Craniofacial Muscles

Question 1

Buccinator [L. bucca, cheek] - Attachments

Answer 1

FROM
*alveolar processes of the maxilla & mandible, pterygoid hamulus & pterygomandibular raphe

TO
*angle of mouth

Question 2

Buccinator [L. bucca, cheek] - Actions

Answer 2

compresses cheek (when blowing)

Question 3

Buccinator [L. bucca, cheek] - Innervation

Answer 3

buccal branch of the facial n.

Question 4

Depressor anguli oris - Attachments

Answer 4

FROM
*mandible

TO
*angle of mouth

Question 5

Depressor anguli oris - Actions

Answer 5

depresses angle of mouth laterally (frown, sadness)

Question 6

Depressor anguli oris - Innervation

Answer 6

buccal & mandibular branch of the facial n.

Question 7

Depressor labii inferioris - Attachments

Answer 7

FROM
*oblique line of mandible

TO
*skin of lower lip

Question 8

Depressor labii inferioris - Actions

Answer 8

depresses lower lip (pouting, sadness)

Question 9

Depressor labii inferioris - Innervation

Answer 9

mandibular branch of the facial n.

Question 10

Frontalis - Attachments

Answer 10

FROM
*superficial fascia of the eyebrows

TO
*epicranial aponeurosis

Question 11

Frontalis - Actions

Answer 11

*protracts the scalp

OR

*elevates eyebrows & nose (surprise or curiosity)

Question 12

Frontalis - Innervation

Answer 12

temporal branch of the facial n.

Question 13

Levator labii superioris - Attachments

Answer 13

FROM
*inferior orbital margin

TO
*lateral aspect of the upper lip

Question 14

Levator labii superioris - Actions

Answer 14

raises & everts upper lip (showing sadness)

Question 15

Levator labii superioris - Innervation

Answer 15

buccal & zygomatic branches of the facial n.

Question 16

Nasalis - Attachments

Answer 16

FROM
*maxilla lateral & inferior to the nasal notch

TO
*bridge & ala of the nose

Question 17

Nasalis - Actions

Answer 17

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

Question 18

Nasalis - Innervation

Answer 18

buccal branch of facial n.

Question 19

Orbicularis oculi - Attachments

Answer 19

FROM
*orbital margin & medial palpebral lig.

TO
*superficial fascia of the eyelid

Question 20

Orbicularis oculi - Actions

Answer 20

a palpebral sphincter (closes eyes, winking)

Question 21

Orbicularis oculi - Innervation

Answer 21

temporal & zygomatic branches of the facial n.

Question 22

Orbicularis oris - Attachments

Answer 22

FROM
*angle of mouth

TO
*superficial fascia of the upper lip

Question 23

Orbicularis oris - Actions

Answer 23

an oral sphincter (closes mouth, kissing)

Question 24

Orbicularis oris - Innervation

Answer 24

buccal & mandibular branches of the facial n.

Question 25

Platysma (G. platys, flat, broad) - Attachments

Answer 25

FROM
*lower border of the mandible

TO
*superficial fascia of the skin of the neck overlying the clavicle

Question 26

Platysma (G. platys, flat, broad) - Actions

Answer 26

wrinkles the anterior nuchal skin (conveying tension or stress)

Question 27

Platysma (G. platys, flat, broad) - Innervation

Answer 27

cervical branch of the facial n.

Question 28

Zygomaticus major [G. zygon, yoke, a joining or pair] - Attachments

Answer 28

FROM
*zygomatic bone

TO
*angle of mouth

Question 29

Zygomaticus major [G. zygon, yoke, a joining or pair] - Actions

Answer 29

raises angle of mouth (smiling, happiness)

Question 30

Zygomaticus major [G. zygon, yoke, a joining or pair] - Innervation

Answer 30

buccal & zygomatic branches of the facial n.