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Human Anatomy 2 > Muscles Of Head And Face (2) > Flashcards

Muscles Of Head And Face (2) Flashcards

1
Q

What is the function of the occipitofrontalis front belly?

A

Elevates eyebrows

Wrinkles skin on forehead

Protracts scalp (surprise/curiosity)

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2
Q

What is the innervation of the occipitofrontalis front belly?

A

Facial nerve

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3
Q

What is the function of the occipitofrontalis occipital belly?

A

Retracts scalp (increase effectiveness of front belly)

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4
Q

What is the innervation of the occipitofrontalis occipital belly?

A

Facial nerve

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5
Q

What is the function of the corrugator supercili?

A

Draws eyebrows medial/inferior

Creates wrinkles above nose (concern/worry)

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6
Q

What’s the innervation of the corrugator supercili?

A

Facial nerve

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7
Q

What is the function of the procerus?

A

Depresses medial eyebrow

Wrinkles skin over nose (dislike)

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8
Q

What is the innervation of the procerus?

A

Facial nerve

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9
Q

What is the function of the nasalis?

A

Depresses Ala laterally

Helps elevate upper lip

Flares nostrils (anger)

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10
Q

What is the function of the orbicularis oculi?

A

Closes eyelids

Palpebral part does this gently

Orbital part does this tightly

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11
Q

What is the innervation of the orbicularis oculi?

A

Facial nerve

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12
Q

What is the innervation of the nasalis?

A

Facial nerve

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13
Q

What is the function of the buccinator?

A

Presses cheek against molars

Works with tongue to keep food in occlusal surfaces

Resists distention (when blowing)

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14
Q

What is the innervation of the buccinator?

A

Facial nerve

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15
Q

What is the function of the risorius?

A

Dilates mouth

Frown (sad)

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16
Q

What is the innervation of the risorius?

A

Facial nerve

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17
Q

What is the function of the zygomaticus major?

A

Dilates mouth

Smile

Unilaterally (sneers, disdain)

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18
Q

What is the innervation of the zygomaticus major?

A

Facial nerve

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19
Q

What is the function of the zygomaticus minor?

A

Dilates mouth

Elevates and everts upper lip

Deepen nasolabial sulcus (sadness)

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20
Q

What is the innervation of the zygomaticus minor?

A

Facial nerve

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21
Q

What is the function of the levator labii superioris?

A

Dilates mouth

Elevates or everts upper lip

Deepen nasolabial sulcus (sad)

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22
Q

What is the innervation of the levator labii superioris?

A

Facial nerve

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23
Q

What is the function of the levator anguli oris?

A

Dilates mouth

Widens oral fissure (grin/grimace)

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24
Q

What is the innervation of the levator anguli oris?

A

Facial nerve

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25
Q

What is the function of the depressor anguli oris?

A

Dilates mouth

Frown

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26
Q

What is the innervation of the depressor anguli oris?

A

Facial nerve

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27
Q

What is the function of the depressor labii inferioris?

A

Dilates mouth

Depresses or everts lower lip (pouting)

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28
Q

What is the innervation of the depressor labii inferioris?

A

Facial nerve

29
Q

What’s the function of the mentalis?

A

Elevates and protrudes lower lip

Elevates skin of chin (showing doubt)

30
Q

What is the innervation of the mentalis?

A

Facial nerve

31
Q

What is the function of the platysma?

A

Draw corners of mouth inferiorly

Tightens skin of neck during clenching

Widens mouth during sadness or fright

32
Q

What is the innervation of the platysma?

A

Facial nweve

33
Q

What is the function of the temporalis?

A

Elevates mandible

Closes jaw

Posterior fibers partially contribute to retraction

34
Q

What is the innervation of the temporalis?

A

Trigeminal nerve of mandibular branch

35
Q

What is the function of the masseter?

A

Elevates mandible

Closes jaw

Superficial fibers contribute to protrusion

36
Q

What’s the innervation of the masseter?

A

Trigeminal nerve of mandibular branch

37
Q

What is the bilateral function of the lateral pterygoid?

A

Protracts mandible and depresses chin

38
Q

What is the unilateral function of the lateral pterygoid?

A

Swings jaw to contralateral side

39
Q

What is the innervation of the lateral pterygoid?

A

Trigeminal nerve of mandibular branch

40
Q

What do alternating movements of the lateral pterygoid cause?

A

Larger lateral chewing movements

41
Q

What does the medial pterygoid act synergistically with?

A

Masseter to elevate mandible

42
Q

What does the medial pterygoid contribute to?

A

Protrusion

43
Q

What does alternating activity of the medial pterygoid create?

A

Smaller grinding movements

44
Q

What is the innervation of the medial pterygoid?

A

Trigeminal nerve of mandibular branch

45
Q

Orbicularis meaning

46
Q

Anguli meaning

A

Pull at an angle (corner)

47
Q

What are the muscles of mastication?

A

Temporalis (anterior, middle, posterior)

Lateral pterygoid

Medial pterygoid

Masseter

48
Q

What is the function of the anterior and middle temporalis?

A

Elevate the mandible

49
Q

What is the function of the posterior temporalis?

A

Pulls mandible back in

50
Q

What is the function of the lateral pterygoid?

A

Champion at protruding the jaw

51
Q

What are the two heads of the lateral pterygoid?

A

Superior and inferior heads

52
Q

What does the medial pterygoid attach to?

A

Lateral pterygoid plate

53
Q

What muscle contributes to the ipsilateral side in lateral deviation?

A

Temporalis

54
Q

What muscle contributes to the contralateral side in lateral deviation?

A

Masseter

Medial pterygoid

Lateral pterygoid

55
Q

Contraction of the right upper trapezius (descending fibers) will create what?

A

Ipsilateral lateral flexion

Contralateral rotation

56
Q

What are the movements of the moving scapula in the upper trapezius?

A

Upward rotation

Elevation

57
Q

What are the movements of the moving neck in the upper trapezius?

A

Extension

Ipsilateral lateral flexion

Contralateral rotation

58
Q

What are the movements of the moving scapula in the levator scapulae?

A

Downward rotation

Elevation

59
Q

What are the movements of the moving neck in the levator scapulae?

A

Extension

Ipsilateral lateral flexion

Ipsilateral rotation

60
Q

What results in bilateral concentric contraction of the sternocleidomastoid?

A

Upper cervical extension with lower cervical flexion

61
Q

What do Suprahyoids aid in?

A

Swallowing

62
Q

What are the suprahyoids?

A

Digastric, geniohyoid, mylohyoid, stylohyoid,

63
Q

What do the suprahyoids do?

A

Elevate hyoid

(Digastric can help depress mandible)

64
Q

What are the infrahyoids?

A

Omohyoid, sternohyoid, thyrohyoid, sternothyroid

65
Q

What do the infrahyoids do?

A

Depress the hyoid

66
Q

What muscle help with depression?

A

Lateral pterygoid

Digastric

Platysma

67
Q

What muscles help with elevation?

A

Temporalis

Masseter

Medial pterygoid

68
Q

What muscles help with protrusion?

A

Lateral pterygoid

Masseter

Medial pterygoid

69
Q

What muscles help with retrusion?

A

Temporalis (posterior fibers)

Human Anatomy 2 (20 decks)

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