Craniofacial muscles

Question 1

Buccinator attachments

Answer 1

from alveolar processes of the maxilla and mandible, pterygoid hamulus and pterygomandibular raphe to angle of mouth

Question 2

Action of buccinator

Answer 2

compresses cheek (when blowing)

Question 3

Buccinator innervation

Answer 3

buccal branch of facial nerve

Question 4

Depressor anguli oris attachments

Answer 4

from mandible to angle of mouth

Question 5

Actions of depressor anguli oris

Answer 5

depresses angle of mouth laterally (frown, sadness)

Question 6

Depressor anguli oris innervation

Answer 6

buccal and mandibular branch of the facial nerve

Question 7

Depressor labii inferioris attachments

Answer 7

from oblique line of mandible to skin of lower lip

Question 8

Action of depressor labii inferioris

Answer 8

depresses lower lip (pouting, sadness)

Question 9

Depressor labii inferioris innervation

Answer 9

mandibular branch of the facial nerve

Question 10

Frontalis attachments

Answer 10

from the superficial fascia of the eyebrows to the epicranial aponeurosis

Question 11

Action of frontalis

Answer 11

protracts the scalp or elevates eyebrows and nose (surprise or curiosity)

Question 12

Frontalis innervation

Answer 12

temporal branch of the facial nerve

Question 13

Levator labii superioris attachments

Answer 13

from the inferior orbital margin to the lateral aspect of the upper lip

Question 14

Action of levator labii superioris

Answer 14

raises and everts upper lip (showing sadness)

Question 15

Levator labii superioris innervation

Answer 15

buccal and zygomatic branches of the facial nerve

Question 16

Nasalis attachments

Answer 16

from the maxilla lateral and inferior to the nasal notch to the bridge and ala of the nose

Question 17

Action of nasalis

Answer 17

transverse fibers compress and alar fibers widen the nasal aperture (flaring nostrils during anger or exertion)

Question 18

Nasalis innervation

Answer 18

buccal branch of facial nerve

Question 19

Orbicularis oculi attachments

Answer 19

from orbital margin and medial palpebral ligament to superficial fascia of the eyelid

Question 20

Action of orbicularis oculi

Answer 20

a palpebral sphincter (closes eyes, winking)

Question 21

Orbicularis oculi innervation

Answer 21

temporal and zygomatic branches of the facial nerve

Question 22

Orbicularis oris attachments

Answer 22

from angle of mouth to the superficial fascia of the upper lip

Question 23

Action of orbicularis oris

Answer 23

an oral sphincter (closes mouth, kissing)

Question 24

Orbicularis oris innervation

Answer 24

buccal and mandibular branches of the facial nerve

Question 25

Platysma attachments

Answer 25

from the lower border of the mandible to the superficial fascia of the skin of the neck overlying the clavicle

Question 26

Action of platysma

Answer 26

wrinkles the anterior nuchal skin (conveying tension or stress)

Question 27

Platysma innervation

Answer 27

cervical branch of the facial nerve

Question 28

Zygomaticus major attachments

Answer 28

from zygomatic bone to angle of mouth

Question 29

Action of zygomaticus major

Answer 29

raises angle of mouth (smiling, happiness)

Question 30

Zygomaticus major innervation

Answer 30

buccal and zygomatic branches of the facial nerve