Exam 2: Larynx Flashcards
Larynx connects
Lower part of pharynx to trachea
Functions of larynx
- Prevents passage of food into airway
- Regulates flow of air into lungs
- Vocalization
Larynx lies at which vertebral level
C3-C6
6 cartilages of larynx
- Thyroid
- Cricoid
- Epiglottic
- Arytenoid
- Corniculate
- Cuneiform
Which part of thyroid cartilage is the “Adam’s Apple”
Laryngeal prominence
Most inferior of laryngeal cartilages
Cricoid
Spoon-shaped cartilage lies behind root of tongue and body of hyoid
Epiglottic
Lower end of epiglottic cart. attached to back of laryngeal prominence by
Thyroepiglottic ligament
Paired cartilages, pyramidal, articulate with cricoid cartilage
Arytenoid cartilage
2 processes on arytenoid cartilages
Vocal process (vocal lig) Muscular process (intrinsic muscles of larynx)
Paired cartilages, lie on apices of arytenoid cartilages
Corniculate cartilages
Paired cartilages, lie in aryepiglottic folds
Cuneiform cartilages
Cricothyroid joint is between
Side of cricoid cartilage and inferior horn of thyroid cartilage
Cricothyroid joint permits what movement
Rotation of thyroid cartilage around horizontal axis
Cricoarytenoid joint is between
Upper border of cricoid cartilage and base of arytenoid cartilage
Cricoarytenoid joint permits what movement
Gliding and rotation of arytenoid cartilage on cricoid cartilage
Thyrohyoid membrane is between
Thyroid cartilage and hyoid bone
Thyrohyoid membrane is pierced by
Internal laryngeal nerve and superior laryngeal vessels
Median cricothyroid ligament is between
Arch of cricoid cartilage to thyroid cartilage
Vocal ligament is between
Thyroid cartilage to vocal process of arytenoid cartilage
Conus elasticus location
Extends up from cricoid cartilage to vocal ligament
Quadrangular membrane connects
Epiglottic cartilage to aryntenoid cartilage
Superior margin of quadrangular membrane
Forms aryepiglottic ligament
Inferior margin of quadrangular membrane
Forms vestibular ligament
2 pairs of folds
- Vestibular folds (false vocal)
2. Vocal folds (true vocal)
Vocal folds contain ____ ligament and ____ muscle.
Vocal ligament
Vocalis muscle
______ forms bulk of vocal fold
Vocalis muscle
Rima vestibuli
Space between vestibular folds
Rima glottidis
Space between vocal folds
3 cavities of larynx
- Laryngeal vestibule
- Laryngeal ventricles
- Infraglottic cavity
Laryngeal saccule
Small diverticulum within laryngeal ventricle
Laryngeal saccule contains
Glands which lubricate vocal folds
Hoarseness due to excessive speaking/singing caused by
Lubricant from saccule temporarily depletes
Extrinsic muscles of larynx function
Move larynx as a whole
Elevator extrinsic muscles of larynx
- Thyrohyoid
- Stylohyoid
- Mylohyoid
- Digastric
- Stylopharyngeus
- Palatopharyngeus
Depressor extrinsic muscles of larynx
- Omohyoid
- Sternohyoid
- Sternothyroid
Recurrent laryngeal nerve motor to
Intrinsic muscles of larynx except cricothyroid
Recurrent laryngeal nerve sensory to
Mucosa of larynx below vocal fold
Internal laryngeal nerve sensory to
Mucosa of larynx above vocal folds
External laryngeal nerve motor to
Cricothyroid and inferior constrictor muscles
Blood supply of larynx
Superior laryngeal artery
Inferior laryngeal artery
Oblique line of thyroid cartilage is attachment site for which muscles
Inferior constrictor
Sternothyroid
Thyrohyoid
Cricoid cartilage consists of
Narrow, anterior arch
Broad, posterior lamina
Vocal process of arytenoid cartilage
Attachment to vocal ligament
Muscular process of arytenoid cartilage
Attachment to intrinsic muscles of larynx
Size and shape of rima glottidis is altered during
Phonation and respiration
Rima glottidis is ______ during inspiration
Wide
Rima glottidis is ______________ during expiration and phonation
Narrow and wedge shaped
What determines pitch
Tension of vocal folds
To raise pitch what happens to tension
Increased
To Lower the pitch what happens to tension
Decreased