7: Nasal Cavity And Pterygopalatine Fossa Flashcards
Three bones that help form the bony part of the nose
Nasal bones, frontal part of maxilla, nasal part of frontal bone
Five cartilages in the nose
2 lateral cartilages
2 alar cartilages
1 Septal cartilage
Mucosal lining of nasal cavity
Whole thing is lined with mucosa, besides vestibule of the nose
Respiratory vs olfactory area of the nasal mucosa
Respiratory area: inferior 2/3
Olfactory area: superior 1/3
What is special about olfactory area of the nasal mucosa
Is specialized and contains peripheral CN 1 nerve endings
Three bones that form the roof of the nasal cavity
Frontal bone, ethmoid bone, sphenoid bone
Two bones that form the floor of the nasal cavity
Palatine process of maxilla, horizontal plate of palatine bone
What five things form the nasal septum (Medial wall of the nasal cavity)
- Perpendicular plate of ethmoid
- Vomer
- Septal cartilage
- Nasal crests of maxillary bone
- Nasal crest of palatine bones
Three things in the lateral wall of the nasal cavity
Superior, middle, and inferior nasal conchae
Four passages divided by nasal conchae
- Spheno-ethmoid recess
- Superior nasal meatus
- Middle nasal meatus
- Inferior nasal meatus
Spheno-ethmoid recess: opening of…?
Sphenoid sinus
Superior nasal meatus: opening of…?
Ethmoidal sinuses
Middle nasal meatus: opening of…?
Frontal sinus + maxillary sinus
Areas where maxillary sinus and frontal sinus open into the middle nasal meatus
Maxillary ostium: for maxillary sinus
Semilunar hiatus: for frontal sinus
Inferior nasal meatus: opening for…?
Nasolacrimal duct
Four paranasal sinuses
- Maxillary sinus
- Ethmoid sinus
- Sphenoid sinus
- Frontal sinus
What is the largest paranasal sinus?
Maxillary sinus
Where is the ethmoid sinus?
Ethmoid air cells, between orbits
What divides the sphenoid sinuses?
Bony part of nasal septum
Where is the frontal sinus
Between inner and outer tables of the frontal bone
Three general A’s that supply the nasal cavity
Ophthalmic A, maxillary A, facial A
Three veins that drain the nasal cavity
Ophthalmic V, sphenopalatine V, facial V
Five specific A’s that supply the nasal cavity
- Anterior ethmoid A
- Posterior ethmoid A
- Sphenopalatine A
- Greater palatine A
- Superior labial A
Kiesselbach area
Where all five A’s that supply the nasal cavity come together in a capillary bed, can bleed profusely
Where is the pterygopalatine fossa found?
Inferior to apex of orbit
Three major contents of the pterygopalatine fossa
- Maxillary N (from CN V2)
- Pterygopalatine ganglion
- 3rd part of maxillary A
What do the great petrosal and deep petrosal N form when they join together?
N of the pterygoid canal
Where do fibers from the great petrosal N synapse?
Pterygopalatine ganglion
Where are all parasymp fibers to the pterygopalatine ganglion from?
Greater petrosal N (from CN 7)
Where are sympathetic fibers to the pterygopalatine ganglion from?
Deep petrosal N
