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Anatomy Head & Face > Muscles > Flashcards

Muscles Flashcards

0
Q

Occipitofrontalis action

A

Raise eyebrows and wrinkle forehead

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1
Q

Orbicularis oculi action

A

Close eyelids and winking

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2
Q

Corrugator supercili action

A

Draws eyebrows medially and inferiorly, creating Vertical wrinkles above nose

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3
Q

Nasalis action

A

Compress bridge, depresses tip of nose, elevates corners of nostrils. “Flaring”

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4
Q

Orbicularis oris action

A

Puckering of the lips for kissing and blowing

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5
Q

Levator labii superioris action

A

Elevates the upper lip for elevation; shows sadness (deepening of nasolabial sulcus

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6
Q

levator labii superioris alaeque nasi action

A

Dilates the nostrils and elevates the upper lip

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7
Q

Procerus action

A

Draws down medial angle of eyebrow for frowning expressions

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8
Q

Zygomaticus major action

A

Shows expressions of happiness and sneering (disdain)

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9
Q

Zygomaticus minor action

A

Expressions of sadness via nasolabial sulcus deepening

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10
Q

Buccinator action

A

Resists dissension when blowing, presses cheek against molars to keep food in mouth

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11
Q

Levator anguli oris action

A

Part of dilators of mouth; widens oral fissure when grinning or grimacing

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12
Q

Risorius action

A

Dilator of mouth; depresses labial commisure to frown

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13
Q

Depressor anguli oris action

A

Dilator of mouth; depresses labial commisure to frown

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14
Q

Depressor labii inferioris action

A

Dilator of mouth; depresses lower lip (pouting, sadness)

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15
Q

Mentalis action

A

Elevates and protrudes lower lip; elevates skin of shin (showing doubt)

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16
Q

Platysma action

A

Depresses mandible; tenses skin of inferior face and neck (conveys stress and tension)

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17
Q

Levator Palpebrae Superioris Innervation

A

Occulomotor (CN III); deep layer (superior tarsal muscle) is supplied by sympathetic fibers

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18
Q

Levator Palpebrae Superioris action

A

elevates superior eyelid

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19
Q

Superior Oblique innervation

A

Trochlear Nerve (CN IV)

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20
Q

Superior Oblique action

A

abducts, depresses and medially rotates eyeball

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21
Q

Inferior Oblique Innervation

A

Oculomotor Nerve (CN III)

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22
Q

Inferior Oblique Action

A

Abducts, elevates and laterally rotates eyeball

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23
Q

Superior Rectus innervation

A

Oculomotor Nerve (CNIII)

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24
Q

Superior Rectus Action

A

Elevates adducts, and medially rotates eyeball

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25
Q

Inferior Rectus innervation

A

Oculomotor Nerve (CN III)

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26
Q

Inferior Rectus action

A

depresses, adducts and laterally rotates eyeball

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27
Q

Medial Rectus innervation

A

Oculomotor Nerve (CN III)

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28
Q

Medial Rectus action

A

Adducts eyeball

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29
Q

Lateral Rectus innervation

A

Abducent Nerve (CN VI)

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30
Q

Lateral Rectus action

A

abducts eyeball

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31
Q

Temporalis innervation

A

Anterior trunk of mandibular nerve (CN V3)

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32
Q

Temporalis action

A

elevates mandible, closes jaws, posterior, more horizontal fibers are 1° retractors of mandible.

33
Q

Masseter innervation

A

anterior trunk of mandibular nerve (CN V3)

34
Q

Masseter action

A

elevates mandible, closes jaws, superficial fibers make limited contribution to protrusion of mandible

35
Q

Lateral Pterygoid innervation

A

Anterior trunk of mandibular nerve (CN V3)

36
Q

Lateral Pterygoid action

A

acting bilaterally, protracts mandible and depresses chin; acting unilaterally, swings jaw toward contralateral side; alternate unilateral contraction produces larger lateral chewing movements

37
Q

Medial Pterygoid innervation

A

anterior trunk of mandibular nerve (CN V3) via medial pterygoid nerve

38
Q

Medial Pterygoid action

A

acts synergistically with masseter to elevate mandible; contributes to protrusion; produces small grinding movements.

39
Q

Digastric innervation

A

facial and mandibular nerves

40
Q

Digastric action

A

depresses mandible against resistance when infrahyoid muscles fix or depress hyoid.

41
Q

stylohyoid innervation

A

facial nerve

42
Q

Mylohyoid innervation

A

mandibular nerve

43
Q

Mylohyoid action

A

depresses mandible against resistance when infrahyoid muscles fix or depress hyoid bone

44
Q

Geniohyoid innervation

A

nerve to geniohyoid (C1-C2)

45
Q

Geniohyoid action

A

depresses mandible against resistance when infrahyoid muscles fix or depress hyoid bone.

46
Q

Omohyoid Innervation

A

Ansa Cervicalis from cervical plexus (C1-C3)

47
Q

Omohyoid action

A

fixes or depresses hyoid bone

48
Q

Sternohyoid innervation

A

Ansa cervicalis from cervical plexus (C1-C3)

49
Q

Sternohyoid action

A

fixes or depresses hyoid

50
Q

Sternothyroid innervation

A

Ansa cervicalis from cervical plexus (C1-C3)

51
Q

Sternothyroid action

A

fixes or depresses hyoid bone

52
Q

Thyrohyoid innervation

A

C1 (via hypoglossal n. CN XII)

53
Q

Thyrohyoid action

A

fixes or depresses hyoid bone

54
Q

Platysma innervation

A

Cervical branch of facial nerve (CN VII)

55
Q

Platysma action

A

depresses mandible against resistance

56
Q

Tensor veli palatini innervation

A

Medial pterygoid nerve (a branch of mandibular nerve, CN V3) via otic ganglion

57
Q

Tensor veli palatini action

A

tenses soft palate and opens mouth of pharyngotympanic tube during swallowing and yawning

58
Q

Levator veli palatini innervation

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

59
Q

Levator veli palatini action

A

elevates soft palate during swallowing and yawning

60
Q

Palatoglossus innervation

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

61
Q

Palatoglossus action

A

elevates posterior part of tongue and draws soft palate onto tongue

62
Q

Palatopharyngeus innervation

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

63
Q

Palatopharyngeus action

A

tenses soft palate and pulls walls of pharynx superiorly, anteriorly and medially during swallowing

64
Q

Musculus uvulae innervation

A

pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

65
Q

Hyoglossus action

A

depresses tongue, especially pulling its side inferiorly, helps shorten tongue.

66
Q

Styloglossus action

A

retrudes tongue and curls its sides, working with genioglossus to form a central trough during swallowing.

67
Q

SCM innervation

A

Spinal Accessory nerve (CN XI,motor); C2 and C3 nerves (pain and proprioception)

68
Q

SCM action

A

Tilts head towards opposite side; flexes cervical vertebra so chin draws down towards manubrium

69
Q

Longus Colli innervation

A

anterior rami of C2-C6 spinal nerves

70
Q

Longus Colli action

A

flexes neck with rotation to opposite side if acting unilaterally

71
Q

Longus Capitis innervation

A

anterior rami of C1-C3 spinal nerves

72
Q

Longus Capitis action

A

flexes the head

73
Q

Rectus capitis lateralis innervation

A

branches from loop between C1 and C2 spinal nerves

74
Q

Rectus capitis lateralis action

A

flexes and stabilizes head

75
Q

Scalenus Medius innervation

A

anterior rami of cervical spinal nerves

76
Q

Scalenus Medius action

A

lateral neck flexion and elevation of 1st rib during forced inspiration

77
Q

Scalenus Posterior innervation

A

Anterior rami of cervical spinal nerves C7 & C8

78
Q

Scalenus Posterior action

A

Lateral neck flexion and elevation of 2nd rib during forced inspiration

79
Q

Scalenus Anterior innervation

A

cervical spinal nerves C4-C6

80
Q

Scalenus Anterior action

A

flexes head

Anatomy Head & Face (1 decks)

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