nasal cavity Flashcards
what are the bones that form the roof of the nasal cavity?
nasal bone
frontal bone
cribiform plate of ethmoid bone
body of sphenoid bone
what is the floor of the nasal cavity formed by?
palatine process of maxilla
horizontal plate of palatine bone
these 2 together form hard palate
the medial wall or nasal septum of the nasal cavity is formed by?
perpendicular plate of ethmoid bone
vomer
septal cartilage
PVS
the lateral wall of the nasal cavity is formed by what 7 bones?
Nasal bone Frontal process of maxilla Lacrimal bone Perpendicular plate of palatine r Inferior nasal concha Medial pterygoid plate of sphenoid Ethmoid bone
NFL PrIME
what are the 2 functions of the nasal concha?
- increase surface area
2. increase air turbulence
the sphenoethmoidal recess receives the opening of what?
the sphenoid sinus
the superior meatus receives the opening of the?
posterior ethmoidal cells
the middle meatus receives which openings?
Maxillary sinus
Middle ethmoidal cells
Anterior ethmoidal cells
Frontal sinus
MMA Fight
what is the name of a rounded projection into the middle meatus?
ethmoidal bulla
a curved slit lying below the ethmoidal bulla within the middle meatus is called?
hiatus semilunaris
the inferior meatus receives the opening of?
the nasolacrimal duct
what does the nasolacrimal duct connect?
the lacrimal sac of the orbit to the nasal cavity- it drains extra tears
what are the 3 regions of the nasal cavity?
nasal vestibule
respiratory region
olfactory region
the nasal vestibule contains what?
hair, sebaceous glands and sweat glands- its the area of the nose you pick
the olfactory region contains fibers of what?
the olfactory nerve CN I which pass through the cribiform plate
what is the special sensory innervation of the nasal cavity?
olfactory nerve CN I
what is the general sensory innervation
branches of maxillary and opthalmic divisions of trigeminal nerve CN V
what is the autonomic innervation (sympathetic and parasympathetic) of the nasal cavity?
pterygopalatine ganglion
the primary blood supply to the nasal cavity is from?
sphenopalatine artery
there is also blood supply to the nasal cavity from 2 other branches?
sphenopalatine branch of maxillary artery
anterior ethmoidal branch of opthalmic artery
lymph nodes from the nasal cavity drain into?
deep cervical nodes
what are the 4 sinuses of the nose?
frontal
maxillary
sphenoidal
ethmoidal
the frontal sinus opens into the?
hiatus semilunaris of the middle meatus via the frontonasal duct
which is the largest of the paranasal sinuses and the only one present at birth?
maxillary sinus
which sinus is most frequently prone to infection due to poor drainage?
maxillary sinus
when someone has pituitary cancer surgery it is done through which sinus?
sphenoid sinus
what are the 3 types of ethmoidal cells in the ethmoidal sinus?
posterior, middle and anterior ethmoidal cells
an infection of the nasal cavity can spread to many places, what are the 6 places they spread?
- nasopharynx- most common- acute pharyngitis
- middle ear- otitis media
- paranasal sinuses- sinusitis
- lacrimal apparatus and conjunctiva- conjunctivitis
- anterior cranial fossa- meningitis, brain abscess
- mastoid air cells via middle ear- mastoiditis- dangerous bacteria into brain
what is naegleria fowleri?
a brain eating amoeba
CSF fluid dripping through the nose indicates?
damage to the cribiform plate
halo sign indicates?
fluid dripping from nose- red haloed in gray indicates CSF
