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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
What is the Shape of the Frontalis
Square
26
What is the Location of the Frontalis
Covers Forehead & Dome of Skull
27
What is the Fibre Direction of the Frontalis
Vertical
28
What is the Origin of the Frontalis
Aponeurotica
29
What are the Insertions of the Frontalis
- Skin of Eyebrows | - Roof of Nose
30
What are the Actions of the Frontalis
- Raise the Eyebrows - Wrinkle the Forehead - “Frowning Muscle”
31
What is the Shape of the Occipitalis
Square
32
What is the Location of the Occipitalis
Covers the Inferior Occiput
33
What is the Fibre Direction of the Occipitalis
Vertical
34
What is the Origin of the Occipitalis
Lateral 2/3 of the Superior Nuchal Line
35
What is the Insertion of the Occipitalis
Epicranial Aponeurosis
36
What are the Actions of the Occipitalis
- Retracts Scalp | - Increases Effectiveness of Frontalis
37
What is the Shape of the Orbicularis Oculi
Round
38
What is the Location of the Orbicularis Oculi
Around the Eye
39
What is the Fibre Direction of the Orbicularis Oculi
Circular
40
What are the Origins of the Orbicularis Oculi
- Frontal Bone - Maxilla - Ligament around the Eye
41
What is the Insertion of the Orbicularis Oculi
Eyelids
42
What is the Action of the Orbicularis Oculi
Closes the Eyelids | “Squinting & Blinking Muscle”
43
What is the Location of the Corrugator Supercilii
On Inferomedial Frontal Bone
44
What is the Fibre Direction of the Corrugator Supercilii
Superolateral
45
What is the Origin of the Corrugator Supercilii
Medial End of Superciliary Arch
46
What are the Insertions of the Corrugator Supercilii
- Skin of Supraorbital Margin | - Superciliary Arch
47
What is the Action of the Corrugator Supercilii
Draws Eyebrows Medially & Inferiorly | “Frowning Muscle”
48
What is the Shape of the Orbicularis Oris
Round
49
What is the Location of the Orbicularis Oris
Around the Mouth
50
What is the Fibre Direction of the Orbicularis Oris
Circular
51
What are the Origins of the Orbicularis Oris
- Indirectly from the Maxilla & Mandible | - Blends with Fibres of other Muscles
52
What are the Insertions of the Orbicularis Oris
Muscle & Skin at the Corners of the Mouth
53
What are the Actions of the Orbicularis Oris
Closes & Purses the Lips | “Kissing Muscle”
54
What is the Shape of the Buccinator
Rectangular
55
What is the Location of the Buccinator
Deep to Masseter
56
What is the Fibre Direction of the Buccinator
Horizontal
57
What are the Origins of the Buccinator
Maxilla & Mandible
58
What is the Insertion of the Buccinator
Orbicularis Oris
59
What is the Action of the Buccinator
Draws Mouth Laterally | “Whistling & Blowing Muscle”
60
What is the Shape of the Zygomaticus
Pair of Long Muscles
61
What is the Location of the Zygomaticus
Covers the Area from the Corner of the Mouth to the Cheekbone
62
What is the Fibre Direction of the Zygomaticus
Superolateral
63
What is the Origin of the Zygomaticus
Zygomatic Bone
64
What are the Insertions of the Zygomaticus
Skin & Muscle at the Corners of the Mouth
65
What is the Action of the Zygomaticus
Raises the Corners of the Mouth | “Smiling Muscle”
66
Which Muscles Make up the Occipitofrontalis
Frontalis & Occipitalis
67
What is the Innervation of Occipitalis
CN VII (facial nerve)
68
What is the Innervation of Frontalis
CN VII (facial nerve)
69
What is the Innervation of Zygomaticus
CN VII (Facial Nerve)
70
What is the Innervation of Buccinator
CN VII (facial nerve)
71
What is the Innervation of Orbicularis Oris
CN VII (facial nerve)
72
What is the Innervation of Orbicularis Oculi
CN VII (facial nerve)
73
What is the Innervation of Corrugator Supercilii
CN VII (facial nerve)
74
What is the Innervation of Temporalis
CN V (Trigeminal nerve)
75
What is the Innervation of Masseter
CN V (Trigeminal nerve)
76
What is the Innervation of Lateral Pterygoid
CN V (Trigeminal nerve)
77
What is the Innervation of Medial Pterygoid
CN V (Trigeminal nerve)

Anatomy (30 decks)

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