Quiz On Muscles Of Facial Expressios And Mastication

Front 1

The epicranial consists of

Back 1

the frontalis, occipitalis , and an aponeurosis

Front 2

Frontails location

Back 2

forehead region

Front 3

Occipitails location

Back 3

occiput region

Front 4

Aponeurosis location

Back 4

extending between frontails and occipitails over the top of the skull

Front 5

Function of Epicranial

Back 5

contraction of the frontalis causes horizontal wrinkling of the forehead and elevation of the eyebrows. Action of the occipitalis causes the scalp to be pulled backward.

Front 6

Orbicularis oris location

Back 6

just under the skin of the lips

Front 7

Function of Orbicularis oris

Back 7

closes the lips in various ways: by compressing over teeth, or by pouting and pursuing them; used in kissing

Front 8

Orbicularis oculi location

Back 8

each eye is surrounded by one of these sphincters

Front 9

Function of Orbicularis oculi

Back 9

Blinking and squinting

Front 10

Zygomaticus location

Back 10

extends diagonally from the zygomatic bone to the corner of the mouth

Front 11

Function of Zygomaticus

Back 11

Smiling and laughing

Front 12

Quandratus labii superioris location

Back 12

lies between the eye and upper lip

Front 13

Function of Quandratus labii superioris

Back 13

Furrowing, expression of disdain or contempt

Front 14

Quadratus labii inferioris location

Back 14

extends from the lower lip to the mandible

Front 15

Function of Quadratus labii inferioris

Back 15

pulls lower lip down in irony

Front 16

Triangularis location

Back 16

lateral to the quadratus labii inferioris

Front 17

Function of Trangularis

Back 17

Antagonist to zygomaticus; depresses corner of the mouth

Front 18

Platysma location

Back 18

extends from the mandible over the side of the neck

Front 19

Function of the Platysma

Back 19

Contraction causes the lower lip to move backward and downward, expressing horror

Front 20

Masseter location

Back 20

extends from the angle of the mandible to the zygomatic

Front 21

Function of the Masseter

Back 21

raises the mandible

Front 22

Temporalis location

Back 22

side of the skull (temples)

Front 23

Function of Temporalis

Back 23

acts synergistically with the master to raise the mandible, can also cause retraction of the mandible when only the posterior fibers of the muscle are activated.

Front 24

Pterygoideus internus location

Back 24

medial surface of the ramus, "internal masseter"

Front 25

Function of Pterygoideus internus

Back 25

works synergistically with the masseter and temporalis to raise the mandible

Front 26

Pterygoideus externus location

Back 26

Above Pterygoideus internus

Front 27

Function of Pterygoideus externus

Back 27

Acting together, the two external pterygoids can cause the mandible to move forward, and downward. Individually, they can move the mandible laterally, to the right, or to the left.

Front 28

Buccinator location

Back 28

horizontal muscle that partially obscures the teeth

Front 29

Function of Buccinator location

Back 29

compresses the cheek to hold food between the teeth during chewing