Laryngeal Anatomy not muscles

Laryngeal Anatomy not muscles - Laryngeal Anatomy Laryngeal...

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Laryngeal Anatomy Laryngeal Anatomy Larynx • principle structure for voice production – vocal folds are vibrating elements – convert air stream into sound • unpaired, midline, musculocartilaginous structure • located between trachea and hyoid bone at level of C3-6
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Functions of the larynx Protection of airway during swallowing Increasing thoracic pressure Valving for speech
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Vocal fold adduction necessary for sounds that require voice (e.g., vowels, voice consonants) Vocal fold abduction necessary for voiceless speech sounds Conduit for air entering and leaving the lungs abd = open add=closed Framework of the Larynx
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Thyroid Cartilage
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Largest in larynx Forms most of front and sides of laryngeal skeleton (protection) 2 fused quadrilateral plates = laminae Angle Thyroid notch 2 sets of horns (cornua) – Inferior cornua articulate with cricoid cartilage = cricothyroid joint
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– Superior cornua are coupled to hyoid bone Cricoid Cartilage • Lowest part of laryngeal skeleton • Thick, posterior lamina • Thin anterior arch • 4 facets
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– Lower facets articulate with inferior corunua of thyroid – Upper facets articulate with arytenoids Arytenoid Cartilages • Apex – Corniculate cartilage site on top of apex • Base
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– Pointed, anteriorly-directed projection = vocal process – Rounded, posterolateral projection = muscular process • Underside of muscular process articulates with cricoid Epiglottis Single cartilage positioned behind hyoid bone and root of tongue Upper part = Body – Anterior surface = lingual surface • Attaches to hyoid
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This note was uploaded on 11/13/2010 for the course CODS 361 taught by Professor Gel during the Spring '10 term at WPUNJ.

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Laryngeal Anatomy not muscles - Laryngeal Anatomy Laryngeal...

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