Pterygopalatine fossa and nasal cavity Flashcards
which bone is the crista glalli found in?
ethmoid bone
which bone is the cribiform plate found?
ethmoid bone
which part of the nasal cavity is considered the respiratory area?
the inferior 2/3s
which part of the nasal cavity is considered the olfactory area?
superior 1/3
when looking up into the nasopharynx from the oropharynx, which concha can you see?
the middle and the inferior concha
what makes up the lateral wall of the nasal cavity?
the superior, middle, and inferior nasal conchae
what runs through the sphenopalatine foramen?
the sphenopalatine artery and the nasopalatine nerve
where are the sphenopalatine artery and nasopalatine nerve coming from?
the pterygopalatine fossa
the spheno-ethmoidal recess receives drainage from what?
sphenoid sinus
the superior nasal meatus receives drainage from what?
ethmoidal sinus
the middle nasal meatus receives drainage from what?
frontal sinus, maxillary sinus, anterior/middle ethmoidal sinus
the inferior nasal meatus receives drainage from what?
nasolacrimal duct
how many openings are there for the ethmoidal sinus in the superior nasal meatus?
2
where does the maxillary sinus open into the middle nasal meatus?
in the posterior part of the semilunar hiatus at the maxillary ostium (below the ethmoidal bulla)
where is the ethmoidal bulla located?
in the middle nasal meatus
what are the three main arteries supplying the nasal cavity?
opthalmic artery, the maxillary artery, and the facial artery
what branches of the opthalmic artery are supplying the nasal cavity?
the anterior and posterior ethmoid arteries
what branches of the maxillary artery are supplying the nasal cavity?
the sphenopalatine artery and the greater palatine artery
what branches of the facial artery are supplying the nasal cavity?
superior labial artery and the lateral nasal branches
what is kiesselbach area?
it is the area where all of the arteries of the nasal cavity come together in a capillary bed- can bleed profusely
How does the maxillary sinus drain?
via the maxillary ostium into the middle meatus
what is the innervation of the maxillary sinus?
the superior alveolar nerve branches
where do the posterior ethmoidal cells drain into?
the superior meatus
what is the innervation of the ethmoid sinus?
nasociliary nerve (CN V1)
what is the innervation of the sphenoid sinus?
posterior ethmoidal nerve from nasociliary
where does the frontal sinus drain into?
the semilunar hiatus of the middle meatus
what is the innervation of the frontal sinus?
supraorbital nerves (CN V1)
the superior (larger) end of the pterygopalatine fossa opens into what?
the inferior orbital fissure
the inferior end of the pterygopalatine fossa narrows and continues as what?
the greater and lesser palatine canals
what are the contents of the pterygopalatine fossa?
maxillary nerve (CN V2), pterygopalatine ganglion, third part of the maxillary artery
what does the maxillary nerve run through to get into the pterygopalatine fossa?
the foramen rotundum
within the pterygopalatine fossa, what does the maxillary nerve give off?
the zygomatic nerve
what does the zygomatic nerve divide into?
zygomaticofacial and zygomaticotemporal nerves
what does the zygomaticotemporal nerve also give rise to?
a communicating branch, which conveys postsympathetic parasympathetics to the lacrimal gland
while in the pterygopalatine fossa, the maxillary nerve gives off what else besides the zygomatic nerve?
two ganglionic branches to the pterygopalatine ganglion
What branches off the maxillary artery can you see in the pterygopalatine fossa?
descending palatine a, posterior superior alveolar a, infraorbital artery, artery of the pterygoid canal, sphenopalatine a
