Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

ANAT1119 - Orofacial Anatomy I > CH28 - Muscles of Mastication > Flashcards

CH28 - Muscles of Mastication Flashcards

Week 10

1
Q

The end attached to the least movable structure

A

Origin

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

The other end, attached to the more movable structure (moves toward origin)

A

Insertion

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

the work that is accomplished when muscle fibers contract

A

Action

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

Muscles of Mastication

A
  • Masseter
  • Temporalis
  • Medial pterygoid
  • Lateral pterygoid
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The muscles of mastication are attached to the mandible & are responsible for

A
  • Elevating
  • Protruding
  • Retruding
  • Laterally
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Muscles of mastication are innervated by the

A

5th cranial nerve (trigeminal nerve)

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

Where does the blood supply for the muscles of mastication come from?

A

Maxillary artery

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

Most powerful of the muscles of mastication

A

Masseter

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 (closes)

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

What is the origin of the masseter muscle?

A

2 areas on the zygomatic arch

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

Where is the insertion of the masseter muscle?

A

Into the angle of the mandible on the lateral side

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

What is the action of the temporalis muscle?

A

Elevate or retrude the mandible

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

What is the origin of the temporalis muscle?

A

From temporal fossa

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

Where is the insertion of the temporalis muscle?

A

Into coronoid process of mandible​

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

What is the action of the medial pterygoid muscle?

A

Elevates the mandible (closes)

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

What is the origin of the medial pterygoid muscle?

A

Medial side of lateral pterygoid plate & fossa or Maxillary tuberosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where is the insertion of the medial pterygoid muscle?

A

Angle of mandible (medial side)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the action of the lateral pterygoid muscle?

A
  • Protrude & depress mandible (both heads function)
  • Lateral excursion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the origin of the lateral pterygoid muscle?

A
  • Superior-infratemporal crest of the greater wing of sphenoid bone
    -Inferior-lateral side of the lateral pterygoid plate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Where is the insertion of the lateral pterygoid muscle?

A

Anterior border of the TMJ & neck of the condyle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Horseshoe-shaped bone suspended beneath the mandible, with the open end of the horseshoe pointed posteriorly

A

Hyoid bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Suprahyoid muscles

A

Above hyoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Infrahyoid muscles

A

Below hyoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Suprahyoid group

A
  • Digastric muscle
  • Mylohyoid muscle
  • Geniohyoid Muscle
  • Stylohyoid Muscle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Muscle fibers at opposite ends & tendon in the middle
Digastric muscle
26
What is the action of the digastric muscle?
Retrudes the mandible, lifts the hyoid bone, pulls larynx up, pulls mandible down
27
What is the origin of the digastric muscle?
Digastric notch of temporal bone just medial to the mastoid process behind the ear
28
Where is the insertion of the digastric muscle?
Digastric fossa on inferior surface of mandible at the midline
29
What 2 nerves supply the digastric muscle?
- Trigeminal nerve - Facial nerve
30
Muscle that forms floor of the mouth
Mylohyoid muscle
31
What is the action of the mylohyoid muscle?
Depression of the mandible, elevation of the hyoid bone
32
What is the origin of the mylohyoid muscle?
The mylohyoid line on the medial surface of the mandible (bilaterally)
33
Where is the insertion of the mylohyoid muscle?
Hyoid bone
34
What 2 nerves supply the mylohyoid muscle?
- Trigeminal nerve - Cranial nerve
35
What artery supplies blood to the mylohyoid muscle?
Inferior alveolar artery
36
What is the action of the geniohyoid muscle?
Depresses mandible, elevates hyoid bone
37
What is the origin of the geniohyoid muscle?
Inferior genial tubercle/mental spine on lingual of mandible at midline
38
Where is the insertion of the geniohyoid muscle?
Into hyoid bone at the midline
39
What nerve supplies the geniohyoid muscle?
First cervical nerve
40
What artery supplies blood to the geniohyoid muscle?
Lingual artery
41
What is the action of the stylohyoid muscle?
Pulls hyoid bone up and back
42
What is the origin of the stylohyoid muscle?
Styloid process (base of skull)
43
Where is the insertion of the stylohyoid muscle?
Posterior of hyoid bone
44
What nerve supplies the stylohyoid muscle?
Facial nerve
45
What 2 arteries supply blood to the stylohyoid muscle?
- Facial artery - Occipital artery
46
Infrahyoid group
- Omohyoid - Sternohyoid - Sternothyroid - Thyrohyoid
47
Two bellies separated by a tendon
Omohyoid Muscle
48
What is the action of the omohyoid muscle?
Pulls hyoid bone down
49
What is the origin of the omohyoid muscle?
Border of scapula, & hyoid bone
50
Where is the insertion for the omohyoid muscle?
Sternocleidomastoid muscle
51
What nerves supply the omohyoid muscle?
Second & third cervical nerves
52
What arteries supply blood to the omohyoid muscle?
Lingual & superior thyroid arteries
53
What is the action of the sternohyoid muscle?
pulls hyoid bone down
54
What is the origin of the sternohyoid muscle?
Upper border of sternum
55
Where is the insertion of the sternohyoid muscle?
Front of hyoid bone
56
What nerves supply the sternohyoid muscle?
Second & third cervical nerves
57
What arteries supply blood to the sternohyoid muscle?
Lingual & superior thyroid arteries
58
What is the action of the sternothyroid muscle?
Pulls the larynx down
59
What is the origin of the sternothyroid muscle?
Sternum
60
Where is the insertion of the sternothyroid muscle?
Thyroid cartilage of the larynx
61
What nerves supply the sternothyroid muscle?
Second & third cervical nerves
62
What artery supplies blood to the sternothyroid muscle?
Superior thyroid artery
63
What is the action of the thyrohyoid muscle?
Lifts thyroid cartilage & raises larynx; helps depress hyoid bone
64
What is the origin of the thyrohyoid muscle?
Thyroid cartilage
65
Where is the insertion of the thyrohyoid muscle?
Hyoid bone
66
What nerve supplies the thyrohyoid muscle?
Cervical nerve
67
What artery supplies blood to the thyrohyoid muscle?
Superior thyroid artery
68
What is the action of the sternocleidomastoid muscle?
Tilting & rotating the head
69
What is the origin of the sternocleidomastoid muscle?
Sternum & medial third of clavicle
70
Where is the insertion of the sternocleidomastoid muscle?
Mastoid process of temporal bone
71
What nerve supplies the sternocleidomastoid muscle?
11th cranial nerve (accessory nerve)
72
What artery supplies blood to the sternocleidomastoid muscle?
Branch of external carotid artery
73
What is the action of the trapezius muscle?
Shrugging shoulders; elevates & slightly rotates scapula
74
What is the origin of the trapezius muscle?
occipital bone & spinous process of cervical & thoracic vertebrae
75
Where is the insertion of the trapezius muscle?
Scapula & clavicle
76
What nerves supply the trapezius muscle?
Cervical nerves 2,3,4
77
The ___ muscle can cause TMJ pain when in spasm
Trapezius

ANAT1119 - Orofacial Anatomy I (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions