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
the muscle that courses form the palate to the tounge
the palatoglossal muscle
the structure that is off-center away from the leasion if there is a problem with cranial nerve 10
The palatoglossal arch in the back of the oral cavity (and the ovula that is attached to it)
the muscle from the palate to the pharnx…behind the palatoglossal m.
The palatopharyngeal muscle that makes the palatopharyngeal arch.
located between the two arches at the back of the oral cavity
Palatine tonsil is located between the palatoglossal and palatopharyngeal arch
I just got a hunk of musaca caught in my (back of the oral cavity) what nerve is telling me about it?
the greater and lesser palatine nerves (CN V-2) provide innervation to the hard and soft palate, lingual surface of gums!
CN V-2 comes out of the trigeminal ganglion and chugga-choos where?
What kind of train is it?
Through the Foramen rotundum, and then branches
a branch goes strait anterior to pop out as the infraorbital nerve to innervate the skin below the eye and side of nose, and top of teeth root.
A part dives down to form the greater and lesser palatine nerves to innervate the hard and soft palate
It is a general sensory train headed form the teeth and skin back to the trigeminal nerve
The muscle that lifts the palate:
the Levator veli palatinin muscle!
The motor innervation to the muscle that lifts the palate
the levator veli palatini muscle is innervated by CN X
The muscle and cranial nerve that tenses the palate
Cranial nerve 3 and the Tensor veli palatini muscle (CN X)
The sensory to the anterior 2/3 of the tounge
SS - CN VII via the lingual then via the corda tympani back to the
GS CN V-3
The sensation to the post. 1/3 of tounge
GS- CN IX
SS - CN IX
The muscle that moves the tounge
the Genioglossus muscle
The nerve track of the muscle of the toung
CN XII From the medulla, out he hypoglossal canal, through the submandibular triangle and innervates all of the tounge muscles
Types of teeth
Molars: yellow; Premolars: orange; Canines: blue; Incisors: green.
Teeth for grinding
Molars
The sensory innervation of the teeth
Maxillary teeth by V-2:
Anterior superior aviolar nerve
Middle superior aviolar nerve
and posterior aviolar nerve.
for the front middle and rear teeth.
The sensory innervation to the bottom teeth
the Mandibular teeth innervated by CN V-3
Inferior Alveolar nerve that courses down thorugh the mandible and exits as the mental nerve!
