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ANAT1119 - Orofacial Anatomy I > CH30 - Muscles of Facial Expression > Flashcards

CH30 - Muscles of Facial Expression Flashcards

Week 10

1
Q

Muscles of the ears, scalp, neck, eyes, nose, & mouth are all innervated by

A

7th cranial nerve

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2
Q

Occipitofrontalis (Epicranius)

A

Scalp muscle

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3
Q

Platysma

A

Neck muscle

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4
Q

Groups of fibers in front and back connected by a broad flat band of fascia

A

Occipitofrontalis

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5
Q

Fibers pass down in a broad flat sheet ending in the skin of the chest just below the
clavicle

A

Platysma

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6
Q

What are the 2 eye muscles?

A
  • Orbicularis oculi
  • Corrugator
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7
Q

What are the 2 nose muscles?

A
  • Dilator naris
  • Compressor naris
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8
Q

What are the muscles of the mouth (BOMZ)

A
  • Buccinator
  • Orbicularis oris
  • Mentalis
  • Zygomaticus major
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9
Q

What are the muscles of the mouth (RDDLLZ)

A
  • Risorisus
  • Depressor labii inferioris
  • Depressor angluli oris
  • Levator labii superioris
  • Levator anguli oris
  • Zygomaticus minor
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10
Q

What is the action of the orbicularis oris?

A

Closes/compresses lips

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11
Q

What is the origin of the orbicularis oris?

A

Anterior nasal spine

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12
Q

Where is the insertion of the orbicularis oris?

A

Skin of lips

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13
Q

What is the action of the levator labii superioris?

A

Elevates the upper lip

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14
Q

What is the origin of the levator labii superioris?

A

Lower rim of the orbit

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15
Q

Where is the insertion of the levator labii superioris?

A

Orbicularis oris

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16
Q

What is the action of the zygomaticus minor?

A

Raises upper lip

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17
Q

What is the origin of the zygomaticus minor?

A

Zygomatic bone

18
Q

Where is the insertion of the zygomaticus minor?

A

Orbicularis oris; lateral to the levator labii superioris

19
Q

What is the action of the zygomaticus major?

A

Elevates the corners of the mouth (smile)

20
Q

What is the origin of of the zygomaticus major?

A

Zygomatic bone

21
Q

Where is the insertion of the zygomaticus major?

A

Into the orbicularis oris at the angle of the mouth

22
Q

What is the action of the levator anguli oris?

A

Pulls the angles of the mouth up & toward the midline

23
Q

What is the origin of the levator anguli oris?

A

Maxilla

24
Q

Where is the insertion of the levator anguli oris?

A

Orbicularis oris (commissures)

25
Q

What is the action of the depressor labii inferioris?

A

Pulls the lower lip down (pout)

26
Q

What is the origin of the depressor labii inferioris?

A

Inferior border of mandible

27
Q

Where is the insertion of the depressor labii inferioris?

A

Into the fibers of the orbicularis oris toward the middle of the lower lip

28
Q

What is the action of the depressor anguli oris?

A

Pulls the corners of the mouth down

29
Q

What is the origin of the depressor anguli oris?

A

Inferior border of mandible

30
Q

Where is the insertion of the depressor anguli oris?

A

Orbicularis oris at the angle of the mouth

31
Q

What is the action of the mentalis?

A

Pulls the skin up

32
Q

What is the origin of the mentalis?

A

Anterior surface of mandible

33
Q

Where is the insertion of the mentalis?

A

Skin of chin

34
Q

The most important muscle of the mouth; also plays role in mastication

A

Buccinator

35
Q

What is the action of the buccinator?

A

Pulls the corners of the mouth back & compresses the cheek

36
Q

What is the origin of the buccinator?

A

Pterygomandibular raphe

37
Q

Where is the insertion of the buccinator?

A

Orbicularis oris/corners of the mouth

38
Q

What is the action of the risorius?

A

Aids in smiling

39
Q

What is the origin of the risorius?

A

Angle of mandible

40
Q

Where is the insertion of the risorius?

A

Corner of mouth

ANAT1119 - Orofacial Anatomy I (8 decks)

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