The anatomy of the larynx Flashcards
What are the 3 unpaired cartiladges?
Epiglottis, thyroid, cricoid
What are the 3 paired cartilidges?
Artytenoids, corniculates, cuneiform
What attatched the hyoid bone to the base of the tounge?
The glossoepiglottic
What ligament attatches the epiglottis to the thyroid cartilidge?
Thyroepiglottic
What joints allow moovmnet of the arytenoids?
Cricoaryteniod joints
What nerve controlls the intrinsic laryngeal muscles?
the vagus nerveq
What is the role of the intrinsic laryngeal muscles?
4
Regulate the tension in the vocal ligament
Regulate the size and shape of the glottal space
Connect one laryngeal cartilage to another
Create movements of cartilages
What are the 5 paired laryngeal muscles?
Thyroarytenoid (make up body of VF) - adducts
Posterior cricoarytenoid - abducts
Lateral cricoarytenoid - adducts
Cricothyroid – stretches, lengthens, thin VF – imp pitch
Arytenoid muscles (2 sets interarytenoid msucles) – pull arytenoids together
Abducted vs adducted
Which muscle abducts the glottis?
which adducts?
Abduct - open
adduct- closed
The posterior cricoarytenoid muscle
Lateral cricoarytenoid
Where does the motor component of the vagus nerve begin?
medulla (brainstem)
What branches of the vagus nerves?
the pharyngeal brannch
the recurrent laryngeal branch
superior laryngeal branch (internal/external)
What branch of the vagus nerve supplies motor control to all intrinsic laryngeal muscles exept the cricothyroid?
RLN
What branch of vagus nerve supplies the cricothyroid mucle?
SLN
Where does laryngeal sensation come from (what branch)
SLN
What muscle controlls pitch?
The crycothyroid muscle
