Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Digestion > 1 E: Mastication > Flashcards

1 E: Mastication Flashcards

1
Q

Where are the muscles of mastication located?

What do they attach to?

A
  • At various depths in the parotid and infra temporal regions of the face
  • They attach to the mandible & receive their MOTOR innervation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What controls the motor innervation of the muscles of mastication?

A

The mandibular division of the trigeminal nerve CN V3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the muscles of mastication and name the most powerful one?

A

1) Masseter (Most powerful)
2) Temporalis
3) Medial Pterygoid
4) Lateral Pterygoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the innervation of the Masseter muscle?

A

Masseteric branch of mandibular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the innervation of the Temporalis?

A

Deep temporal branches of the mandibular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the innervation of the Lateral Pterygoid?

A

Lateral Pterygoid branch of the mandibular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the innervation of the Medial Pterygoid ?

A

Medial Pterygoid branch of the mandibular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the action of the Masseter muscle?

A

Closes jaw by elevating mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the action of the Temporalis?

A

Elevates mandible and closes jaw

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the action of the Lateral Pterygoid?

A

Opens mouth.

  • Together= protrudes
  • Alternately= grinding action
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the action of the Medial Pterygoid ?

A

Elevates mandible, closing jaw

Together= protrudes mandible 
Solo= protrudes one side
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is Mastication?

A

The mechanical breakdown of ingested material by the teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is chemical breakdown?

A

Ingested material is mixed w/ saliva

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a bolus?

A

A soft, cohesive mass to be swallowed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the Masticatory Cycle?

A

Complex 3-dimensional movement resulting in a “looping” pattern

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

List the movements involving the jaw

A

1) Depression & elevation
2) Lateral movement
3) Anterior-posterior movement

***The TONGUE and HYOID BONE move in coordination w/ jaw movement

17
Q

What are the 3 phases of jaw movement?

A

1) Opening
2) Closing
3) Occlusal

18
Q

What occurs during “opening”?

A

The relaxation of jaw elevators; contraction of jaw openers

19
Q

What occurs during “closing”?

A

Jaw elevates & turns to working side

20
Q

What occurs during “Occlusal phase” ?

A

Jaw nears closure; STRONGEST forces are exerted; represents the LONGEST comment of the cycle

21
Q

What is involved in Protrusion?

A

Lateral pterygoid assisted by medial pterygoid

22
Q

What is involved in Retraction?

A

Posterior fibers of termporalis, deep part of masseter, & geniohyoid and digastric

23
Q

What is involved in Elevation?

A

Temporalis, masseter, medial pterygoid

24
Q

What is involved in Depression ?

A

Gravity, Digastric, geniohyoid, & mylohyoid muscles

Digestion (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions