Facial Muscles

Question 0

What are the attachment points of frontalis?

Answer 0

skin near the eyebrows - epicranial aponeurosis

Question 1

What are the attachment points of occipitalis?

Answer 1

superior nuchal line - epicranial aponeurosis

Question 2

What is the action of orbicularis oculi?

Answer 2

squinting (sphincter of the eye, closes eyelids)

Question 3

What muscle is responsible for squinting?

Answer 3

orbicularis oculi

Question 4

What is the action of corrugator supercilii?

Answer 4

frown/anger (draws eyebrows inferiorly and medially)

Question 5

What muscle is responsible for frowning/anger (drawing eyebrows medially and inferiorly)?

Answer 5

corrugator supercilii

Question 6

What is the action of levator labii superioris?

Answer 6

raising upper lip

Question 7

What two muscles are responsible for raising the upper lip?

Answer 7

levator labii superioris and zygomaticus minor

Question 8

What is the action of occipitofrontalis?

Answer 8

occipitalis anchors the aproneurosis so that frontalis can pull the eyebrows up

Question 9

What is the action of zygomaticus minor?

Answer 9

raising the upper lip

Question 10

What muscle is responsible for dilating the nostrils?

Answer 10

levator labii aleque nasi

Question 11

What action does levator labii aleque nasi do?

Answer 11

raises lip, dilates nostril

Question 12

What muscle is responsible for smiling (drawing the angle of the mouth superolaterally)?

Answer 12

zygomaticus major

Question 13

What is the action of zygomaticus major?

Answer 13

smiling (draws the angle of the mouth superolaterally)

Question 14

What is the action of orbicularis oris?

Answer 14

whistling/kissing/speech (sphincter of the mouth, closes and protrudes lips, compresses lips against teeth)

Question 15

What muscle is responsible for kissing/whistling/speech?

Answer 15

orbicularis oris?

Question 16

What is the action of mentalis?

Answer 16

pouting (raises and protrudes lower lip)

Question 17

What muscle is responsible for drawing the lips inferiorly and slightly laterally?

Answer 17

depressor labii inferioris

Question 18

What is the action of depressor labii inferioris?

Answer 18

impatience (draws lip inferiorly and slightly laterally)

Question 19

What is the action of depressor anguli oris?

Answer 19

sadness (depresses the corner of the mouth)

Question 20

What muscle is responsible for pouting (raising and protruding the lower lip)?

Answer 20

mentalis

Question 21

What is the action of buccinator?

Answer 21

whistling/forceful blowing (compresses cheek against molars while chewing)

Question 22

What muscle is responsible for sadness (depressing the corners of the mouth)?

Answer 22

depressor anguli oris

Question 23

What muscle is responsible for whistling/forceful blowing?

Answer 23

buccinator

Question 24

What is the action of platysma?

Answer 24

Black Lagoon (retracts and depresses angle of the mouth)

Question 25

What muscle is responsible for Black Lagoon (retracts and depresses angle of the mouth)?

Answer 25

platysma

Question 26

What muscle is responsible for pulling the mouth laterally?

Answer 26

risorius

Question 27

What is the action of risorius?

Answer 27

pulls the mouth laterally

Question 28

What are the actions of auricularis anterior/superior/posterior?

Answer 28

drawing ears up & forward/up/back

Question 29

What muscles are responsible for drawing the ears up & forward/up/back?

Answer 29

auricularis anterior/superior/posterior

Question 30

Where does the vertebral arteries travel, and what do they form?

Answer 30

from subclavian artery through the transverse foramina through the foramen magnum where the join to form the basilar artery

Question 31

What is the circle of Willis?

Answer 31

the 2 vertebral arteries and the 2 internal carotid arteries provide most of the blood supply to the brain

Question 32

What are sinuses?

Answer 32

large veins that drain blood from the brain and pass into the internal jugular vein