Flashcards in Lecture 28 DA Deck (61)
Which bony process makes up most of the nose?
Frontal process of the maxilla.
What is found at the nose midline, seperating it in two?
The septal cartilage.
What encloses the nasal cavity?
Two lateral cartilages, one on each side.
What forms the nostril inferiorly?
Two alar cartilages, one for each nostril.
What is a nare?
What is the nasal septum formed by?
Which bone is found at the nose midline, directly posterior to the septum?
Where is the ethmoid bone?
Directly above the vomer bone, to which it attaches.
What can be found superior to the ethmoid bone?
The cribiform plate.
What is found superior to the cribiform plate, and what sits next to it?
The crista gali, and the olfactory bulb sits beside it.
Where is the posterior nare located?
At the very back of the nostril cavity at the sphenoid bone.
Which bone are the three conchae found on?
What happens if you fracture the cribiform plate?
Leads to infection, haemorrhage and rhinorrhoea.
Does the medial wall of the nasal cavity have any projections?
What is the difference between the superficial layer of the nostril versus the nasal cavity?
Nasal membrane is highly vascular and mucous, whereas the nostril has hair and keratinised skin.
Why is the nasal cavity so highly vascular? What significance does this have for athsmatics?
Blood vessels allow air to warm to room temperature. Cold air makes smooth muscle spasm, bronchioles with no cartilaginous support can spasm in athsmatics. It also humidifies the air.
How much of the nasal cavity is ciliated?
What is the purpose of cilia in the hasal cavity, and how can they be damaged?
They move towards the nasal cavity, to remove pathogens. They are damaged by cigarette smoke.
Where is the olfactory area, and why is it so named?
It is the superior space (top 1/3rd) of both the medial and lateral wall of the nasal cavity. Olfactory nerves pass here.
Where is the nostril vestibule?
The area lined with hair and keratinised skin.
Which area of the nose is most likely damaged in a nosebleed?
The nasal cavity as its vascular.
Name the three turbinates, and the wall they hang off.
Superior, middle, and inferior turbinates, hanging off the lateral wall.
What is the purpose of the turbinates?
Produce turbulence as air is breathed, allowing it to be closer to body temperature and higher humidity.
What is a consequence of the nasal cavity having such small space?
It can easily be congested, especially when infected/inflammed.
What is found beneath each concha?
A meatus, named after its respective concha.
What can be found in the nasal meati?
Superior and middle have openings to the paranasal sinuses, while the inferior has an opening to the lacrima.
What are the four main groups of paranasal sinuses?
Are the paranasal sinuses lined with mucosa?
Where is the frontal sinus?
It is most anterior at around the top of the nose and under the eyes.