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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
Q

Origin of Omohyoid

A

Scapula (superior border)

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26
Q

Insertion of Omohyoid

A

hyoid bone

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27
Q

Innervation of Omohyoid

A

Ansa cervicallis of cervical plexus (C1-C3)

28
Q

Action of Omohyoid

A

Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing

29
Q

Origin of Sternohyoid

A

Manubrium and sternoclavicular joint (posterior surface)

30
Q

Insertion of Sternohyoid

A

Hyoid bone

31
Q

Innervation of Sternohyoid

A

Ansa cervicalis of cervical plexus (C1-C3)

32
Q

Action of Sternohyoid

A

Depresses hyoid bone, draws larynx and hyoid down for phonation and terminal phases of swallowing

33
Q

Origin of Sternothyroid

A

Manubrium (posterior surface)

34
Q

Insertion of Sternothyroid

A

Thyroid cartilage

35
Q

Innervation of Sternothyroid

A

Ansa cervicalis (C2-C3)

36
Q

Action of Sternothyroid

A

Depresses hyoid, draws larynx and hyoid down for phonation and terminal phases of swallowing

37
Q

Origin of Thyrohyoid

A

Thyroid cartilage

38
Q

Insertion of Thyrohyoid

A

hyoid bone

39
Q

Innervation of Thyrohyoid

A

Hypoglossal n. (CN XII)

40
Q

Action of Thyrohyoid

A

Depresses and fixes hyoid, raises the larynx during swallowing

41
Q

What are the muscles of mastication

A

Masseter
Temporalis
Lateral Pterygoid
Medial Pterygoid

42
Q

Origin of Masseter (superficial head)

A

zygomatic arch (anterior two thirds)

43
Q

Insertion of Masseter

A

Mandibular angle (masseteric tuberosity)

44
Q

Innervation of Masseter

A

Mandibular n. (CN V3) via masseteric n.

45
Q

Action of Masseter

A

Adducts and protrudes mandible

46
Q

Origin of Masseter (deep head)

A

zygomatic arch (posterior one third)

47
Q

Origin of Temporalis

A

Temporal fossa (inferior temporal line)

48
Q

Insertion of Temporalis

A

Coronoid process of mandible (apex and medial surface)

49
Q

Innervation of Temporalis

A

Mandibular n. (CN V3) via deep temporal nn.

50
Q

Action of Temporalis

A

Vertical fibers: Adduct mandible
Horizontal fibers: retracts mandible
Unilateral: Lateral movement of mandible (chewing)

51
Q

Origin of Lateral Pterygoid (superior head)

A

Greater wing of sphenoid bone (infratemporal crest)

52
Q

Insertion of Lateral Pterygoid (superior head)

A

Temporalmandibular joint (articular disk)

53
Q

Innervation of Lateral Pterygoid

A

Mandibular n. (CN V3) via lateral pterygoid n.

54
Q

Action of Lateral Pterygoid

A

Bilateral: protrudes mandible (pulls articular disk forward)
Unilateral: Lateral movements of mandible (chewing)

55
Q

Origin of Lateral Pterygoid (inferior head)

A

Lateral pterygoid plate (lateral surface)

56
Q

Insertion of Lateral Pterygoid (inferior head)

A

Mandible (condylar process)

57
Q

Origin of Medial Pterygoid (superficial head)

A

Maxilla (tuberosity)

58
Q

Insertion of Medial Pterygoid

A

Pterygoid tuberosity on medial surface of the mandibular angle

59
Q

Innervation of Medial Pterygoid

A

Mandibular n. (CN V3) via medial pterygoid n.

60
Q

Action of Medial Pterygoid

A

Adducts mandible

61
Q

Origin of Medial Pterygoid (deep head)

A

Medial surface of lateral pterygoid plate and pterygoid fossa

62
Q

Action of Occipitofrontalis

A

Elevates eyebrows, wrinkles skin of forehead

63
Q

Action of Orbicularis oculi

A

Acts as orbital sphincter (closes eyelids)

64
Q

Action of Orbicularis oris

A

Acts as oral sphincter

  • compresses and protrudes lips
  • resists distension
65
Q

Action of Buccinator

A

-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
Q

Origin of Platysma

A

Skin over lower neck and upper lateral thorax

Exam 3 Gross (7 decks)

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