Brainscape's Knowledge GenomeTM

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


See full index

2.4 Anatomy > Muscles of Mastication and Muscles of Facial Expression > Flashcards

Muscles of Mastication and Muscles of Facial Expression Flashcards

1
Q

What are the muscles of mastication?

A

Masseter
Temporalis
Lateral pterygoid
Medial pterygoid

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

What is the origin of the temporalis muscle?

A

Floor of temporal fossa and deep surface of temporal fascia

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

What is the insertion of the temporalis muscle?

A

Tip and medial surface of coronoid process
Anterior border of ramus of mandible

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

What is the innervation of the temporalis muscle?

A

Mandibular nerve

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

What is the action of the temporalis muscle?

A

Elevates mandible, closing jaw
Posterior fibres retrude mandible after protrusion

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

What is the origin of the masseter muscle?

A

Inferior border and medial surface of the zygomatic arch

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

What is the insertion of the masseter muscle?

A

Lateral surface of ramus of mandible
Coronoid process

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

What is the innervation of the masseter muscle?

A

Mandibular nerve

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

What is the action of the masseter muscle?

A

Elevates the mandible, closing jaw
Deep fibres retrude the mandible

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

What is the origin of the medial pterygoid muscle?

A

Deep head: Medial surface of the lateral pterygoid plate and pyramidal process of palatine bone
Superficial head: Tuberosity of maxillay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the insertion of the medial pterygoid muscle?

A

Medial surface of ramus of mandible, inferior to mandibular foramen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the innervation of the medial pterygoid muscle?

A

Mandibular nerve

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

What is the action of the medial pterygoid muscle?

A

Elevates the mandible, closing the jaw
Acting together, it protrudes the mandible
Acting alternately, its produces a grinding motion

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

What is the origin of the lateral pterygoid muscle?

A

Superficial head: Greater wing of sphenoid bone
Inferior head: lateral surface of lateral pterygoid plate

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

What is the innervation of the lateral pterygoid muscle?

A

Neck of mandible
Articular disc
Capsule of TMJ

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

What is the innervation of the lateral pterygoid muscle?

A

Mandibular nerve

17
Q

What is the action of the lateral pterygoid muscle?

A

Acting together, it protrudes the mandible
Depresses chin
Acting alternately and alone, it produces side-to-side movements of the mandible

18
Q

Which are the muscles of facial expression around the eye?

A

Oribicularis oculi
Frontalis
Corrugator supercilli

19
Q

Which muscles of facial expression are found around the nose?

A

Procerus
Nasalis
Depressor septi

20
Q

Which muscles of facial expression are found around the mouth?

A

Orbicularis oris
Buccinator
Upper group
Lower group

21
Q

Which muscles make up the upper group of muscles of facial expression around the mouth?

A

Risorius
Zygomaticus major
Zygomaticus minor
Levator anguli oris
Levator labii superioris
Levator labii superioris alaeque nasi

22
Q

Which muscles make up the lower group of muscles of facial expression around the mouth?

A

Mentalis
Depressor labii inferioris
Depressor anguli oris

23
Q

What is the modiolus?

A

The intersection of the muscles of facial expression in the corner of the mouth?

24
Q

Which nerve innervates the muscles of facial expression?

A

Facial nerve

25
Q

What is the origin of the orbicularis oris?

A

Midline of maxilla superiorly and mandible inferiorly

26
Q

What is the insertion of orbicularis oris?

A

Skin of mucous membrane of lips and onto itself

27
Q

What is the action of orbicularis oris?

A

Narrows mouth and closes lips

28
Q

What is the origin of the buccinator?

A

Posterior part of maxilla
Mandible opposite molar teeth
Pterygomandibular raphe

29
Q

What is the insertion of the buccinator?

A

Into the lips
Blends with the orbicularis oris

30
Q

What is the action of the buccinator?

A

Contraction presses the cheek against the teeth
Helps keep food out of the vestibule of the mouth and between the teeth
Muscle is relaxed when cheeks are puffed out

31
Q

What facial expression is produced by the risorius?

A

Grinning, through contraction by pulling the corner of the mouth upwards and laterally

32
Q

What is the origin and insertion of the levator labii superioris?

A

Origin: Arises from the maxilla superior to the infraorbital foramen
Insertion: Skin of upper lip

33
Q

What facial expression is produced by the levator labii superioris?

A

Sadness

34
Q

What facial expression is produces by the zygomaticus major and minor?

A

Smiling by raising the corner of the mouth and moving it laterally

35
Q

What is the origin and insertion of the zygomaticus major?

A

Origin: Arises deep to orbicularis oris
Insertion: Skin at corner of mouth

36
Q

What is the origin and insertion of the zygomaticus minor?

A

Origin: Arises from zygomatic bone
Insertion: Upper lips medial to corner of mouth

2.4 Anatomy (10 decks)

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