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Med School Yr 2 > Muscles of Facial Expression > Flashcards

Muscles of Facial Expression Flashcards

1
Q

the muscles of facial expression are all innervated by branches of what nerve?

A

facial nerve (CN VII)

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2
Q

what is the muscle of the scalp?

A

occipitofrontalis

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3
Q

the occipitofrontalis has two ‘bellies’ - what are they?

A

occipital belly and frontal belly

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4
Q

what are the origins and insertions of the occipitofrontalis?

A

occipital belly
* origin - highest nuchal line/occipital bone)
* insertion - epicranial aponeurosis

frontal belly
* origin - epicranial aponeurosis
* insertion - skin of the eyebrows

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5
Q

what is the action of the occipitofrontalis?

A

pull skin on forehead up and forms horizontal lines

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6
Q

what muscles of facial expression are innervated by the temporal branches of the facial nerve?

A
  • frontalis
  • orbicularis oculi
  • corrugator supercili
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7
Q

what muscles of facial expression are innervated by the zygomatic branches of the facial nerve?

A

orbicularis oculi

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8
Q

what muscles of facial expression are innervated by the buccal branches of the facial nerve?

A
  • orbicularis oris
  • buccinator
  • zygomaticus
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9
Q

what muscles of facial expression are innervated by the marginal mandibular branches of the facial nerve?

A
  • mentalis
  • depressor labii inferioris
  • depressor anguli oris
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10
Q

what muscles of facial expression are innervated by the cervical branches of the facial nerve?

A

platysma

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11
Q

label these muscles

A
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12
Q

label these facial muscles

A
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13
Q

what are the origins and insertions of the procerus muscle?

A

origin - bridge of the nose
insertion - skin of the forehead

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14
Q

what is the action of the procerus muscle?

A

forms horizontal wrinkle on the root of the nose

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15
Q

what are the two parts of the orbicularis occuli?

A

orbital
palpebral
(lacrimal)

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16
Q

what are the origins and insertion of the orbital part of the orbicularis occuli?

A

medial palpebral ligament

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17
Q

what are the actions of the orbital part of the orbicularis occuli?

A

firmly closes the eyelids

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18
Q

what are the origins and insertions of the palpebral part of the orbicularis occuli?

A

origin - medial palpebral ligament
insertion - lateral palpebral ligament

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19
Q

what are the actions of the palpebral part of the orbicularis occuli?

A

gently closes eyelids

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20
Q

what are the origins and insertions of the lacrimal part of the orbicularis occuli?

A

origin - lacrimal bone
insertions - lacrimal sac

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21
Q

what are the actions of the lacrimal part of the orbicularis occuli?

A

opens lacrimal sac so tears can fall down into the nasal cavity

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22
Q

what are the origins and insertions of the corrugator supercilii?

A
  • origins - glabella
  • insertions - skin of the eyebrow
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23
Q

what are the actions of the corrugator supercilii?

A

pulls eyebrows medially and inferiorly forming vertical lines of frowning

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24
Q

what is the glabella?

A

smooth part of forehead above and between the eyebrows

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25
Q

where is the corrugator supercilii located?

A

posteriorly to the orbicularis oculi

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26
Q

what are the 3 eyebrows surrounding the eye opening?

A
  • corrugator supercilii
  • procerus muscle
  • orbicularis occuli
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27
Q

label this muscle

A
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28
Q

what is this muscle?

A

procerus

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29
Q

what is this muscle?

A

corrugator supercilii

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30
Q

what are the origins and insertions of the zygomaticus major?

A
  • origin - zygomatic bone
  • insertion - skin at angle of the mouth
31
Q

what is the action of teh zygomaticus major?

32
Q

what are the origins and insertions of the risorius?

A

origin - masseteric fascia
insertions - skin at the angle of the mouth

33
Q

what is the action of the risorius?

34
Q

what is the origin and insertion of the zygomaticus minor?

A

origin - zygomatic bone
insertion - skin at the angle of the mouth

35
Q

what is the action of the zygomaticus minor?

36
Q

what is the origin and insertion of the levator labii superioris?

A

origin - infraorbital margin of the maxilla
insertion - skin of the upper lip

37
Q

what is the action of the levator labii superioris?

A

lifts the angle of the mouth

38
Q

what are the origins and insertions of the levator anguli oris?

A

origin - anterior surface of maxilla
insertion - skin at the angle of the mouth

39
Q

what is the action of the levator anguli oris?

A

lifts the angle of the mouth

40
Q

what is the origin and insertions of the depressor anguli oris?

A

origin - base of mandible
insertion - skin at the angle of the mouth

41
Q

what is the action of the depressor anguli oris?

A

depresses the angle of the mouth

42
Q

what are the origins and insertions of the depressor labii inferioris?

A

origins - base of mandible
insertions - skin of the lower lip

42
Q

what are the actions of the depressor labii inferioris?

A

depresses the angle of the mouth

43
Q

what are the origins and insertions of the buccinator?

A

origin - alveolar process of maxilla and mandible
insertions - skin at the angle of the mouth

44
Q

what are the actions of the buccinator?

A
  • pulls cheeks inwards to prevent food accumulation
45
Q

what are the origins and insertions of the orbicularis oris?

A

origin - maxilla + other muscles of the cheek
insertion - skin + mucous membranes of the lips

46
Q

what is the action of the orbicularis oris?

A

closes lips to narrow oral opening

47
Q

what are the origins and insertions of the mentalis?

A

origin - alveolar process of mandibula
insertion - skin of the chin

48
Q

what are the actions of the mentalis?

A

pulls skin upwards and creates expression of doubt

49
Q

what are the origins and insertions of the platysma?

A

origins - skin/fascia of infra and supraclavicular regions
insertions - lower border of mandible

50
Q

what are the actions of the platysma?

A
  • depresses mandible + mouth
  • tenses skin of lower face and anterior neck
51
Q

label these muscles

52
Q

label these muscles

53
Q

label these muscles

54
Q

label these muscles

55
Q

label these muscles

56
Q

label these muscles

57
Q

what are the origins and insertions of the levator labii superioris alaeque nasi?

A

origins - fronatl process of maxilla
insertions - skin of upper lip + skin of nasal wing

58
Q

what are the actions of the levator labii superioris alaeque nasi?

A

dilates nostrils and elevates upper lip

59
Q

what are the origins and insertions of the nasalis (transverse and alar)?

A

origin - anterior surface of maxilla
insertions - dorsal cartilage of nose

60
Q

what are the actions of the nasalis?

A

transverse - constricts nostrils
alar - dilates nostrils

61
Q

what are the origins and insertions of the depressor septi nasi?

A

origin - maxilla (above medial incisor tooth)
insertions - nasal septum

62
Q

what are the actions of the depressor septi nasi?

A

pulls nasal septum inferiorly to widen the nasal opening

63
Q

what are the 3 extrinsic muscles of the ear?

A
  • auricularis superior
  • auricularis posterior
  • auriculari anterior
64
Q

what are the origins and insertions of the auricularis superior?

A

origin - epicranial aponeurosis
insertion - auricle

65
Q

what is the action of the auricularis superior?

A

movement of auricle superiorly

65
Q

what are the origins and insertions of the auricularis posterior?

A

origin - temporal bone
insertion - auricle

66
Q

what are the actions of the auricularis posterior?

A

movement of auricle posteriorly

67
Q

what are the origins and insertions of the auricularis anterior?

A

origin - temporal fascia
insertion - auricle

68
Q

what are the actions of the auricularis anterior?

A

movement of the auricle anteriorly

69
Q

label these muscles

70
Q

label these muscles

71
Q

label these muscles

Med School Yr 2 (96 decks)

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