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ANAT 2626 Chapter 8 - Larynx

ANAT 2626 Chapter 8 - Larynx - 1 Chapter 8 Pages 1022 to...

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1 Chapter 8 - Pages 1022 to 1032 and 1044 to 1017 Larynx 1. complex organ of voice production ( voice box ) composed of nine cartilages 2. connected by membranes and ligaments and containing the vocal folds 3. it is located in the anterior neck at the level of the bodies of C3 - C6 vertebrae 4. it connects the inferior part of the pharynx ( oropharynx ) with the trachea Skeleton of larynx 1. consists of nine cartilages 2. three are single ( thyroid, cricoid and epiglottis ) 3. three are paired ( arytenoids, corniculate and cuneiform ) Thyroid cartilage 1. the largest, its superior border lies opposite the C4 vertebra 2. two plate - like laminae fuse anteriorly in the median plane to form the laryngeal prominence 3. this projection is ( Adam’s apple ) is well marked in men 4. superior to this prminence , the laminae diverge to form a V shaped superior thyroid notch 5. inferior thyroid notch is less distinct 6. each lamina projects as superior and inferior horns 7. the superior border and superior horns attach to the hyoid bone by the thyrohyoid membrane , pierced by the internal laryngeal nerve and superior laryngeal artery 8. the median part of the membrane is the median thyrohyoid ligament and its lateral parts are the lateral thyrohyoid ligaments Cricothyroid joint is between the inferior horns of thyroid cartilage and lateral surfaces of cricoid cartilage Cricoid cartilage 1. is shaped like a signet ring 2. its the anterior part is the arch and the posterior part is the lamina Median cricothyroid ligament connects inferior margins of thyroid cartilage and cricoid cartilage Cricotracheal ligament connects the cricoid cartilage with the Frst tracheal ring Arytenoid cartilages 1. are paired, three - sided pyramidal cartilages that articulate with the lamina of cricoid cartilage 2. apex attaches to the ary - epiglottic fold 3. vocal process provides the posterior attachment of vocal ligament Cricoarytenoid joint is between the bases of the arytenoid cartilages and the lamina of the cricoid cartilage
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2 Vocal ligaments extend from the junction of the laminae of thyroid cartilage anteriorly to the vocal process of the arytenoid cartilage posteriorly Conus elasticus or cricovocal membrane is the superior thickened part of the vocal membrane Lateral cricothryoid ligament is the part of the membrane extending laterally between the vocal folds and the superior border of the cricoid cartilage Rima glottidis is the opening between the vocal folds Epiglottis 1. consists of elastic cartilage, situated posterior to the root of the tongue and the hyoid 2. heart - shaped cartilage , covered with mucous membrane 3. it lies anterior to the inlet of larynx 4. the tapered inferior end is called the stalk of the epiglottis Thyro - epiglottic ligament connects the thyroid lamina and the epiglottis Hyo - epiglottic ligament connects the anterior surface of the epiglottis and the hyoid Quadrangular membrane is a thin, submucosal sheet of connective tissue that extends between the
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ANAT 2626 Chapter 8 - Larynx - 1 Chapter 8 Pages 1022 to...

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