Nasal cavity and Paranasal Sinuses Flashcards Preview

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Flashcards in Nasal cavity and Paranasal Sinuses Deck (53)
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1

What is the nasal diverticulum?

a false nostril; pouch

2

Where is the nasal diverticulum located?

dorsal to the lamina or alar cartilage

3

What species is the nasal diverticulum in?

the horse

4

Where is the nasolacrimal duct located in the horse?

within the nostril

5

At rest, what is the shape of the nostril in the horse?

comma shaped

6

During activity, what is the shape of the nostril in the horse?

huge and circular shaped

7

What are the meatuses in the nasal cavity?

dorsal, middle, ventral, common, and ethmoid

8

What are the nasal chonchae in the nasal cavity?

dorsal, ventral, ethmoidal

9

What is the ethmoidal conchae also known as?

turbinates

10

What is the organization of the bone in the skull?

inner trabecular bone with an external cortical bone (laminal layer) and internal cortical bone (laminal layer)

11

What does the trabecular bone contain?

bone marrow

12

What is the trabecular bone also known as?

the dipole

13

What part of the bone of the skull becomes the paranasal sinus?

the dipole part

14

What is a direct paranasal connection?

paranasal sinus is connected to the middle meatus via the nasal maxillary aperture

15

What is an indirect paranasal connection?

paranasal sinus is connected to another paranasal sinus and that paranasal sinus is connected to the middle meatus

16

What should a normal healthy paranasal sinus be filled with?

air

17

What is the difference between the frontal sinus in the horse and every other species?

it is undivided, whereas it is divided in everything else

18

What is the frontal sinus connected to in everything but the horse?

the ethmoid meatus

19

What is the difference between the maxillary sinus in the horse and every other species?

it is divided in the horse, whereas it is undivided in all other species

20

What is the maxillary sinus connected to in all species?

the middle meatus

21

What are the divisions of the frontal sinus in the ox?

rotstral frontal sinus and caudal frontal sinus

22

Which division of the frontal sinus in the cattle is the most clinically relevant and the largest?

the caudal frontal sinus

23

What are the divisions of the rostral frontal sinus?

lateral rostral frontal, medial rostral frontal, and intermediate rostral frontal

24

How do the rostral frontal sinus divisions of the ox connect to the ethmoid meatus?

via their own connection

25

What are the diverticula associated with the caudal frontal sinus?

cornual, nuchal, and post orbital

26

If an ox has horns, when does the cornual diverticula penetrate the cornual process?

between 4-6 months of age

27

Where is the nucal diverticula of the caudal frontal sinus in the ox located?

it extends out of the frontal bone into the occipital bone

28

Where is the post orbital diverticula of the caudal frontal sinus of the ox located?

right behind the eye

29

What does the maxillary sinus of the ox communicate with?

the middle nasal meatus

30

What is the thin projection of bone located on the caudal end of the maxillary sinus called?

the lacrimal bulla; thicker in small ruminants