Advanced Glottis Quiz

Q1. Why can bilateral paralysis of the posterior cricoarytenoid muscles cause severe airway compromise?

• They are the only muscles capable of tensing the vocal folds
• They close the laryngeal inlet during swallowing
• They are the only muscles capable of abducting the vocal folds
• They provide all sensory innervation below the glottis

Q2. Which glottic finding is expected with a unilateral recurrent laryngeal nerve lesion?

• Isolated loss of cricothyroid function with normal other muscles
• Reduced or absent movement of the ipsilateral vocal fold with hoarseness
• Bilateral loss of vocal fold movement in every case
• Loss of sensation above the vocal folds only

Q3. Why does an external superior laryngeal nerve lesion particularly affect production of high-pitched sounds?

• It denervates cricothyroid and reduces the ability to tense the vocal folds
• It denervates all arytenoid muscles
• It removes sensory innervation below the glottis
• It paralyzes posterior cricoarytenoid and prevents abduction

Q4. Which muscle combination most directly closes both membranous and cartilaginous portions of the rima glottidis during forceful glottic closure?

• Posterior cricoarytenoids with cricothyroids
• Cricothyroids with posterior cricoarytenoids
• Lateral cricoarytenoids with transverse and oblique arytenoids
• Thyrohyoids with sternothyroids

Q5. Why is the posterior part of the glottis especially important for airway caliber?

• The posterior glottis is rigid and cannot change shape
• The posterior glottis contains the epiglottis
• Arytenoid position strongly controls the posterior glottic airway
• Only the vestibular folds determine airway caliber

Q6. Which structural component forms the core of the free medial edge of each true vocal fold?

• Vocal ligament
• Vestibular ligament
• Median thyrohyoid ligament
• Aryepiglottic ligament

Q7. Which anatomical distinction separates the glottis from the supraglottis?

• The supraglottis consists only of the trachea
• There is no anatomical distinction between them
• The glottis lies entirely below the cricoid cartilage
• The glottis is formed by the true vocal folds and their opening, while the supraglottis lies above them

Q8. During phonation, what permits the vocal folds to generate sound rather than simply obstruct airflow?

• Complete rigid closure prevents all airflow throughout phonation
• The vestibular folds normally provide the primary vibration
• Maximal abduction creates the sound directly
• Controlled adduction and tension allow expiratory airflow to produce vocal fold vibration

Q9. Which lesion pattern poses the greatest immediate threat to the airway at the level of the glottis?

• Bilateral loss of vocal fold abduction
• Unilateral cricothyroid weakness only
• Isolated loss of supraglottic sensation
• Unilateral loss of vocal fold tension with a widely patent airway

Q10. Which statement best integrates glottic anatomy and function?

• The glottis functions only during swallowing and has no role in respiration or phonation
• The glottis is a dynamic true vocal fold aperture whose muscular control supports respiration, phonation, and airway closure
• The glottis consists of the vestibular folds and epiglottis only
• The glottis is a fixed opening with no muscular control