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Anatomy > Facial Muscles > Flashcards

Facial Muscles Flashcards

1
Q

What is the Shape of Temporalis

A

Large, Broad & Fan Shaped

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2
Q

What is the Location of Temporalis

A

Squamous Region (Temporal Bone) & Inferior Aspect of the Parietal Bones

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3
Q

What is the Fibre Direction of the Temporalis

A

Multiple

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4
Q

What is the Origin of Temporalis

A

Temporal Fossa

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5
Q

What are the Insertions of Temporalis

A

Coronoid Process & Ramus of Mandible

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6
Q

What are the Actions of Temporalis

A
  • Elevates & Closes the Mandible (biting)

- Retrusion of Mandible

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7
Q

What is the Shape of the Masseter

A

Quadrangle with 2 Heads

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8
Q

What is the Location of the Masseter

A

Near the Angle of the Mandible

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9
Q

What is the Fibre Direction of the 2 Heads of the Masseter

A
  • Superficial Head: Inferoposterior

- Deep Head: Inferoanterior

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10
Q

What is the Origin of the Masseter

A

Both Heads: Zygomatic Arch

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11
Q

What are the Insertions of the Masseter

A
  • Superficial Head: Ramus of Mandible

- Deep Head: Coronoid Process & Ramus of Mandible

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12
Q

What are the Actions of both Heads of the Masseter

A
  • Superficial Head: Elevation & Protrusion of Mandible (chewing)
  • Deep Head: Elevation & Retrusion of the Mandible
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13
Q

What is the Shape of the Lateral Pterygoid

A

Short, with 2 Heads

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14
Q

What is the Location of the Lateral Pterygoid

A

Under the Zygomatic Arch & Coronoid Process

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15
Q

What is the Fibre Direction of the Lateral Pterygoid

A

Inferoposterior

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16
Q

What are the Origins of Both Heads of the Lateral Pterygoid

A
  • Superior Head: Greater Wing of Sphenoid

- Inferior Head: Lateral Aspect of Lateral Pterygoid Plate

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17
Q

What are the Insertions of Both Heads of the Lateral Pterygoid

A
  • Superior Head: TMJ Capsule & Articular Disc

- Inferior Head: Ramus of Mandible

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18
Q

What are the Actions of the Lateral Pterygoid

A

Both Heads together: Protrude & Depress the Jaw

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19
Q

What is the Shape of the Medial Pterygoid

A

Short, with 2 Heads

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20
Q

What is the Location of the Medial Pterygoid

A

Medial to the Mandible (internal surface)

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21
Q

What is the Fibre Direction of the Medial Pterygoid

A

Inferoposterior

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22
Q

What are the Origins of Both Heads of the Medial Pterygoid

A
  • Superficial Head: Posterior Aspect of Maxilla

- Deep Head: Medial Surface of Lateral Pterygoid

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23
Q

What is the Insertion of the Medial Pterygoid

A

Ramus of Mandible (Medial Aspect, Internal Surface)

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24
Q

What are the Actions of the Medial Pterygoid

A
  • Together: Elevate & Protrude the Mandible

- Alternately: Side-to-Side Grinding

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25
Q

What is the Shape of the Frontalis

A

Square

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26
Q

What is the Location of the Frontalis

A

Covers Forehead & Dome of Skull

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27
Q

What is the Fibre Direction of the Frontalis

A

Vertical

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28
Q

What is the Origin of the Frontalis

A

Aponeurotica

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29
Q

What are the Insertions of the Frontalis

A
  • Skin of Eyebrows

- Roof of Nose

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30
Q

What are the Actions of the Frontalis

A
  • Raise the Eyebrows
  • Wrinkle the Forehead
  • “Frowning Muscle”
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31
Q

What is the Shape of the Occipitalis

A

Square

32
Q

What is the Location of the Occipitalis

A

Covers the Inferior Occiput

33
Q

What is the Fibre Direction of the Occipitalis

A

Vertical

34
Q

What is the Origin of the Occipitalis

A

Lateral 2/3 of the Superior Nuchal Line

35
Q

What is the Insertion of the Occipitalis

A

Epicranial Aponeurosis

36
Q

What are the Actions of the Occipitalis

A
  • Retracts Scalp

- Increases Effectiveness of Frontalis

37
Q

What is the Shape of the Orbicularis Oculi

A

Round

38
Q

What is the Location of the Orbicularis Oculi

A

Around the Eye

39
Q

What is the Fibre Direction of the Orbicularis Oculi

A

Circular

40
Q

What are the Origins of the Orbicularis Oculi

A
  • Frontal Bone
  • Maxilla
  • Ligament around the Eye
41
Q

What is the Insertion of the Orbicularis Oculi

A

Eyelids

42
Q

What is the Action of the Orbicularis Oculi

A

Closes the Eyelids

“Squinting & Blinking Muscle”

43
Q

What is the Location of the Corrugator Supercilii

A

On Inferomedial Frontal Bone

44
Q

What is the Fibre Direction of the Corrugator Supercilii

A

Superolateral

45
Q

What is the Origin of the Corrugator Supercilii

A

Medial End of Superciliary Arch

46
Q

What are the Insertions of the Corrugator Supercilii

A
  • Skin of Supraorbital Margin

- Superciliary Arch

47
Q

What is the Action of the Corrugator Supercilii

A

Draws Eyebrows Medially & Inferiorly

“Frowning Muscle”

48
Q

What is the Shape of the Orbicularis Oris

A

Round

49
Q

What is the Location of the Orbicularis Oris

A

Around the Mouth

50
Q

What is the Fibre Direction of the Orbicularis Oris

A

Circular

51
Q

What are the Origins of the Orbicularis Oris

A
  • Indirectly from the Maxilla & Mandible

- Blends with Fibres of other Muscles

52
Q

What are the Insertions of the Orbicularis Oris

A

Muscle & Skin at the Corners of the Mouth

53
Q

What are the Actions of the Orbicularis Oris

A

Closes & Purses the Lips

“Kissing Muscle”

54
Q

What is the Shape of the Buccinator

A

Rectangular

55
Q

What is the Location of the Buccinator

A

Deep to Masseter

56
Q

What is the Fibre Direction of the Buccinator

A

Horizontal

57
Q

What are the Origins of the Buccinator

A

Maxilla & Mandible

58
Q

What is the Insertion of the Buccinator

A

Orbicularis Oris

59
Q

What is the Action of the Buccinator

A

Draws Mouth Laterally

“Whistling & Blowing Muscle”

60
Q

What is the Shape of the Zygomaticus

A

Pair of Long Muscles

61
Q

What is the Location of the Zygomaticus

A

Covers the Area from the Corner of the Mouth to the Cheekbone

62
Q

What is the Fibre Direction of the Zygomaticus

A

Superolateral

63
Q

What is the Origin of the Zygomaticus

A

Zygomatic Bone

64
Q

What are the Insertions of the Zygomaticus

A

Skin & Muscle at the Corners of the Mouth

65
Q

What is the Action of the Zygomaticus

A

Raises the Corners of the Mouth

“Smiling Muscle”

66
Q

Which Muscles Make up the Occipitofrontalis

A

Frontalis & Occipitalis

67
Q

What is the Innervation of Occipitalis

A

CN VII (facial nerve)

68
Q

What is the Innervation of Frontalis

A

CN VII (facial nerve)

69
Q

What is the Innervation of Zygomaticus

A

CN VII (Facial Nerve)

70
Q

What is the Innervation of Buccinator

A

CN VII (facial nerve)

71
Q

What is the Innervation of Orbicularis Oris

A

CN VII (facial nerve)

72
Q

What is the Innervation of Orbicularis Oculi

A

CN VII (facial nerve)

73
Q

What is the Innervation of Corrugator Supercilii

A

CN VII (facial nerve)

74
Q

What is the Innervation of Temporalis

A

CN V (Trigeminal nerve)

75
Q

What is the Innervation of Masseter

A

CN V (Trigeminal nerve)

76
Q

What is the Innervation of Lateral Pterygoid

A

CN V (Trigeminal nerve)

77
Q

What is the Innervation of Medial Pterygoid

A

CN V (Trigeminal nerve)

Anatomy (30 decks)

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