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Anatomy > Face Musles Lec > Flashcards

Face Musles Lec Flashcards

1
Q

All facial muscles (not mastication) are innervated by what nerve

A

facial nerve - cranial nerve 7

has lots of branches

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2
Q

what are the parts that make up the face

A

calvaria, floor of the cranial cavity, viscerocranium

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3
Q

What is the pterion and what happens if you get hit there?

A

4 bones meet together, get hit go to sleep

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4
Q

Orbicularis oculi

A

Palpebral part: gently shuts the eye
Orbital part: forcefully shuts the eye

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5
Q

How many bones of the cranium are there

A

22

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6
Q

*know the layers of muscles

A
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7
Q

Occipitofrontalis

A

Wrinkles forehead, lifts eyebrows

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8
Q

Nasalis

A

Transverse part: compresses nasal appetite
Alar part: flares the nostrils

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9
Q

Procerus

A

Draws down medial angle of eyebrows, produces horizontal lines over nose

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10
Q

Depressor Septi

A

Pull nose inferiorly (bunny nose)

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11
Q

Depressor anguli oris

A

Frown

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12
Q

Depressor labii inferioris

A

Draws bottom lip inferiorly and laterally

“Yikes”

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13
Q

Mentalis

A

Raises and protrudes lower lip

Pout

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14
Q

Corrugartor supercilii

A

Draws eyes medially and downward

Angry face, villain name

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15
Q

Risorius

A

Retracts corners of mouth (half effort grin)

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16
Q

Zygomaticus

A

Major: smile (corners of mouth up and away)

Minor: draws upper lip upward (showing teeth)

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17
Q

Orbicularis oris

A

Closed lips, protrudes lips

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18
Q

Buccinator

A

Presses cheek against teeth, compresses distended cheeks

19
Q

Platysma

A

Tenses skin of neck and can bring corners of mouth down

20
Q

Bell’s palsy

A

Bell’s palsy is a condition characterized by sudden, temporary weakness or paralysis of the muscles on one side of the face due to inflammation or compression of the facial nerve (cranial nerve VII).

21
Q

Stroke (CVA)

A

typically lower part of face is affected, sudden onset

22
Q

TMJ bone articulation

A

mandibular fossa on temporalis bone meets with mandibular condyle on mandible

23
Q

Articular disk lies between

A

mandibular fossa and mandibular condyle

24
Q

What is the function of the articular disc in the TMJ joint?

A

increases congruency
minimizes loss of mobility
reduces friction
decreases biomechanical stress

25
Q

The TMJ disc has two parts - what movements do they allow?

A

lower part allows depression and elevation

upper part allows protrusion and retraction

26
Q

disc attachments

A
27
Q

Muscles of mastication

A

masseter
temporalis
medial and lateral pterygoid

28
Q

Masseter

A

A: elevate mandible
O: zygomatic arch and maxillary process
I: lateral mandibular rami
N: Masseteric N from anterior trunk of mandibular N

29
Q

Temporalis

A

A: elevate and retract the mandible
O: temporal fossa
I: coronoid process and mandibular rami
N: deep temporal N from anterior trunk of mandibular N

30
Q

Medial Pterygoid (internus)

A

A: elevate and contralaterally deviate mandible, both together would close the jaw
O:
- deep head; lateral plate of pterygoid process of sphenoid bone and palatine bone
- superficial head; tuberosity of maxilla and palatine bone

I: medial mandible near angle

N: Nerve to medial pterygoid from mandibular N

31
Q

Lateral Pterygoid

A

A: protrusion and contralateral deviation of mandible

O: upper head; roof of infratemporal fossa, lower head; lateral surface of lateral plate of pterygoid process

I: capsule of TMJ near attachment to DISC; pterygoid fovea on mandibular neck

N: nerve to lateral pterygoid from anterior trunk of mandibular N or from buccal branch

32
Q

Which mastication muscle attaches directly to the disc?

A

lateral pterygoid

33
Q

Digastric muscle is ____ innervated

A

Dual

N: anterior belly; trigeminal N - Mandibular N

Posterior belly; facial nerve

34
Q

digastric muscle action

A

anterior belly; opens mouth by lowering mandible; raises hyoid

Posterior belly - pulls hyoid upward and back

35
Q

list the three ligaments of the TMJ joint

A

temporomandibular

stylomandibular ligament

sphenomandibular

36
Q

What artery primarily feeds muscles of the face

A

external carotid artery

37
Q

What is a nerve that does lots of sensory innervation to the face

A

trigeminal nerve

38
Q
A
39
Q

Bruxism

A

teeth drinding

40
Q

plagiocephaly

A

asymmetrical flattening of one side of the skull

41
Q

brachycephaly

A

flattened appearance at the back of the head

42
Q

scaphocephaly

A

long narrow head

43
Q

12 cranial nerves

A

o o o to touch and feel very good velvet ahhh

olfactory
optic
oculomotor
trochlear
trigeminal
abducens
facial
vestibulocochlear
glossopharyngeal
vagus
accessory
hypoglassal

Anatomy (23 decks)

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