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Oral Anatomy > Muscles of Facial Expression > Flashcards

Muscles of Facial Expression Flashcards

1
Q

Muscle of facial expression blood supply

A

Usually facial artery

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2
Q

What cranial nerve is the facial nerve?

A

Cranial nerve 7

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3
Q

Are the muscles of facial expression paired or not paired?

A

Paired

Facial expressions usually work together

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4
Q

Epicranius frontal belly
Origin-
Insertion-

A

Origin-Epicracial aponeurosis

Insertion- eyebrow and root of nose

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5
Q

Epicranius occipital belly
origin-
insertion-

A

Origin-Occipital and temporal bones

Insertion-epicranial aponeurosis

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6
Q

Epicranius action

A

Raises eyebrows and scalp

Surprised look

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7
Q

Orbicularis oculi orbital portion
Origin
Insertion

A

Origin-orbital rim

Insertion- skin lateral to eye

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8
Q

Orbicularis oculi palpebral portion
Origin-
Insertion-

A

Origin-medial and lateral corners of eye

Insertion-shared with origin

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9
Q

Orbicularis oculi

Action

A

Closes the eye, Squinting, eyelid, working more of orbital

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10
Q

Circles the eyes

A

Orbicularis oculi

Eye optic

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11
Q

Makes up our eyebrow muscles

A

Corrugator

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12
Q

Corrugator supercilii
Origin
Insertion

A

Origin-frontal bone

Insertion-skin lateral to eyebrow

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13
Q

Corrugator supercilii action

A

Moves skin of eyebrow medial and inferior, vertical wrinkles on forehead, lowers eyebrow.
*furrows the brow

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14
Q

Procerus
Origin-
Insertion-

A

Origin- nasal bone

Insertion- skin of forehead

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15
Q

Procerus action

A

Horizontal wrinkles between the eyebrows, wrinkles in between eyebrows

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16
Q

Levator labii superioris alaque nasi

Action-

A

“Elevate lip upper angle nose”

Flaring of nostrils(nares), raise upper lip and angle of nose

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17
Q

Lavator labii superioris alaque nasi
Origin-
Insertion-

A

Origin-frontal process of maxilla

Insertion-skin at ala of nose, upper lip

18
Q

Levator labii superioris
Origin-
Insertion-

A

Origin-infraorbital rim

Insertion-skin of upper lip

19
Q

Lavator labii superioris action

A

Elevates the upper lip

20
Q

Zymomaticus major
Origin
Insertion

A

Origin- zygomatic bone

Insertion- skin at angle of mouth, corner of mouth

21
Q

Zygomaticus major action

A

Pulls angle of mouth superiorly and laterly, pulls smile up and to side

22
Q

zygomaticus minor
Origin
Insertion

A

O:just medial to zygomaticus major
I: skin of the upper lip, just lateral to levetor labii superioris

23
Q

Zygomaticus minor action

A

Pulls angle of mouth superior (and lateral)

Smile muscle

24
Q

Levator anguli oris
O:
I:

A

O: canine fossa of maxilla
I: skin at the angle of the mouth

25
Q

Levator anguli oris

Action

A

Pulls angle of mouth superior and lateral

Cranial 7 and facial nerve

Deep muscle (under, behind)

26
Q

Risorius
O:
I:

A

O: superficial fascia of masseter
I: skin at angle of mouth

27
Q

Risorius action

A

Widens the mouth, pulls smile out

Cranial nerve 7, facial artery

28
Q

Buccinator

3 origins

A

Fibrous-pterygoidansibular raphe (extends from hamulus and goes into myohyloid ridge)

2 bony- by cal alveolar bone, maxilla, and mandible (molar region)

29
Q

Buccinator insertion

A

Skin at angle of mouth

30
Q

Buccinator actions

A

Pulls angle of mouth laterally, shortens cheek vertically, shortens cheek horizontally, puffs out cheeks

Ex: blow up balloons play instrument

31
Q

What muscle is an accessory muscle of mastication and helps keep food on teeth

A

Buccinator

32
Q

Orbicularis oris

O and I:

A

Skin surrounding the mouth, some insertions at philtrum and angle of mouth.

Philtrum-area below nasal septum

33
Q

Orbicularis oris action

A

Closes the lips, puckers the lips

*muscle around mouth

34
Q

Depressor anguli oris

Action

A

Depresses angle of mouth
Ex: frowning
Lower angle of mouth, bring down mouth, lower corners of mouth

35
Q

Depressor anguli oris
O:
I:

A

O: lower border of mandible
I: skin at angle of mouth

36
Q

Depressor labii inferioris action

A

Depress lower lip, exposes lower teeth,

37
Q

Insertions go towards…

A

Origins

38
Q

Mentalis
O:
I:

A

O: near midline of mandible
I: skin of chin

39
Q

Mentalis action

A

Elevates skin at chin which will protrude lower lip, pushes out lower lip
Ex: pouting
2 small balls of muscle

40
Q

Platysma
O:
I:

A

O: skin superficial to clavicle/shoulder
I: inferior border of mandible

41
Q

Platysma action

A

Raises skin of neck and pulls down corners of mouth, neck tightens up
*very thin and superficial

42
Q

All muscles of mastication and facial muscles use what nerve

A

Cranial nerve 7

Oral Anatomy (16 decks)

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