Muscles of Mastication

Question 1

What is an origin?

Answer 1

Attached to the least moveable structure

Question 2

What is insertion?

Answer 2

Attached to the more moveable structure

Question 3

What is action?

Answer 3

Movement accomplished by muscle contraction

Question 4

How many muscles are involved in mastication?

Answer 4

4

Question 5

What are the muscles involved in mastication?

Answer 5

Masseter, Temporalis, Medial Pterygoid, and Lateral Pterygoid

Question 6

What nerve controls the muscles of mastication

Answer 6

V3

Question 7

What does the nerve V3 used for in mastication?

Answer 7

Coordinat movement of teeth for mastication

Question 8

What is mastication?

Answer 8

Where digestion starts

Question 9

What is the process of mastication?

Answer 9

Ingestion of food and muscles coordinate to place food between opposing teeth

Question 10

What is amylase?

Answer 10

An enzyme that starts digestion. (it breaks down the starches)

Question 11

The muscle masseter is controlled by what nerve?

Answer 11

V3

Question 12

What is the action of the masseter muscle?

Answer 12

Elevation of the mandible

Question 13

How many parts are there to the masseter muscle?

Answer 13

2

Question 14

What are the parts of the masseter muscle?

Answer 14

Superficial and Deep

Question 15

The origin of the Superficial masseter is attached where?

Answer 15

Anterior 2/3; inferior zygoma

Question 16

The origin of the deep masseter is attached where?

Answer 16

Posterior 1/3; medial of zygoma

Question 17

The insterion of superficial masseter attaches where?

Answer 17

Lower 1/2 external surface of ramus, angle of mandible

Question 18

The insertion of deep masseter attaches where?

Answer 18

Lower 1/2 of external ramus

Question 19

Is the masseter a strong or weak muscle

Answer 19

Strong

Question 20

The muscle Temporalis is controlled by what nerve?

Answer 20

V3

Question 21

The origin of the temporalis is where

Answer 21

Temporal fossa

Question 22

The insertion of the temporalis is where?

Answer 22

Coronoid process

Question 23

**Where do the fibers of the temporalis pass?

Answer 23

Medial to the zygomatic arch

Question 24

What is the action of the temporalis muscle?

Answer 24

Elevation of the mandible

Question 25

What bones are included in the temporal fossa?

Answer 25

Temporal, Parietal, Frontal, Spheniod

Question 26

Retrusion?

Answer 26

Like moving the mandible posterior

Question 27

Is the temporalis a powerful muscle?

Answer 27

NO

Question 28

The muscle Medial Pterygoid is controlled by what nerve?

Answer 28

V3

Question 29

What is the origin of the medial pterygoid muscle?

Answer 29

Medial of the lateral pterygoid pate

Question 30

Where is the insertion of the medial pterygoid muscle?

Answer 30

Medial of the mandibular angle

Question 31

What is the action of the medial pterygoid muscle?

Answer 31

Elevation of the mandible

Question 32

What muscle with the action of the masseter creates a supportive "sling" for the mandible?

Answer 32

Medial pterygoid muscle

Question 33

What is the origin of the inferior Lateral Pterygoid muscle?

Answer 33

Lateral of the lateral pterygoid plate

Question 34

How many portions of the Lateral pterygoid muscle are there

Answer 34

2

Question 35

What are the portions of the Lateral pterygoid muscle?

Answer 35

Inferior and Superior

Question 36

What muscle attaches to the greater wing of the Spheniod bone?

Answer 36

Lateral Pterygoid muscle

Question 37

What nerve controls the Lateral Pterygoid muscle?

Answer 37

V3

Question 38

What portion of the lateral pterygoid muscle is bigger?

Answer 38

Inferior

Question 39

What is the origin of the superior Lateral pterygoid muscle

Answer 39

Greater wing of the spheniod

Question 40

What is the insertion of the inferior lateral pterygoid muscle?

Answer 40

Anterior of Condyle neck

Question 41

What is the insertion of the superior lateral pterygoid muscle?

Answer 41

Some fibers to TMJ capsule

Question 42

What is the action of the lateral pterygoid muscle?

Answer 42

- slight depression of mandible - protrusion of mandible - "shifting" of the mandible

Question 43

How many actions doe the lateral pterygoid muscle have?

Answer 43

3

Question 44

What is a minor action of the lateral pterygoid muscle?

Answer 44

Slight depression of mandible

Question 45

What action is the Lateral pterygoid muscle known for?

Answer 45

Protrusion of mandible

Question 46

When you have a bilateral contraction of the Lateral pterygoid muscle what happens?

Answer 46

"PROTRUSION" | You will get protrusion of the mandible

Question 47

When you have unilateral contraction of the lateral pterygoid muscle what happens?

Answer 47

"SHIFTING" | If you contract muscle on the right mandible moves left. If you contract muscle on the left mandible moves right

Question 48

What is hypertrophy?

Answer 48

Enlarge the volume of the cells in the muscle tissue

Question 49

When you enlarge the cells of muscle tissue what is it called?

Answer 49

Hypertrophy