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Questions and Answers
Which muscle type controls movements of the vocal folds?
Which of the following muscles cannot be damaged if a patient is unable to move or depress their larynx?
What is the function of the elevators of the larynx?
What type of muscles are responsible for controlling the laryngeal inlet?
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Which muscle type is responsible for moving the larynx?
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What is the function of the depressors of the larynx?
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Which of the following structures is not a part of the quadrangular membrane?
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What constitutes the vestibular ligament?
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What is the function of the conus elasticus?
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Which of the following structures is not a part of the superior surface of the epiglottis?
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What is the function of the median glossoepiglottic fold?
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What is the function of the aryepiglottic fold?
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Which muscle is an abductor of the larynx?
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Which muscle increases the length of the vocal folds?
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Which muscle is a depressor of the larynx?
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Which muscle closes the glottis?
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Which muscle is responsible for shortening the vocal folds?
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Which muscle is an elevator of the larynx?
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Which muscle adducts the vocal folds?
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Which muscle is responsible for opening the glottis?
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Study Notes
Larynx Anatomy
- Posterior wall of pharynx leads to esophagus
- Epiglottis is located above the larynx
- Pyriform sinus is located lateral to the epiglottis
- Vallecula is a small depression located above the epiglottis
Laryngeal Surface of Epiglottis
- Laryngeal surface of epiglottis faces the larynx
- Ventricle is located below the laryngeal surface of epiglottis
Vocal Cords
- True vocal cords are located in the larynx
- False vocal cords are located above the true vocal cords
- True vocal cords are also known as vocal folds
Hypopharynx
- Posterior wall of hypopharynx leads to esophagus
- Corniculate tubercle is located on the arytenoid cartilage
- Cuneiform tubercle is located on the arytenoid cartilage
Cartilaginous Rings of Trachea
- True vocal cords are located in the trachea
- Cricoid ring is a cartilaginous ring in the trachea
Larynx Muscles
- Extrinsic muscles include:
- Elevators of larynx (e.g. digastric, stylohyoid, mylohyoid, geniohyoid, stylopharyngeus, palatopharyngeus)
- Depressors of larynx (e.g. sternohyoid, sternothyroid, omohyoid)
- Intrinsic muscles include:
- Muscles controlling laryngeal inlet (e.g. oblique arytenoid, thyroepiglottic muscle, aryepiglottic muscle)
- Muscles controlling movements of vocal folds (e.g. cricothyroid, posterior cricoarytenoid, thyroarytenoid, vocalis)
Quadrangular Membrane
- Fibroelastic membrane that extends between the epiglottis, thyroid angle, and arytenoid cartilage
- Its free inferior margin constitutes the vestibular ligament stretching between the thyroid angle and vocal process of arytenoids above the attachment of vocal ligaments
- The upper free border is in the aryepiglottic fold
Conus Elasticus
- Extends between the arch of the cricoid and the vocal process of the arytenoid and the junction of the two thyroid laminae
- The free thickened upper border is the vocal ligament
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Description
This quiz covers the anatomy of the larynx, including the pyriform sinus, posterior wall of the pharynx, and epiglottis. Test your knowledge of the structures involved.
