MEDI7212 Lecture Notes - Lecture 37: Synovial Joint, Internal Carotid Artery, Speech Production
Document Summary
"urge-to-cough sensation" may be related to subthreshold ap levels or different afferent pathway. Cough reflex: rapid inspiration of air (up to 2. 5l, epiglottis closes and vocal cords shut tightly (trap air in lungs) Forceful contraction of abdominal muscles (push against diaphragm) and other expiratory muscles (intercostals) increase pressure in lungs (eg 100mmhg: vocal cords and epiglottis suddenly open widely leading to expulsion of air under high pressure at high velocities. Larynx: adequate function of the larynx - ability to close glottis and vocal cords is important for the cough reflex (and also swallowing otherwise increased risk of aspiration of foreign material) Function: swallowing, respiration, complications, airway obstruction, aspiration and subsequent pneumonia. Cartilage: arytenoid cartilage, paired, pyramidal cartilages that rest atop the cricoid cartilage. Facilitate and control movement of the vocal fold: vocal process (posterior attachment to vocal fold, muscular process (attachent of muscles)
