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Y Anatomy I > Muscles: Facial Expression > Flashcards

Muscles: Facial Expression Flashcards

1
Q
A

Galea Aponeurotica

aka epicranial aponeurosis

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2
Q
A

Occipitofrontalis

frontal belly

  • raises eyebrows, wrinkles forehead
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3
Q
A

Occipitofrontalis

  • occipital belly
  • draws back scalp
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4
Q

What is the cut and reflected muscle shown here?

A

Temporoparietalis

COURSE:

  • galea aponeurotica > auricular cartilage

ACTION:

  • assists frontal belly of occipitofrontalis
  • tenses temporal fascia
  • assists auricular muscles
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5
Q

What is the highlighted muscle?

Its 3 parts?

A

Orbicularis Oculi

PARTS:

  1. orbital (surrounding eyelid)
  2. palpebral (eyelid)
  3. lacrimal (AKA Horner’s) (deep, medial, crossed fibers attached to posterior lacrimal crest)

COURSE:

  1. orbital: circularly around eye, attached to palebral ligament medially
  2. palpebral: circularly on eyelid, attached to palp. lig.
  3. lacrimal: post. lacrimal crest > orbital and palpebral parts

ACTION:

  • closes eyelids
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6
Q
A

Corrugator Supercilii

COURSE:

  • glabella + supraorbital margin > eyebrow skin

(penetrates orb. oculi and occ.frontalis)

ACTION:

  • wrinkles forehead
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7
Q

9

A

Procerus

COURSE:

  • fascia over nose > skin just above glabella

ACTION:

  • frowning (draws down medial angle of eyebrow)
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8
Q

10 and 11

two parts of one muscle

A

Nasalis

  1. transverse (compressor naris) - compresses nostrils
    * above/lateral to incisive fossa > aponeurosis on bridge of nose
  2. alar (dilator nasalis) - dilates nostrils
    * maxilla over lateral incisor > greater alar cartilage
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9
Q

12

A

Levator Labii Superioris Alaeque Nasi

COURSE:

  • nasal bone > nostril and upper lip

ACTION:

  • dilate nostril
  • elevate upper lip and wing of nose
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10
Q

1

A

orbicularis oris

  • not a simple sphincter, has multiple parts with fibers in different directions

COURSE:

  • maxilla & mandible > skin around the lips

ACTION:

  • closes mouth and puckers lips
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11
Q

2

A

buccinator

COURSE:

  • molar alveolar processes & pterygomandibular raphe (3) > angle of mouth

(forms lateral wall of oral vestibule)

ACTION:

  • compresses cheeks against teeth
  • assists mastication and suckling (neonates)
  • blowing, laughing, crying, expresses satisfaction
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12
Q

4

A

Zygomaticus Major

COURSE:

  • anterior zygomatic > modiolus (chiasma of mouth muscles at corners of mouth)

ACTION:

  • draws angle of mouth up and lateral
  • laughter/pleasure
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13
Q

5

A

zygomaticus minor

COURSE:

  • zygomatic > nasolabial groove

ACTION:

  • elevates upper lip
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14
Q

6

A

risorius

COURSE:

  • masseteric fascia > angle of mouth (modiolus)

ACTION:

  • draws angle of mouth back
  • laughing, expression of “action”
  • AKA laughing muscles
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15
Q

7

A

levator labii superioris

COURSE:

  • infraorbital margin > skin of upper lip

ACTION:

  • elevates upper lip
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16
Q

8

A

Levator Anguli Oris

COURSE:

  • maxilla (below inf.orb. foramen) > modiolus

ACTION:

  • elevates angle of mouth
  • smile, self-confidence
17
Q

9

A

depressor anguli oris

COURSE:

  • tubercle of mandible > modiolus

ACTION:

  • depresses angle of mouth
  • frowning, sadness
18
Q

What special muscle can be responsible for the formation of a double chin?

What is it part of?

A

transversus menti

  • specialization of depressor anguli oris
19
Q

10

A

depressor labii inferioris

COURSE:

  • oblique line of mandible > skin of lower lip, orb. oris fibers

ACTION:

  • depresses lower lip
  • expression of perseverance
20
Q

11 (bottom)

A

mentalis

COURSE:

  • alveolar jugum > chin (mental tubercle)

ACTION:

  • elevates chin, wrinkles skin
  • protrudes lower lip
  • expression of doubt and indecision
21
Q

12

A

platysma

COURSE:

  • skin of neck (supra/infraclavicular regions) > facial region (cheek, mandible, modiolus, orb. oris)

ACTION:

  • draws corners of mouth down, widens mouth
  • expressions of fright or sadness
22
Q

What are the muscles of facial expression called as a whole?

A

mimetic muscles

23
Q

What are ALL mimetic muscles innervated by?

A

facial nerve (CN VII)

24
Q

What are the mimetic muscles of the scalp?

A
  1. Occipitofrontalis
  2. Temporoparietalis
25
Q

What are the mimetic muscles of the eye?

A
  1. Orbicularis Oculi
  2. Corrugator Supercilii
26
Q

What are the mimetic muscles of the nose?

A
  1. Procerus
  2. Nasalis (transerve and alar)
  3. Levator Labii Superioris Alaeque Nasi
27
Q

What are the mimetic muscles of the mouth?

A

OOB2ZRLLDDMP

Ooh Boy 2 Zebras Really Like Licking Dandelions Down My Pants

  1. Orbicularis Oculi
  2. Buccinator
  3. Zygomaticus Major
  4. Zygomatics Minor
  5. Risorius
  6. Levator Labii Superioris
  7. Levator Anguli Oris
  8. Depressor Anguli Oris
  9. Depressor Labii Inferioris
  10. Mentalis
  11. Platysma

Y Anatomy I (18 decks)

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