Lip Muscles

Question 1

Obicularis Oris Origin/Insertion (Intrinsic)

Answer 1

Forms a ring of muscle from within the upper and lower lips

Question 2

Obicularis Oris Use

Answer 2

Close mouth, purse lips

Question 3

Buccinator Origin

Answer 3

Alveolar process of the maxilla, and the mandible near the last molars

Question 4

Buccinator Insertion

Answer 4

Upper and lower lips near the corner of the mouth

Question 5

Buccinator Use

Answer 5

Pull the mouth corner backward and toward the side and can force the lip and cheek against the teeth

Question 6

Risorius Origin

Answer 6

Fascia of the masseter muscle

Question 7

Risorius Insertion

Answer 7

Corner of mouth and lower lip

Question 8

Risorius Use

Answer 8

Draws the corner of the mouth backward and toward the side

Question 9

Levator Labii Superiosis Origin

Answer 9

Below the orbit of the eye, the front of the maxillary bone, and the zygomatic bone

Question 10

Levator Labii Superiosis Insertion

Answer 10

Upper Lip

Question 11

Levator Labii Superiosis Use

Answer 11

Elevates the upper lip

Question 12

Levator Labii Superiosis Alaeque Nasi Origin

Answer 12

Front of the maxilla

Question 13

Levator Labii Superiosis Alaeque Nasi Insertion

Answer 13

Lip segment inserts in the upper lip

Question 14

Levator Labii Superiosis Alaeque Nasi Use

Answer 14

Lip segment elevates the upper lip (nasal segment dilates the anterior naris)

Question 15

Zygomatic Major Origin

Answer 15

Side of the zygomatic bone

Question 16

Zygomatic Major Insertion

Answer 16

Corner of the mouth

Question 17

Zygomatic Major Use

Answer 17

Pulls backward on the corner of the mouth and lifts it upward and toward the side

Question 18

Zygomatic Minor Origin

Answer 18

Inner surface of the zygomatic bone

Question 19

Zygomatic Minor Insertion

Answer 19

Upper Lip

Question 20

Zygomatic minor Use

Answer 20

Elevates the upper lip and pulls the corner of the mouth upward

Question 21

Depressor Labii Inferiosis Origin

Answer 21

Front surface of the mandible

Question 22

Depressor Labii Inferiosis Insertion

Answer 22

Lower lip from near the midline to the corner of the mouth

Question 23

Depressor Labii Inferiosis Insertion

Answer 23

Lower lip from near the midline to the corner of the mouth

Question 24

Depressor Labii Inferiosis Insertion

Answer 24

Lower lip from near the midline to the corner of the mouth

Question 25

Depressor Labii Inferiosis Insertion

Answer 25

Lower lip from near the midline to the corner of the mouth

Question 26

Depressor Labii Inferiosis Use

Answer 26

Pulls the lower lip downward and toward the side and may also cause the lower lip to turn outward

Question 27

Mentalis Origin

Answer 27

Front and side of the mandible near the midline

Question 28

Mentalis Insertion

Answer 28

Obicularis oris muscle and skin overlying the chin

Question 29

Mentalis Use

Answer 29

Pulls chin tissue upward, forces lower part of lower lip against the alveolar process of the mandible, and curls the lower lip outward

“Pouting Muscle”

Question 30

Levator Anguli Oris Origin

Answer 30

Front of the maxilla

Question 31

Levator Anguli Oris Insertion

Answer 31

Both the upper and lower lips near the corner of the mouth

Question 32

Levator Anguli Oris Use

Answer 32

Draws the corner of the mouth upward and toward the side and may raise the lower lip against the upper lip

Question 33

Depressor Anguli Oris Origin

Answer 33

Outer surface of the mandible

Question 34

Depressor Anguli Oris Insertion

Answer 34

On the obicularis oris muscle at the corner of the mouth and into the upper lip

Question 35

Depressor Anguli Oris Use

Answer 35

Pulls the corner of the mouth downward and draws the upper lip downward toward the lower lip

Question 36

Incisivus Labii Superiosis Origin

Answer 36

Maxilla near the canine tooth

Question 37

Incisivus Labii Superiosis Insertion

Answer 37

Corner of the mouth

Question 38

Incisivus Labii Superiosis Use

Answer 38

Pulls the corner of the mouth upward and toward the midline

Question 39

Incisivus Labii Inferiosis Origin

Answer 39

Mandible near the lateral incisor tooth

Question 40

Incisivus Labii Inferiosis Insertion

Answer 40

Corner of the mouth

Question 41

Incisivus Labii Inferiosis Use

Answer 41

Pulls downward and inward on the corner of the mouth

Question 42

Platysma Origin

Answer 42

A sheet of connective tissue within the neck and above the clavicle (and may extend from farther below)

Question 43

Platysma Insertion

Answer 43

Lower edge of the mandible and some fibers blend with muscles of the lower lip and corner of the mouth