Superficial Face

Question 1

The muscles of facial expression have a ______ origin but a ______ insertion.

Answer 1

bony; fascial

Question 2

What innervates the muscles of facial expression?

Answer 2

branches of CN VII

Question 3

What allows muscles of facial expression to act together in groups?

Answer 3

The fact that their fibers interlace (they act together to alter size/shape of orifices of the face).

Question 4

What is the difference b/t function of the outer portion of the orbicularis oculi and the palbebral portion of the orbicularis oculi?

Answer 4

• Outer: allows for squeezing eyes shut

- Palpebral: moves the eyelids (usually only upper eyelid moves)

Question 5

Function of platysma?

Answer 5

tenses skin of neck

Question 6

Function of frontalis muscle?

Answer 6

wrinkles forehead skin and raises eyebrows

Question 7

Innervation of frontalis?

Answer 7

temporal branches of CN VII

Question 8

Innervation of orbicularis oris?

Answer 8

zygomatic, buccal, and mandibular branches of facial nerve

Question 9

Function of buccinator?

Answer 9

compresses cheeks, expels air b/t lips, aids in mastication

Question 10

Innervation of buccinator?

Answer 10

buccal branches of facial nerve

Question 11

Function of zygomaticus major?

Answer 11

zygomatic and buccal branches of facial nerve

Question 12

Innervation of zygomaticus major?

Answer 12

draws angle of mouth backward and upward (smiling muscle)

Question 13

Innervation of platysma?

Answer 13

CN VII

Question 14

Function of orbicularis oris?

Answer 14

compression, contraction, and protrusion of lips

Question 15

Is buccinator a superficial or deep muscle of facial expression?

Answer 15

deep

Question 16

What are the main superficial muscles of facial expression that we discussed?

Answer 16

• Frontalis
• Orbicularis oculi
• Orbicularis oris
• Zygomaticus major
• Platysma

Question 17

Where does the facial nerve exit the cranium?

Answer 17

stylomastoid foramen

Question 18

Which nerve controls the motor innervation of facial expression, and which controls sensory innervation of the face?

Answer 18

• Motor: CN VII (facial)

- Sensory: CN V (trigeminal - 3 branches)

Question 19

What structure does the facial nerve pierce?

Answer 19

parotid gland

Question 20

Which structures pierce the parotid gland?

Answer 20

• Facial nerve
• External carotid artery
• Retromandibular vein

Question 21

What is the parotid gland innervated by?

Answer 21

Parasympathetic fibers from the glossopharyngeal nerve (IX), which synapse in otic ganglion and travel into auriculotemporal nerve as it passes through parotid gland.

Question 22

The parotid salivary gland secretes serous fluids via_______, which pierces______.

Answer 22

Stenson’s duct; buccinator

Question 23

Transverse facial artery runs close to what?

Answer 23

parotid duct and zygomatic branch of facial nerve

Question 24

Is the facial vein superficial or deep to the submandibular gland?

Answer 24

superficial

Question 25

Bacteria in the “danger triangle” can migrate to the cranium via which structure/vessel?

Answer 25

deep facial vein

Question 26

Is the facial artery superficial or deep to the submandibular gland?

Answer 26

deep