3.4 Muscles of Facial Expression Flashcards Preview

Gross Anatomy > 3.4 Muscles of Facial Expression > Flashcards

Flashcards in 3.4 Muscles of Facial Expression Deck (42):
1

Raises eyebrows and wrinkles forehead

frontalis m.

2

retracts scalp

occipitals m.

3

Closes eyelids

orbicularis oculi

4

Pulls eyebrows medially and inferiorly; creates horizontal wrinkle across bridge of nose

procerus

5

Pulls eyebrows medially; creases multiple vertical wrinkles along medial aspects of supra-orbital margin

Corrugator supercilli m.

6

Flares nostrils

nasalis m.

7

closes mouth, compresses lips against teeth and produces protrusion of kips (kissing)

orbicularis oris

8

elevates corner of the mouth (bilaterally = smiling, unilaterally = sneering); dilates mouth

zygomaticus major

9

Dilates mouth and raises upper lip

zygomaticus minor

10

dilates mouth and lifts the angle of the mouth

levator anguli oris

11

retracts (elevate) upper lip; dilates mouth

levator labii superioris

12

Pulls angles of mouth inferiorly

depressor angel oris

13

depresses lower lip

depressor labi inferioris

14

Elevates and protrudes lower lip (pouting)

mentalis

15

What is the origin of the buccinator muscle?

pterygomandibular raphe

16

Presses check against teeth (keeps food between occlusal surfaces of teeth), resists forces when blowing, whistling, or sucking

buccinator

17

depresses mandible (against resistance), tenses skin over neck and lower face

platysma

18

What gives sensory innervation to the face and scalp?

  • Cervical Plexus 
  • CN V

19

What gives motor innervation to the face and scalp?

CN VII 

20

What gives sensory innervation to the skin over parotid region, and parotid sheath?

Great auricular n. (branches from cervical plexus)

21

What gives sensory innervation to the scalp posterior to auricle?

Lesser occipital n. (branches from the cervical plexus) 

22

What gives sensory innervation to the post. ramus of C2, and the scalp over the occipital region?

Greater occipital n. (branch of the cervical plexus)

23

What gives sensory innervation to the lateral forehead?

Supra-orbital n. 

  • Branches from CN V1, off of frontal n. in orbit

 

24

What gives sensory innervation to the medial forehead?

Supratrochlear n. 

  • Branches from CN V1, off of frontal n. in orbit

25

What supplies sensory innervation to:

  • Skin over medial cheek
  • Lateral nose
  • Upper lip
  • Inferior eyelid

 

Infra-orbital n. 

  • Branches from CN V2, through infra-orbital foramen

26

What supplies sensory innervation to the skin over the prominence of the cheek? 

Zygomaticofacial n. 

  • Branch of CN V2, off of the zygomatic n. 

27

What supplies sensory innervation to the skin anterior to temporal fossa?

Zygomaticotemporal n. 

  • Branch of CN V2, from zygomatic n. 

28

What supplies sensory innervation to the skin anterior to auricle and posterior 2/3 of temporal region?

Auriculotemporal n. 

  • Branch from CN V3
  • Travels posterior to neck of mandible to then emerge and travel with superficial temporal vessels 

29

What supplies sensory innervation to the skin and oral mucosa of cheek, and buccal gingiva of mandibular molars?

(Long) buccal n. 

  • Branch of CN V3

30

What supplies sensory innervation to the skin and oral mucosa of lower lip?

Mental n.

  • Branch of CN V3
  • Emerges via mental foramen

31

Where does CN VII emerge from and what are the fibers? 

Stylomastoid foramen

Somatic motor and somatic sensory fibers only

32

What does CN VII pass through and break up into its 5 terminal branches?

Parotid Gland

33

What structures travel within the Parotid Gland?

  • CN VII does not innervate it
  • External Carotid Artery 
  • Retromandibular Vein 

34

The parotid duct exits anterior aspect of the gland ... to the zygomatic arch? 

inferior

35

The parotid duct passes superficial to the ...

masseter muscle

36

What muscle does the parotid duct pierce?

buccinator

37

Where does the parotid duct open?

opposite 2nd maxillary molar

38

What gives parasympathetic innervation to the parotid gland?

CN IX - lesser petrosal n. 

39

Where do the preganglionic parasympathetic fibers of the lesser petrosal n. (CN IX) synapse? 

Otic Ganglion

40

The postganglionic fibers of the lesser petrosal n. (CN IX) hitch a ride on what nerve? 

Auriculotemporal n. (CN V3)

41

The post-ganglionic sympatic fibers that innervate the Parotid Gland travel as a plexus on branches of ...

ECA

42

What gives innervation to the parotid sheath? 

Great auricular n.