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A + P 1 Before Midterm > Muscles of the Head > Flashcards

Muscles of the Head Flashcards

1
Q

Where do the muscles of the facial expression lie?

A

within the subcutaneous layer of skin

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2
Q

Typically where does a muscle of facial expression originate and insert?

A

originate in a facial bone and insert into dermis of the skin

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3
Q

What do muscles of facial expression function as when they surround natural orifices of the head?

A

sphincter: to close
dialator: to open

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4
Q

What nerve are all muscles of facial expression innervated by?

A

CN VII Facial nerce

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5
Q

Antagonism of the muscles of the facial expression come from where?

A

elasticity of the skin

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6
Q

Where does the frontalis originate?

A

epicranial aponeurosis (galea aponeurotica)

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7
Q

What is the epicranial aponeurosis also known as?

A

Galea aponeurotica

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8
Q

Where does the frontalis insert?

A

skin superior to supraorbital margin

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9
Q

What are the actions of the frontalis?

A

draws scalp anteriorly, raises eyebrows

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10
Q

Where does the occipitalis originate?

A

occipital bone and mastoid process

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11
Q

Where does the occipitalis insert?

A

epicranial aponeurosis

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12
Q

What are the actions of the occipitalis

A

draws scalp posteriorly

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13
Q

What is the origin of the orbicularis oris

A

muscle fibres surrounding opening of mouth

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14
Q

Where does the orbicularis oris insert?

A

skin @ angle of the mouth

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15
Q

What are the actions of the orbicularis oris?

A

closes and protrudes lips (puckering)

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16
Q

Where does the zygomaticus major originate?

A

zygomatic bone

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17
Q

Where does the zygomaticus major insert?

A

skin @ angle of mouth and orbicularis oris

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18
Q

What are the actions of the zygomaticus major

A

draws angle of the mouth superiorly and laterally (smiling)

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19
Q

Where does the zygomaticus minor originate

A

zygomatic bone

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20
Q

Where does the zygomaticus minor insert

A

upper lip

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21
Q

What are the actions of the zygomaticus minor

A

elevates upper lip

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22
Q

Where does the levator labii superioris originate

A

superior to infraorbital foramen

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23
Q

Where does the levator labii superioris insert

A

skin @ angle of mouth and orbicularis oris

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24
Q

What are the actions of the levator labii superioris

A

raises upper lip

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25
Q

Where dos the depressor labii inferioris originate

A

mandible

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26
Q

Where does the depressor labii inferioris insert

A

skin of lower lip

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27
Q

What are the actions of the depressor labii inferioris

A

depresses lower lip

28
Q

Where does the depressor anguli ori originate

A

mandible

29
Q

Where does the depressor anguli ori insert

A

angle of mouth

30
Q

What are the actions of the depressor anguli ori

A

draws angle of mouth laterally and inferiorly

31
Q

Where does the levator anguli oris originate

A

inferior to infraorbital foramen

32
Q

Where does the levator anguli oris insert?

A

skin off lower lip and orbicularis oris

33
Q

What are the actions of the levator anguli oris

A

draws angle of mouth laterally and superiorly

34
Q

Where does the buccinator originate

A

alveolar processes of mandible and maxilla

pterygomandibular raphe

35
Q

Where does the buccinator insert

A

orbicularis oris

36
Q

What are the actions of the buccinator?

A

presses cheeks against teeth (sucking, blowing)

37
Q

Where does the risorius originate

A

fascia over parotid gland

38
Q

Where does the risorius insert

A

skin @ angle o the mouth

39
Q

What are the actions of the risorius

A

draws angle of mouth laterally (fake smile)

40
Q

Where does the mentalis originate

A

mandible

41
Q

Where does the mentalis insert

A

skin of chin

42
Q

What are the actions of mentalis

A

elevates and protrudes lower lip and pulls skin of chin up

43
Q

What is the origin of the platysma

A

fascia over deltoid and pec major

44
Q

What is the insertion of the platysma

A

mandible

45
Q

What are the actions of the platysma

A

draws outer part of lower lip inferiorly and posteriorly (pouting)

46
Q

What is the origin of the orbicularis oculi

A

medial wall of orbit

47
Q

What is the insertion of the orbicularis oculi

A

circular path around orbit

48
Q

What are the actions of the orbicularis oculi

A

closes eye

49
Q

What is the origin of the corrugator supercilli

A

medial end of supercillary arch of frontal bone

50
Q

Where does the corrugator supercilli insert

A

skin of eyebrow

51
Q

What are the actions of corrugator supercilli

A

draws eyebrows inferiorly and wrinkles skin of forehead (frowning)

52
Q

How many muscles move the mandible? What are they?

A

4: masseter, temporalis, medial/lateral pterygoid

53
Q

What nerve are all the muscles that move the mandible innervated by

A

CNV Trigeminal

54
Q

What is the origin of the masseter

A

maxilla and zygomatic arch

55
Q

What is the insertion of the masseter

A

angle and ramus of the mandible

56
Q

What are the actions of the masseter

A

protract + elevates mandible

57
Q

What is the origin of the temporalis

A

temporal bone (fossa)

58
Q

What is the insertion of the temporalis

A

coronoid process and ramus of mandibl

59
Q

What are the actions of the temporalis

A

elevate and retract the mandible

60
Q

What is the origin of the media pterygoid

A

medial surface of lateral portion of pterygoid process and maxilla

61
Q

What is the insertion of the medial pterygoid

A

angle and ramus of mandible

62
Q

What are the actions of the medial pterygoid

A

elevates and protracts mandible + lateral movements

63
Q

What is the origin of the lateral pterygoid

A

greater wing and lateral surface of lateral portion of the pterygoid process of sphenoid

64
Q

What is the insertion of the lateral pterygoid

A

condyle of mandible ; tmj

65
Q

What are the actions of the lateral pterygoid

A

protract, depress, lateral movements of mandible

A + P 1 Before Midterm (25 decks)

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