11/12 Anatomy of the Nasal Cavity Flashcards
The major structures of the superior middle and inferior _________ Nasal Cavity and Nasopharynx
The bones that come out from the sides of the nasal cavity to form the concha.
Turbinate Bones
The spaces below each concha
The superior middle and inferior meatus
What purpose does the Superior, middle, and inferior meatus each serve?
They serve to condition the air by humidify, warm, and swirl around.
What is the nerve that does general sensation to the Nasal cavity?
Maxillary branch of the trigeminal nerve (V-2)
Gives pain Temp touch etc.
Describe the course of the Maxillary branch of the trigeminal nerve in the nasal cavity
V-2 sends branches to the nasal septem, lateral nasal wall and the hard palate and the lingual surface of the gums.
Describe the nasal cavity from the nostril back to the nasopharynx (with the concha still in place.
What’s located under the middle concha, in the middle meatus?
From the anterior to the posterior: Infundibulum opeing of frontonasal duct taht drains the frontal sinus and anterior ethmoid cells; the Opening of the middle ethmoidal cells onto bulla ehmoidalis; and the opening of maxillary sinus in floow of pheno-ehmoidal recess. then in the back is the hiatus semilunar!
in summary: Frontonasal duct (frontal sinus/anter. ethmoid); bulla ethmoidalis (middle ethmoid); Spheno-ethmoidal recess ( maxillary sinus); hiatus semilunar!
What if I cut away the superior concha bone and explored the surperior meatus…
Find the opeing to posterior ethmoidal clls into the lateral wall of superior meatus.
What if I explored just above the superior concha of the nasal cavity, what opening could I find?
the Opening of shenoidal sinus into sheno-ethmoidal recess
What if a horrible nasal bacteria decided to grow in the inferior nasal meatus, what duct could it infect?
the nasolacrimal duct!
what If i lost the greater petrosal branch due to a horrible case of shingles…or somethin…
wouldn’t be able to cry!!!! because the lacrimal gland is innervated by the greater petrosal. Also wouldn’t be able to close your eye against resistance etc.
An infection of the lacrimal gland may also infect what nearby structure?
the nasal cavity….because the tears drain into the lacrimal canaliculi, then the lacrimal sac, and into the nasolacrimal duct in the inferior nasal meatus
The road of a tear….into the nose
Inf. Sup. Puncta; Lacrimal canaliculi, lacrimal sac; nasolacrimal duct; inferior meatus, upper lip, mouth etc! heheh
what is a paranasal sinus?
Hollow chambers named for the bones in which they reside.
The sinuses of the face…
Frontal sinus;
Ethmoid sinus (air cells)
Maxillary sinus
sphenoid sinus
There seems to be an infection just above my eye…which sinus could it be?
The Frontal Sinus…paired set just above the eyebrows
an infection has traveled from teh middle meatus into some honey comb looking sinuses…where is the infection?
The ethmoid sinus or air cells, either the ant. middle. or post.
Now that pesty sinus infection has traveled directly below the eyes…which sinus set is it in?
the Maxillaary sinus…paired set of two just below the eyes.
The sinus infection has traveled up above the sup. concha of the nasal cavity and invaded a sinus post. the nasal cavity…where is it?
In the sphenoid sinus!
That nasal infection is causing a lot of pain and I’m ready to knock out the nerves that innervate it…what nerves to I target
The trigeminal nerve that is providing GS to the sinuses and specifically V-1 and V-2
My attending just hit me with a zinger….name this tube opening behind the nasal cavity at the top of the nasopharynx….with three different names!
The opening of:
the pharyngotympanic tube
Auditory tube
Eustacian tube
bamm!
I had a killer sore throat and now my ears and the spot behind my ears is very tender…where has the infection traveled?
Up the pharyngotympanic tube, into the middle ear, into the mastoid antrium and into the mastoid cells.
The three important structures of the oral cavity…as per Dr. M
Palate
Tongue
Teeth
