Pterygopalatine Fossa-Sievert Flashcards
What is the opening to the pharynx called?
the aditus
Where is the vestibule found?
from the aditus to the vestibular folds (false vocal cords)
Where is the ventricle found?
b/w the false & true vocal cords
What is the fcn of the false vocal cords?
protective in nature as they overly the true vocal cords
Where is the infraglottic cavity?
this is found below the true vocal folds; extends down to the inferior cricoid cartilage
What do you find below the infraglottic cavity?
tracheal rings
Ventricles are an important space for what?
phonation
Describe what happens to the aditus when you swallow.
the larynx is pulled up
the tongue is pushed back
the epiglottis is pushed down closer to the cricoid cartilage
aditus closes (tho not completely)
What type of covering does the larynx have?
a mucosal lining
The cartilage that makes up the larynx is held together by what ?
ligaments
What is the space called b/w the epiglottis & the tongue (back)?
vallecula
Describe the structure of the thyroid cartilage.
It is a 2/3 protective covering that is incomplete in the posterior aspect.
What are the arytenoids?
these are processes that are found posteriorly sitting on top of the cricoid cartilage
What are the 2 processes that are found on the arytenoids?
the vocal process & muscular process
What is the function of the vocal process of the arytenoid?
there is a ligament on this vocal process that extends anteriorly to the thyroid & makes up a part of the true vocal cords
What is the function of the muscular process of the arytenoid?
it has muscles attached to it that are capable of opening or closing the vocal cords
Describe the structure & location of the cricoid cartilage.
this is located inferior to the thyroid cartilage. It is a complete cartilagenous ring. It is taller in the back than it is in the front. Mullet.
Describe the structure of the membrane that connects the thyroid cartilage & cricoid cartilage.
cricothyroid membrane. it has a mucosal lining & elastic core
T/F The cricoid & thyroid are capable of moving w/ respect to one another.
TRUE! They are rocking forwards or backwards w/ respect to one another
How do the cricoid & thyroid cartilages rock backwards on each other?
via the cricothyroid joint–synovial.
they rock on a transverse axis.
What is the membrane called that runs between the hyoid bone & the thyroid cartilage? there is an important hole in this-what is it called?
thyrohyoid membrane
**hole: for passage of the internal branch of the superior laryngeal nerve (branch of CN10).
What happens to the vocal ligament that is attached to the arytenoid when you rock the thyroid cartilage back & forth?
Rock the thyroid cartilage forward–ligament becomes tight.
Rock the thyroid cartilage back–ligament becomes loose.
What is the difference b/w male & female vocal ligaments?
Women have shorter vocal ligaments than men. Thus, they have higher voices.
What are 2 important synovial joints that you find in the larynx?
- b/w the cricoid & thyroid cartilages.
2. b/w the arytenoid & the cricoid.
What type of joint is the arytenoid/cricoid joint? Which movements are possible?
multiaxial joint.
synovial joint
capable of rotation & gliding.
T/F The elastic core of the cricothyroid membrane is a part of the vocal cord.
True.
Describe the quadrangular membrane.
it has a mucosal lining
it is sorta found on the back of the epiglottis…it also extends towards the arytenoids
What special thing does the inferior aspect of the quadrangular membrane contribute to?
the false vocal cord
What is the fcn of the quadrangular membrane?
this membrane keeps food from getting into the piriform recess & aditus
the muscle that lines this has a pursestring effect, closing the aditus.
The conus elasticus contributes to something important-what is it? Also…what is it a part of?
contributes to the true vocal cord & vocal ligament
a part of the cricothyroid cartilage
What is found b/w the true & false vocal cords?
a ventricle
also called rima glottidis
We have talked about the epiglottis…but what is the glottis?
glottis=rima glottidis + true vocal cord
Which part of the thyroid cartilage articulates with the cricoid cartilage…this makes up the synovial joint?
the inferior cornu of the thyroid cartilage articulates w/ the cricoid cartilage.
The rocking movement that happens at the cricothyroid joint happens on which axis?
transverse axis
What is the innervation of the cricothyroid muscle? Why does this make this muscle unique?
branch of vagus, external branch of the superior laryngeal nerve.
only laryngeal muscle not innervated by the recurrent laryngeal nerve
What is the action of the cricothyroid muscle?
it moves the arytenoids posteriorly & tightens the vocal ligaments (adds tension)
adducts the vocal ligaments slightly
What is the significance of the adduction of the vocal ligaments upon contraction of the cricothyroid muscle?
if you lost the recurrent laryngeal nerve…
then you have this cricothyroid muscle causing all this tension…get adduction of the vocal ligaments
can close off your airway.
Describe the cricoarytenoid joint.
it is a synovial joint with a delicate capsular ligament.
**movement at this joint results in adbuction or adduction of the vocal ligaments
What are the movements that are possible at the cricoarytenoid joint?
rotation–vertical axis
gliding movements of abduction/adduction-horizontal plane
What is the major abductor of the vocal folds? On which axis does this rotation occur?
vertical axis
via lateral & posterior cricoarytenoid muscles.
**these attach to the muscular process of the arytenoid to the posterior cricoid
What are the major adductors of the vocal folds?
lateral arytenoid
transverse arytenoid
What is a major tensor of the vocal folds?
cricothyroid muscle
What causes relaxation of the vocal folds?
thyroarytenoids
**from arytenoid to thyroid cartilage…pulling ary closer to the cartilage causes relaxation.
this muscle is a part of the true vocal fold
Which syndrome causes a lesion in the mammillary bodies? What are the major symptoms of this?
Wernicke-Korsakoff Syndrome
confusion, opthalmoplegia, ataxia
memory loss!!
The transverse arytenoid & oblique arytenoid have similar positions in what way? They are responsible for what type of movements?
both are attached b/w the arytenoids
responsible for gliding movements
What are the muscles of the laryngeal inlet? What is their effect?
oblique arytenoids
thyroepiglottic
**they both act as a purse string to close the aditus
Describe the structure & location of the oblique arytenoids.
they have a thin muscle mass in the ary-epiglottic fold
kind of swings to the other side
this fold is defined by the quadrangular membrane
ophthalmoplegia is what?
weakness of one of the extra ocular muscles