Lecture 27 - Nose and Paranasal Sinuses Flashcards
What is the “bridge of the nose”
nasal bones
what forms most of the nostril?
alar cartilage
where is the cribriform plate?
superior part of the ethmoid bone separates the nasal cavity and the meninges
if broken - infection, bleeding and CSF can spread to meninges or nasal cavity
The olfactory bulb sits where?
above the cribriform plate - there are holes that project the nerves about smell
Describe the medial wall of the nasal cavity
lined by highly vascular mucous membrane - warms up air as it comes in
what makes up the vestibule
skin and hair - to trap foreign particles
How makes Turbinates are on the lateral wall?
3
Sup. Concha
mid. concha
inf. concha
What is the function of the concha?
create turbulence and warm the air coming in a little bit longer
What are the paranasal sinuses?
extensions of the lateral wall. Take the vascua mucosa with them and a sensory inneravtion (sinusitis)
Ethmoid sinus -
Frontal sinus
spheniod sinus (posteriorly)
mxillary sinus (laterally)
What innervaes the Frontal/ethmoid and sphenoid sinuses?
opthalmic division (1st) of trigeminal nerve (CN_)
What innervates the maxillary sinuses?
superior alveolar nerve (CNV2)
The opening to the maxillary sinus is…
supero-medially
bacteria that migrate in are hard to get out
What is the sphenoethmoidal recesss?
Where the opening of sphenoidal sinus is.
containsa posterior ethmoidal air cells
directly into the superior meatus
What opening are around the middle meatus?
opening of frontal sinus and anterior ethmoidal air cells
Thereis the opening of the middle ethmoidal cells into the swelling called Bulla ethmoidalis
The maxillary sinus opens in the posterior end of the Haitus semilunaris with is a groove below the opening to the frontal sinus
What is the the one opening in the inferior meatus?
nasolacrimal duct - openin gof the lacrimal sac
