Head Muscles Flashcards Preview

Anatomy - Large Animal > Head Muscles > Flashcards

Flashcards in Head Muscles Deck (37)
Loading flashcards...
1

What are the muscles of the head in the horse (that we need to know)?

levator nasolabialis, caninis, levator labii superioris, zygomaticus, depressor labii inferioris, malaris

2

What is the origin of the levator nasolabialis in the horse?

frontal and nasal bones

3

In the horse, what does the levator nasolabialis do before it inserts?

it splits into a dorsal and ventral branch

4

In the horse, what does the dorsal branch of the levator nasolabialis insert on?

the upper lip and the lateral wing of the nostril

5

In the horse, what does the ventral branch of the levator nasolabialis insert on?

the commissure of the lips

6

What is the function of the levator nasolabialis?

elevates the upper lip and comissure and dilates the nostril

7

In the horse, what is the origin of the caninis?

maxilla near the facial crest

8

In the horse, what is the insertion of the caninis?

lateral wing of the nostril

9

What is the course of the caninis in the horse?

courses in between both branches of the levator nasolabialis

10

What is the function of the caninis?

dilates the nostril

11

In the horse, what is the origin of the levator labii superioris?

the junction of the lacrimal, zygomatic, and maxillary bones

12

In the horse, where does the levator labii superioris insert?

on the upper lip via the same tendon

13

What is the function of the zygomaticus?

it retracts and elevates the angle of the mouth

14

In the horse, what is the origin of the depressor labii inferioris?

alveolar border of the mandible

15

In the horse, what is the insertion of the depressor labii inferioris?

the lower lip

16

What is the function of the depressor labii inferioris?

depresses and retracts the lower lip

17

For nerve blocking in the horse, what facial muscles need to be pushed out of the way?

the levator labii superioris and depressor labii inferioris

18

What are the facial muscles of the ruminant?

levator nasolabialis, levator labii superioris, caninis depressor labii superioris, zygomaticus, malaris and depressor labii inferioris

19

In the ruminant, what is the origin of the levator nasolabialis?

rostral part of the frontal bone and frontalis muscle

20

In the ruminant, what does the levator nasolabialis do after its origin?

divides into superficial and deep portions

21

In the ruminant, where does the superficial part of the levator nasolabialis insert?

nostril and upper lip

22

In the ruminant, where does the deep part of the levator nasolabialis insert?

lateral nasal cartilages, incisive bone, and lateral part of the nostril

23

In the ruminant, what is the origin of the levator labii superioris?

the facial tuberosity

24

In the ruminant, what is the insertion of the levator labii superioris?

the muzzle

25

What is the course of the levator labii superioris in the ruminant?

it courses between the two portions of the levator nasolabialis muscle

26

In the ruminant, what is the function of the levator labii superioris?

elevates the lip

27

In the ruminant, what is the origin of the caninis?

the facial tuberosity

28

In the ruminant, what is the insertion of the caninis?

the lateral portion of the nostril

29

Where does the caninis course in the ruminant?

between the two portions of the levator nasolabialis

30

In the ruminant, what is the origin of the depressor labii superioris?

maxilla and facial tuberosity