Lecture 27 - Nose and Paranasal Sinuses Flashcards Preview

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Flashcards in Lecture 27 - Nose and Paranasal Sinuses Deck (23):
1

What is the "bridge of the nose"

nasal bones

2

what forms most of the nostril?

alar cartilage

3

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

4

The olfactory bulb sits where?

above the cribriform plate - there are holes that project the nerves about smell

5

Describe the medial wall of the nasal cavity

lined by highly vascular mucous membrane - warms up air as it comes in

6

what makes up the vestibule

skin and hair - to trap foreign particles

7

How makes Turbinates are on the lateral wall?

3

Sup. Concha

mid. concha

inf. concha

8

What is the function of the concha?

create turbulence and warm the air coming in a little bit longer

9

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)

10

What innervaes the Frontal/ethmoid and sphenoid sinuses?

opthalmic division (1st) of trigeminal nerve (CN_)

11

What innervates the maxillary sinuses?

superior alveolar nerve (CNV2)

12

The opening to the maxillary sinus is...

supero-medially

bacteria that migrate in are hard to get out

13

What is the sphenoethmoidal recesss?

Where the opening of sphenoidal sinus is.

containsa posterior ethmoidal air cells

directly into the superior meatus

14

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

15

What is the the one opening in the inferior meatus?

nasolacrimal duct - openin gof the lacrimal sac

16

What does the lacrimal sac collect?

fluid from the lacrimal gland - tears (if there are too many tears they go into the nasolacrimal duct and into the nasal cavity)

17

Each quadrant has the same blood supply to medial and lateral sides

what supplies the posterior quadrant?

Shpenopalatine artery - big artery

18

what supplies the superior quadrant?

ethmoidal arteries - branch of opthalmic artery

19

what supplies the inferior quadrant?

branches of the greater palatine artery

come int the mouth and project up through the hard palate

20

what supplies the ant quadrant in a the lateral half?

braches of facial artery

21

what supplies the ant quadrant in a the medial half?

labial arteries associate with the lip

22

What innervates the anterior/superior half of the nasal cavity?

branches of trigeminal

anterior ethmoidal nerves (CNv1)

23

What innervates the posterior/inferior half of the nasal cavity?

bracnhes of the maxillary division of the trigeminal nerve

greater and lesser palatine nerves (CNV2) + nasopalatine