Muscles of facial expression

Question 1

Buccinator action

Answer 1

compresses cheeks

Question 2

Buccinator attachments

Answer 2

P: mandible, alveolar processes, and pterygomandibular raphe
D: angle of mouth with orbicularis oris fibers

Question 3

Corrugator supercilii action

Answer 3

draws eyebrows medially and inferiorly, creating vertical wrinkles

Question 4

Corrugator supercilii attachments

Answer 4

P: medial end of superciliary arch
D: skin superior to middle of supraorbital margin and superciliary arch

Question 5

Depressor anguli oris action

Answer 5

depresses corner of mouth

Question 6

Depressor anguli oris attachments

Answer 6

P: base of mandible
D: angle of mouth

Question 7

Depressor labii inferioris action

Answer 7

depresses lower lip

Question 8

Depressor labii inferioris attachments

Answer 8

P: platysma and anterolateral body of mandible
D: skin of lower lip

Question 9

Levator labii superioris action

Answer 9

elevates upper lip

Question 10

Levator labii superioris attachments

Answer 10

P: lower margin of orbit, superior to infraorbital foramen
D: orbicularis oris

Question 11

Levator anguli oris action

Answer 11

elevates corner of mouth

Question 12

Levator anguli oris attachments

Answer 12

P: infra-orbital maxilla
D: angle of mouth

Question 13

Levator labii superioris alaeque nasi action

Answer 13

elevates upper lip and dilates (flares) nostrils

Question 14

Levator labii superioris alaeque nasi attachments

Answer 14

P: frontal process of maxilla
D: major alar cartilage

Question 15

Mentalis action

Answer 15

elevates and protrudes lower lip

Question 16

Mentalis attachments

Answer 16

P: body of mandible
D: skin of chin

Question 17

Orbicularis oculi action

Answer 17

closes eyelids gently (palpebral part)/tightly (orbital part)

Question 18

Orbicularis oculi attachments

Answer 18

P: medial orbital margin, lacrimal bone
D: skin around eyelids

Question 19

Orbicularis oris action

Answer 19

compresses, purses lips

Question 20

Orbicularis oris attachments

Answer 20

P: maxillary bone and mandible, angle of mouth
D: mucous membranes of lips

Question 21

Risorius action

Answer 21

draws corner of mouth to side (to smile)

Question 22

Risorius attachments

Answer 22

P: fascia surrounding parotid salivary gland
D: angle of mouth

Question 23

Zygomaticus major action

Answer 23

raises corners of mouth–bilaterally to smile, unilaterally to sneer
muscle defect=dimples!

Question 24

Zygomaticus major attachments

Answer 24

P: lateral aspect of zygomatic bone
D: angle of mouth

Question 25

Zygomaticus minor action

Answer 25

draws upper lip backward, upward, and outward (sad facial expressions)

Question 26

Zygomaticus minor attachments

Answer 26

P: anterior aspect of zygomatic bone D: skin of upper lip

Question 27

Auricularis superior action

Answer 27

slightly raises ear

Question 28

Auricularis superior attachments

Answer 28

P: galea aponeurotica D: upper cranial surface of auricula

Question 29

Auricularis anterior action

Answer 29

draws auricula forward and upward

Question 30

Auricularis anterior attachments

Answer 30

P: lateral edge of galea aponeurotica D: front of helix of ear

Question 31

Auricularis posterior action

Answer 31

draws auricula backward

Question 32

Auricularis posterior attachments

Answer 32

P: mastoid portion of temporal bone D: lower part of cranial surface of auricle