Sinus Nose and Ear Anatomy Flashcards Preview

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Flashcards in Sinus Nose and Ear Anatomy Deck (46):
1

Le Fort Fractures can disrupt this bone in the nasal cavity

The ethmoid bone's cribiform plate

2

The three mucosa of the nasal cavity

Olfactory
Respiratory
Keratinised Stratified Squamous

3

Bones of the Lateral Wall of the Nasal Cavity

Maxilla
Nasal
Ethmoid
Frontal
Palatine

4

Bones of the Medial Wall

Vomer
Ethmoid
(Also hyaline cartilage)

5

What cranial nerve is olfactory?

CN 1

6

Where does the blood supply originate from

The internal and external carotids

7

The ophthalmic artery becomes...

Anterior and Posterior Ethmoidal Arteries

8

The maxillary artery becomes the...

Sphenopaletine and Greater Paletine Arteries

9

The Facial Artery becomes the...

Lateral Nasal branch of the facial artery and
The septal branch of the superior labial

10

What is Keisselbach's Area

Arterial Anastamosis on the nasal septum
This is a common site for nosebleeds (epistaxis)

11

Which two branches of the trigeminal nerve supply the lateral walls and the septum of the nasal cavity?

CN V1 and CN v2
a.k.a. ophthalmic and maxillary

12

Which arteries originate from the external carotid artery/

Facial and Maxillary

13

Which artery originates from the internal carotid artery?

Ophthalmic

14

Where is the Eustachian tube located and what is its function?

Located in the lateral wall of the nasopharynx
Its function is to link the middle ear to the nasopharynx

15

What mucosa lines the sinuses?

Mucous Secreting Respiratory

16

How does the mucous drain into the nasal cavities?

Through the ostia of the lateral walls

17

Where do the frontal and maxillary sinus drain?

The middle meatus

18

Where does the sphenoidal sinus drain?

The sphenoethmoidal recess

19

Nasolacrimal Duct drains into the?

Inferior meatus

20

The ethmoidal sinus drains where?

Both the superior and the middle meatus

21

What is sinusitis?

Inflammation of the paranasal sinus mucosa

22

Where can sinus pain be referred to?

The teeth

23

The three bones of the middle ear cavity and their joint types

Incus
Stapes
Malleus
Synovial Joints

24

Which foramen does the facial nerve pass through?

The stylomastoid foramen in the floor of the middle ear cavity

25

Where does the facial nerve originate?

The brain stem where the pons and medulla meet

26

Which cranial nerve supplies the laryngopharynx?

CN 10

27

What does the CN 9 supply? (glossopharyngeal)

Nasopharynx, Oropharynx, Middle Ear Cavity, Tonsils, Eustachian Tube

28

What supplies the tympanic membrane?

CNv3 supplies the external surface
CN9 supplies the internal surface

29

What is the function of the stapedius?

To minimise movement of the stapes and protect against excessive noise in the internal ear

30

What is perilymph?

The fluid in the bony labyrinth

31

Where is endolymph?

This is found in the cochlear and semicircular duct

32

What is the chorda tympani

Branch of the facial nerve passing through the tympanic membrane
Responsible for parasympathetic innervation to anterior 2/3rds of tongue, sub-mandibular and sublingual salivary glands.

33

What feature is responsible for the production of earwax?

Ceruminous Glands

34

An H shaped suture formed of the frontal, parietal, sphenoid and temporal bones which is thinnest part of the skull

The pterion

35

Which part of the stapes fits into the oval window?

The base

36

Where does the facial nerve exit the posterior cranial fossa?

Internal acoustic Meatus

37

What provides parasympathetic innervation to the sub-mandibular and sublingual salivary glands?

The chorda tympani branch of the facial nerve

38

Where do the muscles of facial expression originate and insert?

Originate on bone
Insert on superficial fascia

39

What is lost in illness, making a patient have 'sunken cheeks'?

The buccal fat pad

40

How do you clinically test the the muscles of facial expression and CN7 motor function?

Ask a patient to -
Frown
Close eyes tightly
Smile
Puff out cheeks

41

What bone does the otic capsule sit in?

The temporal bone

42

What are the three semicircular canals?

Anterior superior
Lateral
Posterior

43

What is the cupula?

This is the apex of the cochlea spiral

44

These are present within the semicircular canals

Semi circular ducts filled with endolymph

45

Where does the vestibulocochlear nerve connect?

The junction at the brainstem between the pons and medulla
(just like CN7)

46

Where does the CN8 split into the cochlear and vestibular nerves?

The internal acoustic meatus