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2 Anatomy > Muscles Of Mastication > Flashcards

Muscles Of Mastication Flashcards

1
Q

Name this structure

A

Glenoid fossa

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2
Q

Name this structure

A

Articular eminence

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3
Q

Name this structure

A

Condyle

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4
Q

Name this bone

A

Zygomatic bone

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5
Q

Name this bone

A

Temporal bone

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6
Q

What are the 3 groups of movements for muscles involved in mastication?

A

Between skull and mandible
Between mandible and hyoid
Hyoid stabilisers

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7
Q

Which group of muscles is blue?

A

Between skull and mandible

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8
Q

Which group of muscles is purple?

A

Hyoid stabilisers

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9
Q

Which group of muscles is green?

A

Between mandible and hyoid

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10
Q

What are the 4 muscles between the skull and mandible?

A

Masseter
Temporalis
Medial Pterygoid
Lateral Pterygoid

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11
Q

Name this muscle

A

Superficial Masseter

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12
Q

Where is the origin of the superficial Masseter?

A

Zygomatic arch/bone

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13
Q

Where is the insertion of the superficial Masseter?

A

Angle/ramus of mandible

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14
Q

What are the actions of the Masseter? 3

A

Closes jaw
Assists protrusion
Assists lateral movement

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15
Q

The superficial Masseter is innervated by which nerve?

A

CN V3
Masseteric nerve

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16
Q

Name this muscle

A

Deep Masseter

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17
Q

Where is the origin of the deep Masseter?

A

Inner aspect of zygomatic arch

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18
Q

Where is the insertion of the deep Masseter ?

A

Angle/ramus of mandible

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19
Q

The deep Masseter is innervated by which nerve?

A

CNV3
Masseteric nerve

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20
Q

Name this muscle

A

Temporalis

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21
Q

Where is the origin of Temporalis?

A

Inferior temporal line and fascia

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22
Q

Where is the insertion of Temporalis?

A

Coronoid process

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23
Q

What r the actions of Temporalis? 3

A

Jaw elevation
Retrusion
Assists lateral movement

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24
Q

Temporalis is innervated by which nerve?

A

CN V3
Deep temporal nerve

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25
Q

Name this muscle

A

Lateral Pterygoid

26
Q

What are the two parts of the lateral Pterygoid?

A

Upper head
Lower head

27
Q

Where is the upper head of the lateral Pterygoids origin?

A

Infratemporal surface of greater wing of sphenoid

28
Q

Where is the upper head of the lateral Pterygoids insertion?

A

Capsule and articular disc of TMJ

29
Q

Where is the lower head of the lateral Pterygoids origin?

A

Lateral aspect of lateral Pterygoid plate

30
Q

Where is the lower head of the lateral Pterygoids insertion?

A

Pterygoid fovea below head of condyle

31
Q

What is the function of the lateral pterygoid? 3

A

Assists during wide opening
Protrusion
Lateral excursion

32
Q

Which nerve innervates the lateral Pterygoid muscles

A

CN V3
Motor root nerve to lateral Pterygoid

33
Q

Name this muscle

A

Medial Pterygoid

34
Q

What r the origins of the medial Pterygoid?

A

Medial aspect of lateral Pterygoid plate

Maxillary tuberosity

35
Q

Where is the insertion of the medial Pterygoid?

A

Medial aspect of ramus/angle of mandible

36
Q

What are the 3 actions of the medial Pterygoid?

A

Jaw elevation
Protrusion
Lateral excursions

37
Q

Which nerve innervates the medial Pterygoid?

A

CN V3
Motor root nerve to medial Pterygoid

38
Q

What are the three muscles between the mandible and hyoid?

A

Geniohyoid
Mylohyoid
Digastric (anterior)

39
Q

Name this muscle

A

Geniohyoid

40
Q

Where is the origin of Geniohyoid? 2

A

Inferior mental spine
Inferior genial tubercle

41
Q

Where is the insertion of the Geniohyoid?

A

Hyoid bone

42
Q

What is the action of the Geniohyoid? 3

A

Jaw opening
Retrusion
Raise the hyoid

43
Q

What is the innervation of the Geniohyoid?

A

C1 with Hypoglossal CNXII

44
Q

Name this muscle

A

Mylohyoid

45
Q

Name this structure

A

Median raphe

46
Q

What is the action of the Mylohyoid? 3

A

Jaw opening
Raise hyoid
Raise floor of mouth

47
Q

What is the innervation to the Mylohyoid?

A

CN V3
Branch of inferior alveolar nerve to Mylohyoid

48
Q

Name this muscle

A

Anterior belly of digastric

49
Q

Name this structure

A

Intermediate tendon

50
Q

Name this structure

A

Fibrous loop

51
Q

Where is the origin of the anterior belly of digastric

A

Digastric fossa

52
Q

What is the action of the anterior belly of Digastric?

A

Jaw opening
Retrusion
Raise hyoid bone

53
Q

What is the innervation to the anterior belly of Digastric?

A

CN V3
Branch of inferior alveolar nerve to Mylohyoid

54
Q

What are the three hyoid stabiliser muscles?

A

Infrahyoids
Posterior Digastric
Stylohyoid

55
Q

What are the three infrahyoid muscles?

A

Thyrohyoid
Omohyoid
Sternohyoid

56
Q

Name this muscle

A

Stylohyoid

57
Q

Name this muscle

A

Posterior belly of Digastric

58
Q

Name this muscle

A

Omohyoid

59
Q

Name this muscle

A

Sternohyoid

60
Q

Name this muscle

A

Thyrohyoid

2 Anatomy (7 decks)

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