muscle of the face

Question 1

def of scalp

Answer 1

skin, connective tissue, aponeurosis, loose areolar tissue, pericranium

Question 2

characteristic of skin

Answer 2

(sweat and sebaceous gland, abundant arterial supply, good venous and lymphatic drainage)

Question 3

characteristic of CT

Answer 3

(highly vascularized subcutaneous layer, well supplied with nerves)

Question 4

what is an aponeurosis

Answer 4

(strong tendinous sheet)

Question 5

function of loose areolar tissus

Answer 5

(sponge-like, allows movement of 1st

3 layers)

Question 6

function of pericranium

Answer 6

(forms external periosteum of calvaria)

Question 7

where does muscle of facial expression lie

Answer 7

within the layers of superficial fascia

Question 8

origin and insertion of muscle of facial expression

Answer 8

Usually originate in fascia or bones of the skull

• Usually insert into the skin

Question 9

which muscle fo facial expression are the most important

Answer 9

Most important are those surrounding orifices of the
head (eyes, nose, mouth) • Sphincters
• Dilators

Question 10

action of frontalis

Answer 10

Draws scalp anteriorly, raises eyebrows and wrinkles

skin of forehead horizontally

Question 11

action of occipitals

Answer 11

Draws scalp posteriorly

Question 12

action of orbiculares iris

Answer 12

Closes and protrudes lips, compresses lips against teeth and shapes lips during speech

Question 13

action of zyg major

Answer 13

Draws angle of mouth superiorly and laterally, as in smiling or laughing

Question 14

action of zyg minor

Answer 14

Elevates upper lip, exposing maxillary teeth

Question 15

action of elevator anguli oris

Answer 15

Pulls the angle of the mouth upward

Question 16

action of levator labii sup

Answer 16

Elevates upper lip

Question 17

action of depressor labii ing

Answer 17

Depresses lower lip

Question 18

action of depressor anguli iris

Answer 18

Draws angle of mouth laterally and inferiorly as in opening mouth

Question 19

action of buccinator

Answer 19

Presses cheeks against teeth and lips (whistling, blowing, and sucking), draws corner of mouth laterally and assists in mastication by keeping food btw teeth (and not btw teeth and cheeks)

Question 20

action of mentalis

Answer 20

Elevates and protrudes lower lip and pulls the skin of the chin up (pouting)

Question 21

action of rigorous

Answer 21

Draws angle of mouth laterally, as in tenseness

Question 22

action of platysma

Answer 22

Draws outer part of lower lip inferiorly and posteriorly (pouting), depresses mandible

Question 23

action of orbiculares ocul

Answer 23

close eyes

Question 24

action of corrugated

Answer 24

Draws eyebrow inferiorly and wrinkles skin of forehead vertically as in frowning

Question 25

action of procerus

Answer 25

Wrinkles the skin between the eyebrows

Question 26

which muscle move the mandible

Answer 26

Masseter | • Temporalis • Medial Pterygoid • Lateral Pterygoid

Question 27

action of master

Answer 27

Elevate mandible, as in closing mouth, and retracts mandible

Question 28

temporalis

Answer 28

Elevates and retracts mandible

Question 29

action of medial pterygoid

Answer 29

ACTION: Elevates and protracts mandible and moves mandible form side to side

Question 30

action of lateral pteryfois

Answer 30

Protracts mandible, depresses mandible as in opening mouth, and moves mandible from side to side

Question 31

action of genioglossus

Answer 31

Depresses tongue and thrusts it anteriorly

Question 32

action of styloglossus

Answer 32

Elevates tongue and draws it posteriorly

Question 33

action of palatoglossus

Answer 33

Elevates posterior portion of tongue and draws soft palate down on tongue

Question 34

action of hyoglosses

Answer 34

Depresses tongue and draws down its sides

Question 35

muscle of the floor of oral cavity

Answer 35

Digastric (CN V, VII) • Stylohyoid (CN VII) • Mylohyoid (CN V) • Geniohyoid (CN XII)

Question 36

action of digastric

Answer 36

Elevates hyoid bone and depresses mandible, as in opening the mouth

Question 37

action of stylohyoid

Answer 37

Elevates hyoid bone and draws it posteriorly

Question 38

action of mylohyoid

Answer 38

Elevates hyoid bone and floor of mouth and depresses mandible

Question 39

action of geniohyoid

Answer 39

Elevates hyoid bone, draws hyoid bone and tongue anteriorly and depresses mandible

Question 40

action of SCM

Answer 40

• Acting bilaterally: flex the cervical portion of vertebral column, extend head, and elevates sternum during forced inspiration • Acting unilaterally: laterally flex and rotate head to side opposite contracting muscle

Question 41

extrinsic muscle of larynx

Answer 41

* Omohyoid (C1-C3) * Sternohyoid (C1-C3) * Sternothyroid (C1-C3) * Thyrohyoid (CN XII, C1)

Question 42

action of omohyoid and sternohyoid

Answer 42

Depresses hyoid bone

Question 43

action of sternothyroid

Answer 43

Depresses thyroid cartilage of larynx

Question 44

action of thyrohyoid

Answer 44

Elevates thyroid cartilage and depresses hyoid bone

Question 45

what is anesthesia

Answer 45

General anesthesia results in total relaxation of the genioglossus, Causes tongue to fall posteriorly, obstructing airway to lungs