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Clinical Anatomy I > Exam 2: Muscles > Flashcards

Exam 2: Muscles Flashcards

1
Q

external intercostal attachments

A

rib to rib, from superior-lateral to inferior-medial (down and in)

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2
Q

external intercostal actions

A

elevation of ribs

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3
Q

external intercostal innervation

A

intercostal nerve (segmental)

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4
Q

internal and innermost intercostal attachments

A

rib to rib, from superior-medial to inferior-lateral (down and out)

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5
Q

internal and innermost intercostal actions

A

depression of ribs

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6
Q

internal and innermost intercostal innervation

A

intercostal nerve (segmental)

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7
Q

transversus thoracis attachments

A

proximal - posterior sternum

distal - costal cartilages

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8
Q

transversus thoracis actions

A

depression of ribs

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9
Q

transversus thoracis innervation

A

intercostal nerves (segmental)

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10
Q

diaphragm attachments

A

proximal: xiphoid, inner surface of lower ribs and costal cartilages, lumbar vertebrae via crura
distal: central tendon

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11
Q

diaphragm actions

A

inspiration (negative thoracic pressure by inferior displacement)

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12
Q

diaphragm innervation

A

spinal: C3-C5
peripheral: phrenic nerve

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13
Q

rectus capitis posterior major attachments

A

proximal: spinous process C2
distal: lateral aspect of inferior nuchal line

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14
Q

rectus capitis posterior major innervation

A

suboccipital nerve

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15
Q

rectus capitis posterior minor attachments

A

proximal: tubercle of posterior arch of C1
distal: medial aspect of inferior nuchal line

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16
Q

rectus capitis posterior minor innervation

A

suboccipital n

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17
Q

inferior oblique (suboccipital) attachments

A

proximal: spinous process C2
distal: (inferior surface of) transverse process C1

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18
Q

inferior oblique (suboccipital) innervation

A

suboccipital n

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19
Q

superior oblique (suboccipital) attachments

A

proximal: (superior surface of) transverse process C1
distal: area between superior and inferior nuchal lines of occipital bone

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20
Q

superior oblique (suboccipital) innervation

A

suboccipital nerve

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21
Q

geniohyoid muscle innervation

A

ventral ramus of C1 via CN XII (hypoglossal n.)

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22
Q

stylohyoid muscle innervation

A

facial n. (CN VII)

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23
Q

mylohyoid muscle innervation

A

inferior alveolar n. of mandibular n. (V3) of trigeminal nerve

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24
Q

anterior belly of digastric m. innervation

A

inferior alveolar n. of mandibular n. (V3) of trigeminal nerve

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25
Q

posterior belly of digastric m. innervation

A

facial n. (CN VII)

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26
Q

sternohyoid m. innervation

A

ansa cervicalis C1-C3

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27
Q

superior and inferior bellies of omohyoid m. innervation

A

ansa cervicalis C1-C3

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28
Q

thyrohyoid m. innervation

A

ventral ramus of C1 via CN XII

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29
Q

what anterior neck muscles (3) are innervated by ansa cervicalis C1-C3?

A

superior and inferior bellies of omohyoid m. (infrahyoid)
sternohyoid m. (infrahyoid)
sternothyroid (infrahyoid)

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30
Q

what anterior neck muscles (2) are innervated by ventral ramus of C1 via CN XII?

A

Geniohyoid (suprahyoid)

Thyrohyoid (infrahyoid)

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31
Q

what anterior neck muscles (2) are innervated by facial nerve?

A

posterior belly of digastric m.

stylohyoid m.

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32
Q

What anterior neck muscles (2) are innervated by inferior alveolar nerve of mylohyoid nerve of trigeminal n (CN V3)?

A

anterior belly of digastric m. (suprahyoid)

mylohyoid m. (suprahyoid)

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33
Q

sternothyroid m. innervation

A

ansa cervicalis C1-C3

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34
Q

what muscles are distally attached to first rib?

A

anterior scalene - scalene tubercle of first rib

middle scalene - first rib

(note: posterior scalene is 2nd rib)

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35
Q

inferior oblique (extraocular) actions

A

elevation of eye
abduction of eye
extorsion of eye

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36
Q

inferior oblique (extarocular) innervation

A

inferior ramus of oculomotor nerve CN III

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37
Q

inferior rectus action

A

depression, adduction, and extorsion of eye

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38
Q

inferior rectus innervation

A

inferior ramus of oculomotor n. CN III

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39
Q

levagtor palpebrae superioris action

A

elevation of upper lid

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40
Q

levator palpebral superioris innervation

A

superior ramus of oculomotor n.

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41
Q

medial rectus innervation

A

inferior ramus of oculomotor n

42
Q

medial rectus action

A

adduction of eye

43
Q

superior rectus action

A

elevation, adduction, intorsion of eye

44
Q

superior rectus innervation

A

superior ramus of oculomotor n.

45
Q

lateral rectus action

A

abduction of eye

46
Q

lateral rectus innervation

A

abducens nerve CN VI

47
Q

superior oblique (extraocular) action

A

depression, abduction, intorsion of eye

48
Q

superior oblique (extraocular) innervation

A

trochlear n

49
Q

masseter attachments

A

proximal: zygomatic arch
distal: angle of mandible and lateral aspect ramus

50
Q

masseter actions

A

elevation of mandible (closing of mouth)
protraction/protrusion of mandible
retraction/retrusion (deep fibers) of mandible

*protrusion and retrusion is possible for this muscle because has two heads

51
Q

masseter innervation

A

masseteric nerve of mandibular nerve (V3)

52
Q

temporalis attachments

A

proximal: temporal fossa
distal: coronoid process and anterior border ramus of mandible

53
Q

temporalis actions

A

elevation of mandible
retraction (deep fibers) of mandible
ipsilateral lateral movement

54
Q

temporalis innervation

A

deep temporalis nerve of mandibular n (V3)

55
Q

lateral pterygoid attachments

A

proximal: lateral pterygoid plate and infratemporal surface of sphenoid bone (superior border of infratemporal fossa)
distal: TMJ disc, neck of mandible

56
Q

lateral pterygoid actions

A

depression of mandible
protraction/protrusion of mandible
contralateral lateral movement - acts with ipsilateral medial pterygoid to rotate mandible and produce chewing

57
Q

lateral pterygoid innervation

A

lateral pterygoid n. of mandibular n (CN V3)

58
Q

medial pterygoid attachments

A

proximal: medial surface of lateral pterygoid plate and adjacent maxilla
distal: medial aspect of angle of mandible

59
Q

medial pterygoid innervation

A

medial pterygoid n of mandibular n V3

60
Q

medial pterygoid actions

A

elevation of mandible
retrusion/retraction of mandible
contralateral lateral movement - works with ipsilateral lateral pterygoid to produce side-to-side movement of mandible (chewing)

61
Q

buccinator attachments

A

surrounds alveolar processes of maxilla and mandible to angle of mouth

62
Q

buccinator action and facial expression

A

action: compression of cheek

facial expression: blowing

63
Q

buccinator innervation

A

buccal branch of facial nerve (CN VII)

64
Q

depressor anguli oris attachments

A

mandible to angle of mouth

65
Q

depressor anguli oris action and facial expression

A

action: depress angle of mouth laterally

facial exp: frown, sadness

66
Q

depressor anguli oris innervation

A

mandibular and buccal branch of facial nerve VII

67
Q

depressor labii inferioris attachments

A

mandible to skin of lower lip

68
Q

depressor labii inferioris action and facial expression

A

action: depress lower lip

facial exp: pout, sadness

69
Q

depressor labii inferioris innervation

A

mandibular branch of facial nerve

70
Q

frontalis attachments

A

top of eyebrows to epicranial aponeurosis (midline of skull)

71
Q

frontalis actions and facial expression

A

action: protraction of scalp, elevation of eyebrows and nose

facial expression: surprise, curious

72
Q

nasalis attachments

A

maxilla that surrounds nasal cavity to bridge of nose and nostrils

73
Q

nasalis actions and facial expression

A

actions: transverse fibers compress, alar fibers widen nasal aperture
facial expressions: flare nostrils when angry or exerted

74
Q

nasalis innervation

A

buccal branch of facial nerve

75
Q

levator labbi superioris attachments

A

inferior aspect of orbit to top of upper medial lip

76
Q

levator labii superioris actions and facial expression

A

action: elevates upper lip

facial expression: sadness

77
Q

levator labii superioris innervation

A

buccal and zygomatic branches of facial n

78
Q

zygomaticus major attachments

A

zygomatic bone to angle of mouth

79
Q

zygomaticus major actions and facial expression

A

action: raises angle of mouth

facial expression: smile, happiness

80
Q

zygomaticus major innervation

A

zygomatic and buccal branches of facial nerve

81
Q

orbicularis oculi action and facial expression

A

action: palpebral sphincter

facial exp: close eye, wink

82
Q

orbicularis oculi innervation

A

temporal and zygomatic branches of facial n.

83
Q

orbicularis oris action and facial expression

A

action: oral sphincter

facial expression: kiss, close mouth

84
Q

orbicularis oris innervation

A

mandibular and buccal branches of facial nerve

85
Q

platysma attachments

A

lower border mandible to fascia overlying clavicle

86
Q

platysma action and facial expression

A

action: wrinkles anterior nuchal skin

facial exp: convey tension or stress (awk double chin face)

87
Q

platysma innervation

A

cervical branch of facial nerve

88
Q

craniofacial muscles innervated by buccal branch of facial nerve

A
  1. buccinator
  2. depressor anguli oris
  3. orbicularis oris
  4. levator labii
  5. nasalis
  6. zygomaticus major
89
Q

craniofacial muscles innervated by cervical branch of facial nerve

A

platysma

90
Q

craniofacial muscles innervated by temporal branch of facial nerve

A

frontalis

orbicularis oculi

91
Q

craniofacial muscles innervated by zygomatic branch of facial nerve

A
  1. zygomaticus major
  2. orbicularis oris
  3. levator labii superioris
92
Q

craniofacial muscles innervated by mandibular branch of facial nerve

A

depressor anguli oris
depressor labii inferioris
orbicularis oris

93
Q

craniofacial muscles of sadness

A

levator labii superioris
depressor anguli oris (frown)
depressor labii inferioris (pout)

94
Q

happiness/smile

A

zygomaticus major

95
Q

surprise/curious

A

frontalis

96
Q

kiss

A

orbicularis oris (close mouth)

97
Q

wink

A

orbicularis oculi

98
Q

convey stress/tension

A

platysma

99
Q

anger/exertion (via flaring of nostrils)

A

nasalis

100
Q

blow

A

buccinator

Clinical Anatomy I (9 decks)

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