Muscles of the Face- Lecture 14

Question 1

What are the 10 muscles of facial expression?

Answer 1

Platysma
Occipitofrontalis
Orbicularis Oculi
Procerus
Risorius
Orbicularis
Nasalis
Zygomaticus Minor
Zygomaticus Major
Levator Labii Superioris

POOP RON (wee)ZZL(y)

Question 2

What is the origin of the platysma?

Answer 2

SubQ of infraclavicular and supraclavicular regions

Question 3

What is the insertion of the platysma?

Answer 3

Base of mandible
Skin of cheek
Lower lip and of the mouth
Orbicularis oris

Question 4

What action is the Platysma responsible for?

Answer 4

Depressing the mandible

Tensing the skin of the inferior face and neck

Question 5

What are the 2 origins of the Occipitofrontalis?

Answer 5

Anteriorly from epicranial aponeurosis

Posteriorly from the superior nuchal line

Question 6

What are the 2 insertions of the Occipitofrontalis?

Answer 6

Epicranial aponeurosis posteriorly

Skin of the the eyebrows and forehead

Question 7

What action is the Occipitofrontalis is responsible for?

Answer 7

Elevates eyebrows

Protracts the scalp

Question 8

What is the origin of the Orbicularis Oculi?

Answer 8

Orbital margin
Palpebral ligament
Lacrimal bone

Question 9

What is the insertion of the Orbicularis Oculi?

Answer 9

Skin around the margin of the orbit

Question 10

What action is the Orbicularis Oculi responsible for?

Answer 10

Closes eyelids

Question 11

What is the origin of the Procerus?

Answer 11

Facial aponeurosis

Lateral nasal catilages

Question 12

What is the insertion of the Procerus?

Answer 12

Skin between eyebrows

Question 13

What action is the Procerus responsible for?

Answer 13

Depresses the medial sides of the eyebrows

Wrinkles skin over the dorsum of the nose

Question 14

What is the origin of the Risorius?

Answer 14

Parotic fascia

Buccal skin

Question 15

What is the insertion of the Risorius?

Answer 15

Angle of the mouth

Question 16

What action is the Risorius responsible for?

Answer 16

Depresses labial commissures (corner of the mouth)

Question 17

What is the origin of the Zygomaticus Minor?

Answer 17

Anterior part of the zygomatic bone

Question 18

What is the insertion of the Zygomaticus Minor?

Answer 18

Skin of the upper lip

Question 19

What action is the Zygomaticus Minor responsible for?

Answer 19

Dilation of the mouth

Question 20

What is the origin of the Zygomaticus Major?

Answer 20

Lateral part of the zygomatic bone

Question 21

What is the insertion of the Zygomaticus Major?

Answer 21

Angle of mouth

Question 22

What action is the Zygomaticus Major responsible for?

Answer 22

Elevates labial commissures (corner of the mouth)

Question 23

What is the origin of the Levator Labii Superioris?

Answer 23

Infraorbital margin

Question 24

What is the insertion of the Levator Labii Superioris?

Answer 24

Skin of the upper lip

Question 25

What action is the Levator Labii Superioris responsible for?

Answer 25

Dilation of the mouth- similar to Zygomaticus minor

Question 26

What are the 2 muscles of the mouth and lips?

Answer 26

Depressor anguli oris

Depressor labii inferioris

Question 27

What is the origin for the Depressor anguli oris?

Answer 27

Anterolateral base of the mandible

Question 28

What is the insertion for the Depressor anguli oris?

Answer 28

Angle of mouth

Question 29

What action is the Depressor anguli oris responsible for?

Answer 29

Depresses labial commissures (corner of the mouth)

*Opposite of the Zygomaticus Major

Question 30

What is the origin for the Depressor labii inferioris?

Answer 30

Platysma and anterolateral body of the mandible

Question 31

What is the insertion for the Depressor labii inferioris?

Answer 31

Skin of the lower lip

Question 32

What action is the Depressor lbii inferioris responsible for?

Answer 32

Mouth dilator

Depresses and everts the lower lip