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Gross Anatomy > 3.4 Muscles of Facial Expression > Flashcards

3.4 Muscles of Facial Expression Flashcards

1
Q

Raises eyebrows and wrinkles forehead

A

frontalis m.

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2
Q

retracts scalp

A

occipitals m.

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3
Q

Closes eyelids

A

orbicularis oculi

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4
Q

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

A

procerus

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5
Q

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

A

Corrugator supercilli m.

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6
Q

Flares nostrils

A

nasalis m.

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7
Q

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

A

orbicularis oris

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8
Q

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

A

zygomaticus major

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9
Q

Dilates mouth and raises upper lip

A

zygomaticus minor

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10
Q

dilates mouth and lifts the angle of the mouth

A

levator anguli oris

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11
Q

retracts (elevate) upper lip; dilates mouth

A

levator labii superioris

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12
Q

Pulls angles of mouth inferiorly

A

depressor angel oris

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13
Q

depresses lower lip

A

depressor labi inferioris

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14
Q

Elevates and protrudes lower lip (pouting)

A

mentalis

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15
Q

What is the origin of the buccinator muscle?

A

pterygomandibular raphe

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16
Q

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

A

buccinator

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17
Q

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

A

platysma

18
Q

What gives sensory innervation to the face and scalp?

A
  • Cervical Plexus
  • CN V
19
Q

What gives motor innervation to the face and scalp?

A

CN VII

20
Q

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

A

Great auricular n. (branches from cervical plexus)

21
Q

What gives sensory innervation to the scalp posterior to auricle?

A

Lesser occipital n. (branches from the cervical plexus)

22
Q

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

A

Greater occipital n. (branch of the cervical plexus)

23
Q

What gives sensory innervation to the lateral forehead?

A

Supra-orbital n.

  • Branches from CN V1, off of frontal n. in orbit
24
Q

What gives sensory innervation to the medial forehead?

A

Supratrochlear n.

  • Branches from CN V1, off of frontal n. in orbit
25
Q

What supplies sensory innervation to:

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

Infra-orbital n.

  • Branches from CN V2, through infra-orbital foramen
26
Q

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

A

Zygomaticofacial n.

  • Branch of CN V2, off of the zygomatic n.
27
Q

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

A

Zygomaticotemporal n.

  • Branch of CN V2, from zygomatic n.
28
Q

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

A

Auriculotemporal n.

  • Branch from CN V3
  • Travels posterior to neck of mandible to then emerge and travel with superficial temporal vessels
29
Q

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

A

(Long) buccal n.

  • Branch of CN V3
30
Q

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

A

Mental n.

  • Branch of CN V3
  • Emerges via mental foramen
31
Q

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

A

Stylomastoid foramen

Somatic motor and somatic sensory fibers only

32
Q

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

A

Parotid Gland

33
Q

What structures travel within the Parotid Gland?

A
  • CN VII does not innervate it
  • External Carotid Artery
  • Retromandibular Vein
34
Q

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

A

inferior

35
Q

The parotid duct passes superficial to the …

A

masseter muscle

36
Q

What muscle does the parotid duct pierce?

A

buccinator

37
Q

Where does the parotid duct open?

A

opposite 2nd maxillary molar

38
Q

What gives parasympathetic innervation to the parotid gland?

A

CN IX - lesser petrosal n.

39
Q

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

A

Otic Ganglion

40
Q

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

A

Auriculotemporal n. (CN V3)

41
Q

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

A

ECA

42
Q

What gives innervation to the parotid sheath?

A

Great auricular n.

Gross Anatomy (25 decks)

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