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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
where is the corrugator supercilii located?
posteriorly to the orbicularis oculi
26
what are the 3 eyebrows surrounding the eye opening?
* corrugator supercilii * procerus muscle * orbicularis occuli
27
label this muscle
28
what is this muscle?
procerus
29
what is this muscle?
corrugator supercilii
30
what are the origins and insertions of the zygomaticus major?
* origin - zygomatic bone * insertion - skin at angle of the mouth
31
what is the action of teh zygomaticus major?
smiling
32
what are the origins and insertions of the risorius?
origin - masseteric fascia insertions - skin at the angle of the mouth
33
what is the action of the risorius?
smiling
34
what is the origin and insertion of the zygomaticus minor?
origin - zygomatic bone insertion - skin at the angle of the mouth
35
what is the action of the zygomaticus minor?
smiling
36
what is the origin and insertion of the levator labii superioris?
origin - infraorbital margin of the maxilla insertion - skin of the upper lip
37
what is the action of the levator labii superioris?
lifts the angle of the mouth
38
what are the origins and insertions of the levator anguli oris?
origin - anterior surface of maxilla insertion - skin at the angle of the mouth
39
what is the action of the levator anguli oris?
lifts the angle of the mouth
40
what is the origin and insertions of the depressor anguli oris?
origin - base of mandible insertion - skin at the angle of the mouth
41
what is the action of the depressor anguli oris?
depresses the angle of the mouth
42
what are the origins and insertions of the depressor labii inferioris?
origins - base of mandible insertions - skin of the lower lip
42
what are the actions of the depressor labii inferioris?
depresses the angle of the mouth
43
what are the origins and insertions of the buccinator?
origin - alveolar process of maxilla and mandible insertions - skin at the angle of the mouth
44
what are the actions of the buccinator?
* pulls cheeks inwards to prevent food accumulation
45
what are the origins and insertions of the orbicularis oris?
origin - maxilla + other muscles of the cheek insertion - skin + mucous membranes of the lips
46
what is the action of the orbicularis oris?
closes lips to narrow oral opening
47
what are the origins and insertions of the mentalis?
origin - alveolar process of mandibula insertion - skin of the chin
48
what are the actions of the mentalis?
pulls skin upwards and creates expression of doubt
49
what are the origins and insertions of the platysma?
origins - skin/fascia of infra and supraclavicular regions insertions - lower border of mandible
50
what are the actions of the platysma?
* depresses mandible + mouth * tenses skin of lower face and anterior neck
51
label these muscles
52
label these muscles
53
label these muscles
54
label these muscles
55
label these muscles
56
label these muscles
57
what are the origins and insertions of the levator labii superioris alaeque nasi?
origins - fronatl process of maxilla insertions - skin of upper lip + skin of nasal wing
58
what are the actions of the levator labii superioris alaeque nasi?
dilates nostrils and elevates upper lip
59
what are the origins and insertions of the nasalis (transverse and alar)?
origin - anterior surface of maxilla insertions - dorsal cartilage of nose
60
what are the actions of the nasalis?
transverse - constricts nostrils alar - dilates nostrils
61
what are the origins and insertions of the depressor septi nasi?
origin - maxilla (above medial incisor tooth) insertions - nasal septum
62
what are the actions of the depressor septi nasi?
pulls nasal septum inferiorly to widen the nasal opening
63
what are the 3 extrinsic muscles of the ear?
* auricularis superior * auricularis posterior * auriculari anterior
64
what are the origins and insertions of the auricularis superior?
origin - epicranial aponeurosis insertion - auricle
65
what is the action of the auricularis superior?
movement of auricle superiorly
65
what are the origins and insertions of the auricularis posterior?
origin - temporal bone insertion - auricle
66
what are the actions of the auricularis posterior?
movement of auricle posteriorly
67
what are the origins and insertions of the auricularis anterior?
origin - temporal fascia insertion - auricle
68
what are the actions of the auricularis anterior?
movement of the auricle anteriorly
69
label these muscles
70
label these muscles
71
label these muscles

Med School Yr 2 (96 decks)

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