Muscles: Facial Expression Flashcards Preview

Y Anatomy I > Muscles: Facial Expression > Flashcards

Flashcards in Muscles: Facial Expression Deck (27)
Loading flashcards...
1

Galea Aponeurotica

aka epicranial aponeurosis

2

Occipitofrontalis

frontal belly

- raises eyebrows, wrinkles forehead

3

Occipitofrontalis

- occipital belly

- draws back scalp

4

What is the cut and reflected muscle shown here?

Temporoparietalis

COURSE:

- galea aponeurotica > auricular cartilage

ACTION:

- assists frontal belly of occipitofrontalis

- tenses temporal fascia

- assists auricular muscles

5

What is the highlighted muscle?

Its 3 parts?

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

 

6

Corrugator Supercilii

COURSE:

- glabella + supraorbital margin > eyebrow skin

(penetrates orb. oculi and occ.frontalis)

ACTION:

- wrinkles forehead

7

#9

Procerus

COURSE:

- fascia over nose > skin just above glabella

ACTION:

- frowning (draws down medial angle of eyebrow)

8

10 and 11

two parts of one muscle

Nasalis

10. transverse (compressor naris) - compresses nostrils

  • above/lateral to incisive fossa > aponeurosis on bridge of nose

11. alar (dilator nasalis) - dilates nostrils

  • maxilla over lateral incisor > greater alar cartilage

9

#12

Levator Labii Superioris Alaeque Nasi

COURSE:

- nasal bone > nostril and upper lip

ACTION:

- dilate nostril

- elevate upper lip and wing of nose

10

#1

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

11

#2

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

12

#4

Zygomaticus Major

COURSE:

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

ACTION:

- draws angle of mouth up and lateral

- laughter/pleasure

13

#5

zygomaticus minor

COURSE:

- zygomatic > nasolabial groove

ACTION:

- elevates upper lip

14

#6

risorius

COURSE:

- masseteric fascia > angle of mouth (modiolus)

ACTION:

- draws angle of mouth back

- laughing, expression of "action"

- AKA laughing muscles

15

#7

levator labii superioris

COURSE:

- infraorbital margin > skin of upper lip

ACTION:

- elevates upper lip

16

#8

Levator Anguli Oris

COURSE:

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

ACTION:

- elevates angle of mouth

- smile, self-confidence

17

#9

depressor anguli oris

COURSE:

- tubercle of mandible > modiolus

ACTION:

- depresses angle of mouth

- frowning, sadness

18

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

What is it part of?

transversus menti

- specialization of depressor anguli oris

19

#10

depressor labii inferioris

COURSE:

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

ACTION:

- depresses lower lip

- expression of perseverance

20

#11 (bottom)

mentalis

COURSE:

- alveolar jugum > chin (mental tubercle)

ACTION:

- elevates chin, wrinkles skin

- protrudes lower lip

- expression of doubt and indecision

21

#12

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

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

mimetic muscles

23

What are ALL mimetic muscles innervated by?

facial nerve (CN VII)

24

What are the mimetic muscles of the scalp?

  1. Occipitofrontalis
  2. Temporoparietalis

25

What are the mimetic muscles of the eye?

  1. Orbicularis Oculi
  2. Corrugator Supercilii

26

What are the mimetic muscles of the nose?

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

27

What are the mimetic muscles of the mouth?

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