a large range of arytenoid movement |
| Epiglottis | Attaches to the thyroid cartilage and hyoid bone |
| Corniculate | Rest on the upper surface of the arytenoids to aid movement |
| Cuneiform | Reside within the aryepiglottic folds to reinforce and support |
| Posterior cricoarytenoid | Abductor muscle - opens the vocal folds |
| Lateral cricoarytenoid, Transverse arytenoid, & Oblique arytenoid | Adductor muscles - close the vocal folds |
| Cricothyroid, Thyroarytenoid, & Vocalis | Three muscles change the length and tension of the vocal folds |
| Phonation | The production of voice by vibrating the vocal folds within the larynx |
| Bernoulli Principle | Given flow of air at a constant volume, at a point of constriction, there will be a decrease in pressure perpendicular to the flow and an increase in the velocity of the flow |
| Subglottal pressure, tissue elasticity, & constriction | Produces sustained phonation |
| Normal Phonation Requirements | Breath support, Vibratory edges of the vocal folds aligned & have a small gap, Physical properties of the vocal folds should be conducive to vibration, 3D contour of the vocal folds should be favorable, Control of glottic length, tension, & shape |
| Organic Voice Disorders | Physiological voice disorders that result from changes in respiratory, laryngeal, or vocal tract mechanisms |
| Structural Voice Disorders | Organic voice disorders that result from physical changes in the vocal mechanism |
| Neurogenic Voice Disorders | Organic voice disorders that result from problems with the central or peripheral nervous system innervation to the larynx that affect functioning of the vocal mechanism |
| Functional Voice Disorders | Voice disorders that result from inefficient use of the vocal mechanism when the physical structure is normal |
| Creaky phonation (vocal fry) | Posterior part of the vocal folds held tightly together & anterior part is vibrating at a slow rate |
| Video stroboscopy | A technique used to image the movements of the vocal folds using a flexible (or rigid) endoscope combined with a strobe light correlated to vocal fold vibration |
| Phonatory System | Production of vocal sound using the laryngeal structures (larynx) |
| Glottis | The space between the vocal folds |
Created by:
jamiesz
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