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335 11.1 Intrinsic Muscles of the Larynx

The flashcards below were created by user shanamd2011 on FreezingBlue Flashcards. Quiz iOS Android More intrinsic muscles of the larynx have both origin and insertion withint he larynx landmarks of the larynx 10 epiglottis aryepiglottic folds laryngeal aditus laryngeal vestibule vertricular folds / false vocal folds laryngeal ventricle true vocal folds conus elasticus glottis pyriform sinuses aryepiglottic folds membrane extending from arytenoid cartilages to epiglottis laryngeal aditus entryway into larynx laryngeal vestibule opening of larynx epiglottis and aditus but above the false vocal folds ventricular folds / false vocal folds located between the laryngeal vestibule and the laryngeal ventricle laryngeal ventricle lateral outpouching between true and false vocal folds true vocal folds = thyroarytenoid muscles = vocal ligaments = upward extension of the conus elasticus conus elasticus also known as the cricothyroid membrane glottis space between true vocal folds pyriform sinuses shallow depressions lateral to aryepiglottic folds at level of vocal folds structure of the vocal folds 5 layers 1. squamous epithelium - most superficial 2. lamina propria - superficial layer - intermediate layer - deep layer 3. thyrovocalis muscle squamous epithelium most superficial extremely thin layer glistening white portion aids in hdration by retention of fluid lamina propria comprised of 3 layers connective tissue superificial, intermediate, and deep layers suprficial layer of lamina propria very elastic made of elastin fibers AKA Reinke's space very susceptible to swelling intermediate layer of lamina propria elastic fibers deep layer of lamina propria collagen fibers thyrovocalis muscle deep to lamina propria bulk of the vocal folds layers of the vocal folds 4 mucosal epithelium (outer surface covering) superficial lamina propia (Reinke's space, covering) Intermediate and deep lamina propria (ligament) vocalis muscle (deep contractile tissue, body) thyroarytenoid thyrovocalis (vocalis) o - angle of the thyroid dorsal (inner) surface c - back ins - vocal process of the arytenoid f - independently relaxes vocal folds co-operatively tenses vocal folds inn - X vagus recurrent laryngeal branch thyroarytenoid thyromuscularis o - angle of the thyroid dorsal (inner) surface c - back ins - base and muscular process of the aytenoid f - relaxes the vocal folds inn - X vagus recurrent laryngeal branch posterior cricoaytenoid only glottal lateral and medial bunches o - posterior lamina of the cricoid c - obliquely up ins - muscular process of the arytwnoid function - abducts vocal folds and pulls back arytenoid inn - recurrent laryngeal branch of the X Vagus nerve lateral cricoarytenoid o - upper and lateral borders of cricoid arch c - up and back ins - muscular process of the arytenoid f - adducts the vocal folds and pulls forward on the arytenoid inn - recurrent laryngeal brach of X Vagus interarytenoids (arytenoids) transverse arytenoid o - lateral - posterior surface of one arytenoid ins - lateral - posterior surface of the other arytenoid f - adducts the vocal folds and pulls the arytenoids together interarytenoids oblique arytenoid o - posterior base of muscular process of one arytenoid c - obliquely up ins - apex of other arytenoid f - adducts the vocal folds and pulls the arytenoids together inn - recureent pharyngeal branch of X Vagus cricothyroid two section : pars recta (vertical) and pars oblique (dorsal) o - pars recta - anterior surface of the cricoid beneath arch pars oblique - lateral to pars recta c - pr - up and out po - obliquely up ins - pr - lower lamina of the thyroid po - between laminae and inferior horns of thyroid f - pulls thyroid forward and down lengthens the vocal folds increases vocal tensoin changes pitch inn - superior laryngeal branch of the X Vagus

Author shanamd2011 ID 144457 Card Set 335 11.1 Intrinsic Muscles of the Larynx Description intrinsic muscles of the larynx Updated 2012-04-02T22:38:21Z Show Answers