Brainscape's Knowledge GenomeTM

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


See full index

Module 4 - mastication and Occlusion > Muscles of Mastication > Flashcards

Muscles of Mastication Flashcards

1
Q

where does the condyle sit?

A

glenoid fossa
behind articular eminence

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

what bone is the articular eminence apart of?

A

temporal bone

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

what TMJ movement is jaw opening?

A

hinge

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

what TMJ movement is wide jaw opening?

A

hinge and slide

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

what TMJ movement is protrusion?

A

slide

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

what TMJ movement is lateral excursion?

A

lateral movement and rotation around vertical axis

translation

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

dentate chewing forces?

A

70-150N

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

edentulous chewing forces?

A

4-55N

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

maximum clenching forces between molars?

A

500-700N

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

where do you find the muscles of mastication?

A

between skull and mandible

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

what are the 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
12
Q

origin and insertion of the superficial masseter?

A

origin: zygomatic arch
insertion: angle/ ramus of mandible

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

action of the superficial masseter?

A

jaw elevation (closing)
minor protrusion

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

innervation of superficial masseter?

A

Vc motor root - masseteric nerve

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

origin and insertion of the deep masseter?

A

origin: inner aspect of zygomatic arch
insertion: angle/ ramus of mandible

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

action of deep masseter?

A

jaw elevation (closing)

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

innervation of deep masseter?

A

Vc motor root - masseteric nerve

18
Q

origin and insertion of temporalis?

A

origin: inferior temporal line and fascia
insertion: coronoid process

19
Q

action of temporalis?

A

jaw elevation and retrusion (posterior fibres)

20
Q

innervation of temporalis?

A

Vc motor root - deep temporal nerve

21
Q

origin and insertion of upper head lateral pterygoid?

A

origin: infratemporal surface of greater wing of sphenoid
insertion: capsule and articular disc of TMJ

22
Q

origin and insertion of lower head of lateral pterygoid?

A

origin: lateral aspect of lateral pterygoid plate
insertion: pterygoid fovea below head of condyle

23
Q

action of lateral pterygoid?

A

initial opening (hinge in lower joint space, suprahyoids only)

wide opening (anterior and inferior translation of condyle, assisted by inferior lateral pterygoids)

24
Q

innervation of lateral pterygoid?

A

Vc motor root - nerve to lateral pterygoid

25
Q

function of lower head of lateral pterygoid?

A

pulls condyle forward
bilateral protrusion and assisted opening
unilateral excursion

26
Q

function of super head of lateral pterygoid?

A

active during retrusion and closing

27
Q

origin and insertion of medial pteryoid?

A

origin: medial aspect of lateral pterygoid plate and maxillary tuberosity

insertion: medial aspect of ramus/ angle of mandible

28
Q

action of medial pterygoid?

A

jaw elevation
assists protrusion and lateral excursions (unilateral)

29
Q

innervation of medial pterygoid?

A

Vc motor root - nerve to medial pterygoid

30
Q

origin and insertion of geniohydoid?

A

origin: inferior mental spine and inferior genial tubercle

insertion: hyoid bone

31
Q

action of geniohyoid?

A

when hyoid fixed: jaw opening and retrusion
when hyoid not fixed: raise and forward hyoid

32
Q

innervation of geniohyoid?

A

C1 (with hypoglossal)

33
Q

where is the mylohyoid?

A

median raphe

34
Q

action of mylohyoid?

A

when hyoid fixed: jaw opening
when hyoid not fixed: raise hyoid and FOM

35
Q

innervation of mylohyoid?

A

Vc motor root - nerve to mylohyoid (branch of IAN)

36
Q

origin and insertion of anterior belly of digastric?

A

origin: digastric fossa
insertion: intermediate tendon

37
Q

action of anterior belly of digastric?

A

hyoid fixed: jaw opening
hyoid not fixed: raises hyoid

38
Q

innervation of anterior belly of digastric?

A

Vc motor root - via nerve to mylohyoid (branch of IAN)

39
Q

what are the hyoid stabalisers?

A

infrahyoids
posterior digastric
stylohyoid

40
Q

what are the infrahyoids?

A

omohyoid
thyrohyoid
sternohyoid

41
Q

what are other muscles involved in mastication?

A

orbicularis oris (oral sphincter)
buccinator (along with the tongue)

Module 4 - mastication and Occlusion (8 decks)

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