2: Anatomy 1 - nose Flashcards Preview

ENT Week 1 2017/18 > 2: Anatomy 1 - nose > Flashcards

Flashcards in 2: Anatomy 1 - nose Deck (77)
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1

From superior to inferior, name the parts of the external nose.

Root (between eyebrows)

Dorsum (the bridge of the nose)

Apex (tip of the nose)

Septum (separates the right and left nasal cavities)

Philtrum (indentation in the midline, just superior to the upper lip)

2

Which bone forms the bridge of the nose?

Nasal bone

3

What are the sides of the nose found on either side of the apex?

Ala

4

What is the technical name for the nostrils?

Nares

5

Which two bones make up the nasal septum?

Perpendicular plate of the ethmoid bone

Vomer

6

Apart from the vomer, which bone forms the superior part of the nasal septum?

Ethmoid bone

7

What are the two important structures of the roof of the nasal cavity?

Which bone do they belong to?

Cribriform plate

Crista galli

Both part of the ethmoid bone

8

In which cranial fossa are the cribriform plate and crista galli found?

Anterior cranial fossa

9

Which ganglia of CN I sit on the cribriform plate of the ethmoid bone and are separated by the crista galli?

Olfactory bulbs

10

Which structures of the ethmoid bone are found on the lateral wall of the nasal cavities?

Orbital plates

Superior and middle conchae

Ethmoidal air cells

11

Which part of the ethmoid bone separates the nasal cavity from the bony orbit?

Orbital plate

12

Which of the three conchae are part of the ethmoid bone?

Superior and middle conchae

Inferior conchae is its own thing

13

Which particular part of the ethmoid bone makes up the nasal septum?

Perpendicular plate

14

Is the nasal septum always found in the midline?

No

Slightly deviated in most people

15

Which type of fracture can damage the cribriform plate of the ethmoid bone?

Which types specifically?

Le Fort fracture

II & III

16

Why can Type II & III Le Fort fractures cause meningeal infections?

Transmission of bacteria from

nasal cavity and paranasal sinuses

to

anterior cranial fossa

via damaged cribriform plate

17

The conchae are found on the (medial / lateral) sides of the nasal cavities.

lateral sides

medial side is quite featureless

18

Which bone joins with the maxilla to form the hard palate at the floor of the nasal cavity?

Palatine bone

19

Which parts of the sphenoid bone act as insertions for the medial and lateral pterygoids and is found near the nasal cavity?

Pterygoid plates

(remember medial CLOSES the jaw and lateral OPENS it)

20

The cribriform plate is shaped like a sieve - why?

Allows passage of CN I (olfactory nerve)

21

The ethmoid air cells form one of the paranasal ___.

paranasal sinuses

22

Is the inferior concha part of the ethmoid bone?

No

Superior and middle concha ARE

23

The stratified squamous epithelium at the anterior part of the nasal cavity is ___.

What does this achieve?

keratinised

Stops foreign stuff getting into the nasal cavities

24

Most of the nasal cavity is lined with respiratory epithelium.

What is this specifically?

CILIATED PSEUDOSTRATIFIED COLUMNAR epithelium with GOBLET CELLS

Don't forget this

25

What kind of epithelium is found at the superolateral part of the nasal cavity?

Olfactory epithelium

26

Where is olfactory epithelium found?

What is its function?

Superolateral nasal cavity

Sense of smell

27

Which cranial nerve is responsible for smell?

CN I

Olfactory nerve

28

Which structures do the nerve fibres for CN I pass into once they have gotten up through the cribriform plate?

Olfactory bulbs

29

What type of fibres are found in CN I?

Special sensory

(Optic nerve is also special sensory because sight is one of the special senses)

30

Nerve fibres for CN I pass through which part of the ethmoid bone?

Cribriform plate