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EXCI 254 > muscle of the face > Flashcards

muscle of the face Flashcards

1
Q

def of scalp

A

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

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2
Q

characteristic of skin

A

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

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3
Q

characteristic of CT

A

(highly vascularized subcutaneous layer, well supplied with nerves)

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4
Q

what is an aponeurosis

A

(strong tendinous sheet)

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5
Q

function of loose areolar tissus

A

(sponge-like, allows movement of 1st

3 layers)

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6
Q

function of pericranium

A

(forms external periosteum of calvaria)

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7
Q

where does muscle of facial expression lie

A

within the layers of superficial fascia

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8
Q

origin and insertion of muscle of facial expression

A

Usually originate in fascia or bones of the skull

• Usually insert into the skin

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9
Q

which muscle fo facial expression are the most important

A

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

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10
Q

action of frontalis

A

Draws scalp anteriorly, raises eyebrows and wrinkles

skin of forehead horizontally

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11
Q

action of occipitals

A

Draws scalp posteriorly

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12
Q

action of orbiculares iris

A

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

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13
Q

action of zyg major

A

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

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14
Q

action of zyg minor

A

Elevates upper lip, exposing maxillary teeth

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15
Q

action of elevator anguli oris

A

Pulls the angle of the mouth upward

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16
Q

action of levator labii sup

A

Elevates upper lip

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17
Q

action of depressor labii ing

A

Depresses lower lip

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18
Q

action of depressor anguli iris

A

Draws angle of mouth laterally and inferiorly as in opening mouth

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19
Q

action of buccinator

A

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)

20
Q

action of mentalis

A

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

21
Q

action of rigorous

A

Draws angle of mouth laterally, as in tenseness

22
Q

action of platysma

A

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

23
Q

action of orbiculares ocul

A

close eyes

24
Q

action of corrugated

A

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

25
Q

action of procerus

A

Wrinkles the skin between the eyebrows

26
Q

which muscle move the mandible

A

Masseter

• Temporalis • Medial Pterygoid • Lateral Pterygoid

27
Q

action of master

A

Elevate mandible, as in closing mouth, and retracts mandible

28
Q

temporalis

A

Elevates and retracts mandible

29
Q

action of medial pterygoid

A

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

30
Q

action of lateral pteryfois

A

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

31
Q

action of genioglossus

A

Depresses tongue and thrusts it anteriorly

32
Q

action of styloglossus

A

Elevates tongue and draws it posteriorly

33
Q

action of palatoglossus

A

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

34
Q

action of hyoglosses

A

Depresses tongue and draws down its sides

35
Q

muscle of the floor of oral cavity

A

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

36
Q

action of digastric

A

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

37
Q

action of stylohyoid

A

Elevates hyoid bone and draws it posteriorly

38
Q

action of mylohyoid

A

Elevates hyoid bone and floor of mouth and depresses mandible

39
Q

action of geniohyoid

A

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

40
Q

action of SCM

A

• 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

41
Q

extrinsic muscle of larynx

A
  • Omohyoid (C1-C3)
  • Sternohyoid (C1-C3)
  • Sternothyroid (C1-C3)
  • Thyrohyoid (CN XII, C1)
42
Q

action of omohyoid and sternohyoid

A

Depresses hyoid bone

43
Q

action of sternothyroid

A

Depresses thyroid cartilage of larynx

44
Q

action of thyrohyoid

A

Elevates thyroid cartilage and depresses hyoid bone

45
Q

what is anesthesia

A

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

EXCI 254 (10 decks)

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