Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Anatomy > Lecture 28 - Temporal fossae > Flashcards

Lecture 28 - Temporal fossae Flashcards

0
Q

What does slicing involve?

A

Sharp edges coming together or shearing past each other

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

What does does grinding involve?

A

Sliding of rough or texture surfaces

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

What bony structures make up the TMJ?

A

Condyle of mandible

Mandibular fossa of temporal bone

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

What divides the TMJ into ventral and dorsal halves?

A

Cartilaginous articular disc

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

What does the dorsal half of the TMJ capsule do?

A

Allows mandibular condyle to slide rostrally or caudally back into place

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

What does the ventral half of the TMJ capsule do?

A

Permits hinge like opening and closing

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

What prevents lateral displacement of the TMJ?

A

Lateral ligament

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

What prevents posterior displacement of the TMJ?

A

Retroarticular process

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

What prevents ventral displacement of the TMJ?

A

Joint capsule

Surround muscles

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

What produces lateral movements of the mandible?

A

Retractors on same side

Protruders on opposite side

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

What is different about the mandible in most domestic animals?

A

Not fused; joined by a symphysis which allows lateral movement and torsional movement

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

What are the four muscles of mastication?

A

Temporalis - Masseter - Medial pterygoid - Lateral pterygoid

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

What nerve innervates the muscles of mastication?

A

CN V3 - Mandibular nerve

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

What muscles act across the TMJ but arent muscles of mastication?

A

Cranial digastric and Mylohyoid

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

Where does the temporalis muscle originate?

A

Temporal fossa - some dibers on the lateral nuchal crest

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

Where does the Temporalis muscle insert?

A

Coronoid process of the mandible

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

What is the bilateral action of the Temporalis muscle/?

A

Jaw closing

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

What is the unilateral action of the temporalis muscle?

A

Broad origin allows differences in action based on portion of muscle bring used but most cause retraction

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

What is the origin of the masseter muscle?

A

Zygomatic arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the insertion of the masseter?

A

Masseteric fossa and angular process of the mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the bilateral action of the masseter?

A

Jaw closing

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

What is the unilateral action of the masseter?

A

Superficial fibers - Protract

Deep fibers - Draw mandible directly laterally or retract

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

Where does the medial pterygoid originate?

A

Pterygopalatine fossa

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

Where does the medial pterygoid muscle insert?

A

Medial surface of mandibular ramus and angular process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
What is the bilateral action of the medial pterygoid?
Jaw closing
25
What is the unilateral action of the medial pterygoid?
Protraction
26
What is the origin of the lateral pterygoid muscle?
Pterygopalatine fossa
27
What is the insertion point of the lateral pterygoid?
Capsule of the TMJ and the articular disk
28
What is the action of the lateral pterygoid?
Control position of the articular disk during jaw movement
29
What are the general characteristics of animals who are mainly slicing and crushing during mastication?
Temporalis muscle is largest | Zygomatic arch flares laterally for larger coronoid
30
What is the general characteristics of animals who mainly are grinders during mastication?
Masseter and Medal pterygoid are largest | Zygomatic arch is smaller
31
What are the general characteristics of the TMJ in animals that are slicers and crushers?
Unilateral protraction and retraction are restriction due to hinge like TMJ
32
What are the general characteristics of the TMJ in animals who are grinders?
Unilateral protraction and retraction are very important | TMJ flatter and less restricted rostrally
33
What is the origin of the mylohyoid?
Along length of the medial aspect of the mandibular body
34
What is the insertion point of the mylohyoid?
Midline raphe with fibers from opposite muscles and the basihyoid
35
What nerve innervates the mylohyoid?
Mylohyoid nerve
36
What does the mylohyoid nerve come from?
CN V3
37
What is the action of the mylohyoid nerve?
Raises the floor of the oral cavity to support tongue and draws the basihyoid rostrally
38
What is the origin of the digastric muscle?
Paracondylar process
39
What is the insertion point of the digastric muscle?
Ventral and medial aspect of the mandible
40
What nerve innervates the digastric muscle?
Rostral - Mylohyoid N. | Caudal - Facial N.
41
What is the action of the digastric muscle?
Active depression of the mandible
42
What is the occipitomandibularis?
Accessory belly of the caudal digastric found in horses
43
What nerve is responsible for skin and mucosa sensory innervation in the mandibular region?
Mandibular nerve - CN V3
44
What is the mandibular nerve a branch of?
Trigeminal
45
What are the six sensory branches of the mandibular nerve?
Buccal n. - Auriculotemporal n. - Inferior alveolar n. - Mental n. - Mylohyoid n. - Lingual n.
46
What does the buccal nerve pass in relation to?
Rostrally passing dorsal to the lateral pterygoid
47
What does the buccal n. provide sensory to?
Skin of the cheek and underlying oral mucosa
48
What does the auriculotemporal n. supply sensory to?
Parts of the external ear and most of the skin overlying temporalis, masseter, and zygomatic arch
49
What is the path of the auriculotemporal n.?
Passes caudal to retroarticular process to emerge on the superficial surface of the face between the masseter and auricular cartilage
50
What sensory does the inferior alveolar n. provide?
Mandibular teeth
51
What sensory does the mental nerve provide?
Skin of the chin
52
What is the mental n. a branch of ?
Inferior alveolar n.
53
Where does the mental nerve exit?
Mental foramen
54
What sensory information does the mylohyoid n. provide?
Skin ventral to teh mandibular body
55
What motor actions does the mylohyoid n. provide?
Mylohyoid | Rostral digastric muscle
56
What could the mylohyoid nerve be a branch of?
Inferior avelolar
57
What sensory information does the lingual nerve provide?
Rostral two-thirds of the tongue and lingual mucosa
58
What is carried with the lingual n.?
Special sensory and preganglionic parasympathetic fibers from the facial n.
59
What is the path of the lingual nerve?
Runs parallel and rostral to the inferior alveolar n. passing medial to mandible to enter caudal aspect of the oral cavity
60
What is the maxillary a. divided into?
Mandibular - Pterygoid - Pterygopalatine
61
What are some things that the mandibular portion of the maxillary artery provide blood to?
Temporalis, Masseter, and some of pterygoid mass | TMJ and Ear
62
What are two main branches off the mandibular a.?
Inferior alveolar a. | Middle meningeal a.
63
Where does the middle meningeal a. go?
Through the oval foramen into the cranial cavity
64
What does the pterygoplatine a. provide blood to?
Orbit, palate, nasal cavity | Temporalis - and MOST of the pterygoid mass
65
What branch comes off the pterygoplatine?
Buccal artery
66
Where does the maxillary vein form?
caudal to the alar canal from union of veins from pterygoid plexus
67
What joins with the maxillary vein to form the external jugular?
Linguofacial v.

Anatomy (44 decks)

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