Oral Group POINAS

Question 1

Depressor Anguli Oris O

Answer 1

Mandibular oblique line (more laterally)

Question 2

Depressor Anguli Oris I

Answer 2

Skin at corner of mouth

Question 3

Depressor Anguli Oris A

Answer 3

Frown

Question 4

Depressor Labii Inferioris O

Answer 4

Anteriolateral body of mandible

Question 5

Depressor Labii Inferioris I

Answer 5

Lower Lip

Question 6

Depressor Labii Inferioris A

Answer 6

Draws lower lip downward and laterally; like a partial cringe

Question 7

Mentalis O

Answer 7

mandible inferior to incisors

Question 8

Mentalis I

Answer 8

Skin of chin

Question 9

Mentalis A

Answer 9

Raises and protrudes lower lip

Question 10

Corrugator Supercilii o

Answer 10

Medial end of superciliary arch

Question 11

Corrugator Supercilii I

Answer 11

Skin of medial half of eyebrow

Question 12

Corrugator Cupercilii A

Answer 12

Draws eyebrows medially and downward

Question 13

Risorius O

Answer 13

Fascia over masseter

Question 14

Risorius I

Answer 14

Skin in corner of mouth

Question 15

Risorius A

Answer 15

Retracts corners of mouth (half-effort grin)

Question 16

Zygomaticus O

Answer 16

Major: Lateral surface zygomatic bone (posterior)
Minor: Lateral surface of zygomatic bone (anterior)

Question 17

Zygomaticus I

Answer 17

Major: Skin at corner of mouth
Minor: Upper lip, medial to corner of mouth

Question 18

Zygomaticus A

Answer 18

Draws upper lip upward (showing teeth)

Question 19

Orbicularis Oris O

Answer 19

Lots of muscles in the area; maxilla and mandible in midline

Question 20

Orbicularis Oris I

Answer 20

Makes a complete “O” shape around mouth

Question 21

Orbicularis Oris A

Answer 21

closes lips; protrudes lips

Question 22

Buccinator O

Answer 22

posterior parts of maxilla and mandible

Question 23

Buccinator I

Answer 23

Blends with orbicularis oris and into lips

Question 24

Buccinator A

Answer 24

Presses cheek against teeth; compresses distended cheeks (think: play the bugle)

Question 25

Platysma O

Answer 25

Below clavicle on upper throax

Question 26

Platysma I

Answer 26

Medial fibers attach to chin, lateral fibers join muscles around the mouth

Question 27

Platysma A

Answer 27

Tenses skin of the neck and can bring corners of mouth down