larynx basic info Flashcards
what are the functions of the larynx?
1 prevent passage of food into airway during swallowing
2 regulates flow of air into lungs
3 functions in vocalization
the low larynx is directly associated with what?
speech
what is the length of the larynx?
5cm and lies between C3 and C6
what are the 5 cartilages of the larynx?
Thyroid Cricoid Arytenoid Corniculate Cuneiform
what does structures does the thyroid cartilage present?
Superior thyroid notch Inferior thyroid notch Laryngeal prominence Superior horn Inferior horn- articulates wit cricoid Laminae Oblique line
the oblique line of the thyroid cartilage provides attachment for what?
Inferior constrictor
Sternothyroid
Thyrohyoid muscles
where does the cricoid cartilage end?
C6, where trachea begins
what is the shape of the cricoid cartilage?
signet ring
which is the most inferior of the laryngeal cartilages?
cricoid cartilage
what is the shape of the epiglottic cartilage and where does it lie?
spoon shaped and it lies behind the root of the tongue and body of hyoid bone
what is the shape of the cricoid cartilage?
it consists of a narrow anterior arch and a broad, posterior lamina
the lower end of the epiglottic cartilage is attached to the back of the laryngeal prominence of the thyroid cartilage by what?
thyroepiglottic ligament
arytenoid cartilages are what type of cartilages and what is their shape?
it is a paired cartilage with a pyramidal shape
what are the 2 processes of the arytenoid cartilage?
vocal process- vocal ligament
muscular process- intrinsic muscles
what are the 2 joints of the larynx?
cricothyroid joint
cricoarytenoid joint
both synovial mobile
what type of joint is the cricothyroid joint?
hinge/ginglymis
what is the function of the cricoarytenoid joint?
moves vocal cords by moving arytenoid cartilage
what are the ligaments of the larynx?
Thyrohyoid membrane Median cricothyroid ligament Vocal ligament Conus elasticus Quadrangular membrane
which is the ligament that vibrates to produce sound?
vocal ligament
what does the quadrangular membrane connect?
connects the epiglottic cartilage to the arytenoid cartilage on each side
what are the margins of the quadrangular membrane?
superior- aryepiglottic ligament w/in fold
inferior- vestibular ligament w/in fold
what are the 2 folds of the larynx and their alternate names?
Vestibular folds- false vocal cords
Vocal folds- true vocal cords
which fold is protective in function and initiates cough reflex?
vestibular fold- false vocal cord
what is the space between the vestibular folds called?
rima vestibuli
what is the space between the vocal folds called? it is the narrowest part of the laryngeal cavity?
rima glottidis
what structures do the vocal folds contain?
vocal ligament
vocalis muscle
what is the name of the rima glottidis and vocal folds combined?
glottis
what are the 3 cavities of the larynx?
Laryngeal vestibule
Laryngeal ventricles
Infraglottic cavity
which cavity extends from the laryngeal inlet to the vestibular folds?
laryngeal vestibule
which cavity lies between the vestibular folds and vocal folds?
laryngeal ventricles
which cavity extends from the vocal folds to the inferior border of the cricoid cartilage?
infraglottic cavity
what is the name for a small diverticulum within the laryngeal ventricle that contains glands which lubricate the vocal folds?
laryngeal saccule
what is another name for the “oil can” of the vocal folds?
laryngeal saccule
