LING 290 Chapter Notes - Chapter 3: Internal Intercostal Muscles, Arytenoid Cartilage, Vocal Folds
1 Nov 2017
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Document Summary
Normally inhale-exhale ratio is about 50-50 but during speech it is 90% exhalation and. All this creates negative pressure which causes air to rush into the lungs. The lungs are able to deflate on their own because they are composed of elastic tissue. Relaxation of the inhalation muscles and contraction of the internal intercostal muscles and the abdominal muscles. Larynx= voice box: also helps maintain air pressure in the thoracic cavity which is why you hold your breath when you push (ie. giving birth). The air in the lungs provides extra muscular strength. Mandible= attached to hyoid bone with muscles. Vocal fold = located inside the larynx. Arytenoid cartilage= each vocal fold is connected separately to the: attached to the superior side of the cricoid cartilage. Subglottal pressure=when air enters the larynx applies pressure to the glottis: when the subglottal pressure is great enough it causes the vocal folds to be pushed apart.
