| Term | Definition |
|---|
| vocal ligament | strengthens medial edge of vocal fold, prevents excess elongation |
| thyrohyoid membrane | seals space between thyroid cartilage and hyoid bone |
| cricothyroid membrane | seals space between cricoid and thyroid cartilages |
| cricothyroid ligament | limits range of motion |
| conus elasticus | strengthens bottom of vocal folds and seals them to airway below |
| aryepiglottic fold | collar of larynx |
| false (ventricular) vocal folds | evolutionary vestige |
| laryngeal ventricles | secretion of mucus; resonator; source of aerodynamic turbulence that assists with glottal closure |
| How is pitch controlled, what what issues might exist that consern air/breath pressure? | 1) Pitch is lowered by TA muscle. It contracts to shorten and thicken the vocal folds, reducing their tension and increasing mass (per unit length). 2) Pitch raising: CT muscles make vocal folds longer, thinner, and stiffer, requiring increased subglottal breath pressure to sustain vibration. 3) Intensity control: expiratory muscles/adductor muscles (LCA/IA)/TA- pulmonary system increases subglottal air pressure while adductors tighten to increase glottal resistance and TA contracts to enlarge vibrating margin of vocal folds, increasing the mass (per unit length) |
| Four factors that contribute to glottis closing during oscillation: | 1) decreasing air pressure, 2) contractions of LCA muscles; 3) contraction of oblique IA muscles, 4) contraction of transverse IA muscles |
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