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Phonation

WVSOM -- Biomechanics of Phonation + swallowing

QuestionAnswer
What are the 9 cartilages of the larynx? thyroid, cricoid, epiglottic, arytenoids (2), corniculates (2), and cuneiform (2)
What are the vertebral levels of the larynx? C3-6
What is the function of the larynx? phonation and guarding the airway
What does the lateral cricoarytenoid m do? adducts the vocal folds
What does the arytenoid mm do? adducts the arytenoid cartilege
What dos the posterior cricoarytenoid do? abducts the vocal folds, allows for whispering and breathing
What muscles act as the sphincter of the phayrnx? combination of teh lateral cricoarytenoid, arytenoids and the aryepiglottic mm to pull arytenoid cartilages toward the epicglottis
When are the sphnicter muscles important? swallowing
what is the function of the cricothyroid mm? tilts the thyroid anteriorly to raise the pitch of the voice. Increases the length of and tightens teh vocal fold
What innervates the cricothyroid mm? external layrengeal n.
What is the function of the thyroarytenoid mm? lowers pitch but shortening and relaxing teh vocal folds by pulling the arytenoids anteriorly
What is the function of the vocalis? selectively tense and relaxes parts of the vocal ligaments
What nerve innervates all of the intrinsic muscles of teh pharynx except the cricothyroid mm.? inferior laryngeal n.
What are the two branches of the inferior laryngeal n? internal and external laryngeal n
What does the internal laryngeal n innervate? sensory to the vestibule and middle cavity
What artery does the internal laryngeal n travel with? superior laryngeal a.
What does the external laryngeal n innervate? motor to crico thyroid and contributes to teh pharyngeal plexus
What artery does the external laryngeal n travel with? superior thyroid a.
What does the inferior layrngeal n innervate? sensory to infraglottic cavity
What artery does the inferior laryngeal n. travel with? inferior laryngeal a.
What are the two branches of teh inferior laryngeal n? posterior and anterior brnaches
What does the anterior branch of the inferior pharyngeal n. innervate? motor to all intrinsic muscles except cricoarytenoid and arytenoid
What does teh posterior branch of the inferior pharyngeal n. innervate? cricoarytenoid adn arytenoid
Where does the superior laryngeal a. travel? dives thru thyrohyoid membrane to larynx
What is the inferior laryngeal artery a branch of? inferior thyroid a.
How do the veins of the larynx travel? accompany arteries
Where does the superior laryngeal v. drain? into sup. thyroid v. and then into inf. vena cava
What does the inferior laryngeal v drain into? inferior thyroid and then into left brachiocephallic v.
What are teh lymphatics to the larynx superior to the vocal folds? superior deep cervcial lymph nodes
What are the lymphatics inferior to teh vocal folds? pretracheal and paratracheal lymph nodes to inferior deep cervical lymph nodes
What are the 6 steps to swallowing? move food with tongue, seal off nasal cavity, elevate adn enlarge pharynx, elevate hyoid and larynx, propel food, depress hyoid and layrnx, and relax UES
Created by: tjamrose