Perioral Muscles

Question 1

Orbicularis oris

Answer 1

primary muscle of lip movements

superior and inferior aspects

free standing bone-no bone attachement

Question 2

Orbicularis Oris Origin

Answer 2

muscle fibers surrounding mouth

Question 3

Orbicularis Oris Insert

Answer 3

fibers incircle mouth, some attach to skin and muscles at angle of the mouth

Question 4

Orbicularis Oris Action

Answer 4

close lips, compress lips against teeth, help protrude lips and shape lips during speech, draw oral angles midline (0)

Question 5

Levator labii superior origin

Answer 5

maxilla and zygomatic bone

Question 6

levator labii superior insert

Answer 6

muscles of upper lip

Question 7

levator labii superior action

Answer 7

raise upper lip

Question 8

zygomaticus minor origin

Answer 8

zygomatic bone

Question 9

zygomaticus minor insert

Answer 9

muscles of upper lip

Question 10

zygomaticus minor action

Answer 10

elevates upper lip

Question 11

zygomaticus major origin

Answer 11

zygomatic bone

Question 12

zygomaticus major insert

Answer 12

muscles at angle of the mouth

Question 13

zygomaticus major action

Answer 13

draws angle of mouth upward and outward

Question 14

levator anguli oris origin

Answer 14

maxilla bone

Question 15

levator anguli oris insert

Answer 15

muscles at angle of the mouth

Question 16

levator anguli oris action

Answer 16

raises angle of mouth

Question 17

mentalis origin

Answer 17

mandible (near symphysis)

Question 18

mentalis insertion

Answer 18

skin of chin

Question 19

mentalis action

Answer 19

raises lower lip, wrinkles of skin of chin, lip compression

Question 20

depressor labii inferior origin

Answer 20

mandible

Question 21

depressor labii inferior insert

Answer 21

skin and muscles of lower lip, between angle and midline

Question 22

depressor labii inferior action

Answer 22

draws lower lip downward and laterally, lowers angle of mouth

***origin is below insertion

Question 23

depressor anguli oris origin

Answer 23

mandible

Question 24

depressor anguli oris insert

Answer 24

muscles at angle of mouth

Question 25

depressor anguli oris action

Answer 25

draws angle of mouth downward and laterally

Question 26

buccinator origin

Answer 26

mandible and maxilla in region near the molars

Question 27

buccinator insert

Answer 27

muscles at angle of the mouth

Question 28

buccinator action

Answer 28

compresses cheek against teeth, provides a stable lateral wall for oral pressure development during speech, chewing, and wind instrument sound generation

**deep to risorius mm

Question 29

risorius origin

Answer 29

fascia of masseter muscle

Question 30

risorius insert

Answer 30

skin at the angle of the mouth

Question 31

risorius action

Answer 31

retracts angle of mouth

Question 32

Describe the soft palate (velum)

Answer 32

posterior to hard palate

made of muscle and other short tissues, lacks bone

Question 33

What are the 3 major levels of the pharyngeal cavity?

Answer 33

nasopharynx, oropharynx, laryngopharynx

Question 34

What is the velopharyngeal port?

Answer 34

modifies the degree of coupling between the nasopharynx and the rest of the vocal tract

as the velum is raised or lowered overall shape of the VT and resonance is altered

Question 35

What happens to the velum when we approach a nasal sound?

Answer 35

the velum is lowered to add length to the vocal tract

Question 36

What happens to the velum when we approach a non-nasal sound?

Answer 36

the velum is elevated and retracted to seal the VP and partition the nasal cavity (forces air through the oral cavity)

Question 37

Inadequate closure of the VP may result in..

Answer 37

• nasalized speech

- inability to generate oral pressure