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Exam 3 Gross > Muscles of Anterior neck and Superficial Face > Flashcards

Muscles of Anterior neck and Superficial Face Flashcards

1
Q

Insertion of Platysma

A

Mandible (inferior border)

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2
Q

Innervation of Platysma

A

Cervical branch of Facial n. (CN VII)

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3
Q

Action of Platysma

A

Depresses and wrinkles skin of lower face and mouth, tenses skin of neck, aids forced depression of mandible

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4
Q

What are the 4 suprahyoid muscles?

A

Digastric (Anterior and Posterior belly)
Stylohyoid
Mylohyoid
Geniohyoid

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5
Q

Origin of Digastric muscle (anterior belly)

A

Mandible (digastric fossa)

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6
Q

Insertion of Digastric muscle (anterior belly)

A

Hyoid bone

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7
Q

Innervation of Digastric (anterior belly)

A

Mylohyoid n. (from CN V3)

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8
Q

Origin of Digastric muscle (posterior belly)

A

Temporal bone (mastoid notch medial to mastoid process)

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9
Q

Insertion of Digastric muscle (posterior belly)

A

Hyoid bone

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10
Q

Innervation of Digastric muscle (posterior muscle)

A

Facial n. (CN VII)

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11
Q

Action of entire Digastric muscle

A

Elevates hyoid bone (during swallowing), assists in opening mandible

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12
Q

Origin of Stylohyoid

A

Temporal bone (styloid process)

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13
Q

Insertion of Stylohyoid

A

hyoid bone

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14
Q

Innervation of Stylohyoid

A

Facial n. (CN VII)

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15
Q

Action of Stylohyoid muscle

A

Elevates hyoid bone (during swallowing), assists in opening mandible

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16
Q

Origin of Mylohyoid

A

Mandible (mylohyoid line)

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17
Q

Insertion of Mylohyoid

A

hyoid bone

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18
Q

Innervation of Mylohyoid

A

Mylohyoid n. (from CN V3)

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19
Q

Action of Mylohyoid

A

Tightens and elevates oral floor, draws hyoid bone forward (swallowing), assists in opening mandible and moving it side to side (mastication)

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20
Q

Origin of Geniohyoid muscle

A

Mandible

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21
Q

Insertion of Geniohyoid

A

hyoid bone

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22
Q

Innervation of Geniohyoid

A

Hypoglossal n. (CN XII)

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23
Q

Action of Geniohyoid

A

Draws hyoid bone forward (swallowing), assists in opening mandible

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24
Q

What are your 4 infrahyoid muscles?

A

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

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25
Origin of Omohyoid
Scapula (superior border)
26
Insertion of Omohyoid
hyoid bone
27
Innervation of Omohyoid
Ansa cervicallis of cervical plexus (C1-C3)
28
Action of Omohyoid
Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing
29
Origin of Sternohyoid
Manubrium and sternoclavicular joint (posterior surface)
30
Insertion of Sternohyoid
Hyoid bone
31
Innervation of Sternohyoid
Ansa cervicalis of cervical plexus (C1-C3)
32
Action of Sternohyoid
Depresses hyoid bone, draws larynx and hyoid down for phonation and terminal phases of swallowing
33
Origin of Sternothyroid
Manubrium (posterior surface)
34
Insertion of Sternothyroid
Thyroid cartilage
35
Innervation of Sternothyroid
Ansa cervicalis (C2-C3)
36
Action of Sternothyroid
Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing
37
Origin of Thyrohyoid
Thyroid cartilage
38
Insertion of Thyrohyoid
hyoid bone
39
Innervation of Thyrohyoid
Hypoglossal n. (CN XII)
40
Action of Thyrohyoid
Depresses and fixes hyoid, raises the larynx during swallowing
41
What are the muscles of mastication
Masseter Temporalis Lateral Pterygoid Medial Pterygoid
42
Origin of Masseter (superficial head)
zygomatic arch (anterior two thirds)
43
Insertion of Masseter
Mandibular angle (masseteric tuberosity)
44
Innervation of Masseter
Mandibular n. (CN V3) via masseteric n.
45
Action of Masseter
Adducts and protrudes mandible
46
Origin of Masseter (deep head)
zygomatic arch (posterior one third)
47
Origin of Temporalis
Temporal fossa (inferior temporal line)
48
Insertion of Temporalis
Coronoid process of mandible (apex and medial surface)
49
Innervation of Temporalis
Mandibular n. (CN V3) via deep temporal nn.
50
Action of Temporalis
Vertical fibers: Adduct mandible Horizontal fibers: retracts mandible Unilateral: Lateral movement of mandible (chewing)
51
Origin of Lateral Pterygoid (superior head)
Greater wing of sphenoid bone (infratemporal crest)
52
Insertion of Lateral Pterygoid (superior head)
Temporalmandibular joint (articular disk)
53
Innervation of Lateral Pterygoid
Mandibular n. (CN V3) via lateral pterygoid n.
54
Action of Lateral Pterygoid
Bilateral: protrudes mandible (pulls articular disk forward) Unilateral: Lateral movements of mandible (chewing)
55
Origin of Lateral Pterygoid (inferior head)
Lateral pterygoid plate (lateral surface)
56
Insertion of Lateral Pterygoid (inferior head)
Mandible (condylar process)
57
Origin of Medial Pterygoid (superficial head)
Maxilla (tuberosity)
58
Insertion of Medial Pterygoid
Pterygoid tuberosity on medial surface of the mandibular angle
59
Innervation of Medial Pterygoid
Mandibular n. (CN V3) via medial pterygoid n.
60
Action of Medial Pterygoid
Adducts mandible
61
Origin of Medial Pterygoid (deep head)
Medial surface of lateral pterygoid plate and pterygoid fossa
62
Action of Occipitofrontalis
Elevates eyebrows, wrinkles skin of forehead
63
Action of Orbicularis oculi
Acts as orbital sphincter (closes eyelids)
64
Action of Orbicularis oris
Acts as oral sphincter - compresses and protrudes lips - resists distension
65
Action of Buccinator
-presses cheek against molar teeth, working with tongue to keep food between occlusal surfaces and out of oral vestibule -expels air from oral cavity/resists distension when blowing Unilateral: Draws mouth to one side
66
Origin of Platysma
Skin over lower neck and upper lateral thorax

Exam 3 Gross (7 decks)

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