Larynx Flashcards
Describe the larynx?
Voice production, hyaline cartilage, small plane synovial joints
Why is the cuneiform within aryepiglottic folds?
To support them
What attaches the aryepiglottic fold?
Corniculate
What kind of cartilage is epiglottis?
Elastic cartilage
What are the anterior connections of the epiglottis?
To body of hyoid bone and posterior surface of thyroid cartilage
What are the lateral connections of the epiglottis?
To arytenoid cartilages via aryepiglottic folds
What is the mucous membrane covering reflected onto posterior surface of tongue?
Median glossoepiglottic fold and lateral phyryngoepiglottoc folds
What attaches arytenoid cartilages to epiglottis?
Quadrangular ligament - free edge is vestibular ligament
What is the function of the vocal fold movements
Change air flow through larynx = sound production (phonation).
What creates individual sounds and words by movements?
Lips, cheeks and tongue
What are the external muscles of the larynx?
Supra and infra-hyoid muscles
What are the elevation muscles of the larynx?
Digastric, stylohyoid, mylohyoid, geniohyoid
What are the depression muscles of the larynx?
Sternothyroid, sternohyoid, omohyoid
What are the internal muscles of the larynx?
Muscles which pass between elements of the larynx and move the cartilages or vocal folds
Attachments of the cricoid cartilage?
To lamina and inferior cornu of thyroid cartilage
What increases distance between thyroid cartilage and vocal processes of arytenoid?
Tense and elongate vocal folds
What innervates the cricothyroid?
External laryngeal branch of vagus (CN X)
Attachments of the thyroarytenoid?
Inner surface of angle of thyroid cartilage to anterolateral surface of arytenoid cartilages
Where do the upper fibres of the thyroarytenoid run alongside?
Coval ligament - vocalis
What happens when arytenoids are pulled forwards towards thyroid cartilage?
Shorten and relax vocal ligament
What innervates the thyroarytenoid?
Recurrent laryngeal nerve
Attachments of the posterior circoarytenoid?
Posterior of lamina of circoid cartilage to muscular process of arytenoid cartilage
What does the posterior cricoarytenoid do?
Pulls muscular process of arytenoid backwards
What innervates the posterior cricoarytenoid?
Recurrent laryngeal branch of vagus
