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

Muscles Of Head And Face (2) Flashcards

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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
What is the function of the depressor anguli oris?
Dilates mouth Frown
26
What is the innervation of the depressor anguli oris?
Facial nerve
27
What is the function of the depressor labii inferioris?
Dilates mouth Depresses or everts lower lip (pouting)
28
What is the innervation of the depressor labii inferioris?
Facial nerve
29
What’s the function of the mentalis?
Elevates and protrudes lower lip Elevates skin of chin (showing doubt)
30
What is the innervation of the mentalis?
Facial nerve
31
What is the function of the platysma?
Draw corners of mouth inferiorly Tightens skin of neck during clenching Widens mouth during sadness or fright
32
What is the innervation of the platysma?
Facial nweve
33
What is the function of the temporalis?
Elevates mandible Closes jaw Posterior fibers partially contribute to retraction
34
What is the innervation of the temporalis?
Trigeminal nerve of mandibular branch
35
What is the function of the masseter?
Elevates mandible Closes jaw Superficial fibers contribute to protrusion
36
What’s the innervation of the masseter?
Trigeminal nerve of mandibular branch
37
What is the bilateral function of the lateral pterygoid?
Protracts mandible and depresses chin
38
What is the unilateral function of the lateral pterygoid?
Swings jaw to contralateral side
39
What is the innervation of the lateral pterygoid?
Trigeminal nerve of mandibular branch
40
What do alternating movements of the lateral pterygoid cause?
Larger lateral chewing movements
41
What does the medial pterygoid act synergistically with?
Masseter to elevate mandible
42
What does the medial pterygoid contribute to?
Protrusion
43
What does alternating activity of the medial pterygoid create?
Smaller grinding movements
44
What is the innervation of the medial pterygoid?
Trigeminal nerve of mandibular branch
45
Orbicularis meaning
Circle
46
Anguli meaning
Pull at an angle (corner)
47
What are the muscles of mastication?
Temporalis (anterior, middle, posterior) Lateral pterygoid Medial pterygoid Masseter
48
What is the function of the anterior and middle temporalis?
Elevate the mandible
49
What is the function of the posterior temporalis?
Pulls mandible back in
50
What is the function of the lateral pterygoid?
Champion at protruding the jaw
51
What are the two heads of the lateral pterygoid?
Superior and inferior heads
52
What does the medial pterygoid attach to?
Lateral pterygoid plate
53
What muscle contributes to the ipsilateral side in lateral deviation?
Temporalis
54
What muscle contributes to the contralateral side in lateral deviation?
Masseter Medial pterygoid Lateral pterygoid
55
Contraction of the right upper trapezius (descending fibers) will create what?
Ipsilateral lateral flexion Contralateral rotation
56
What are the movements of the moving scapula in the upper trapezius?
Upward rotation Elevation
57
What are the movements of the moving neck in the upper trapezius?
Extension Ipsilateral lateral flexion Contralateral rotation
58
What are the movements of the moving scapula in the levator scapulae?
Downward rotation Elevation
59
What are the movements of the moving neck in the levator scapulae?
Extension Ipsilateral lateral flexion Ipsilateral rotation
60
What results in bilateral concentric contraction of the sternocleidomastoid?
Upper cervical extension with lower cervical flexion
61
What do Suprahyoids aid in?
Swallowing
62
What are the suprahyoids?
Digastric, geniohyoid, mylohyoid, stylohyoid,
63
What do the suprahyoids do?
Elevate hyoid (Digastric can help depress mandible)
64
What are the infrahyoids?
Omohyoid, sternohyoid, thyrohyoid, sternothyroid
65
What do the infrahyoids do?
Depress the hyoid
66
What muscle help with depression?
Lateral pterygoid Digastric Platysma
67
What muscles help with elevation?
Temporalis Masseter Medial pterygoid
68
What muscles help with protrusion?
Lateral pterygoid Masseter Medial pterygoid
69
What muscles help with retrusion?
Temporalis (posterior fibers)

Human Anatomy 2 (20 decks)

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