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Anatomy Lab > Midterm OP (Muscles) > Flashcards

Midterm OP (Muscles) Flashcards

1
Q

Upper Trapezius Origin

A

EOP, Nuchal Line, Nuchal Ligament

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2
Q

Middle Trapezius Origin

A

SP’s of C7-T5

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3
Q

Lower Trapezius Origin

A

SP’s of T5-T12

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4
Q

Insertion of Trapezius

A

Lateral 1/3 of Clavicle
Acromion
Spine of Scapula

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5
Q

Action of Trapezius

A

Unilateral: Lateral flexion of head
Bilateral: Extension of head
Elevation of Scapula
Retraction of Scapula
Upward rotation of Scapula
Downward rotation of Scapula

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6
Q

Innervation of Trapezius

A

Spinal Accessory Nerve (CN XI)
Cervical Spinal n dorsal rami

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7
Q

What is the origin of the Levator Scapulae?

A

TPs of C1-C4

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8
Q

Where does the Levator Scapulae insert?

A

Medial border of scapula (superior part)

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9
Q

What is the action of the Levator Scapulae?

A

Elevation of scapula, extension and lateral flexion of neck

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10
Q

What is the innervation of the Levator Scapulae?

A

Dorsal scapular nerve

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11
Q

What is the origin of the Splenius Capitis?

A

SPs of C4-T4 and nuchal ligament

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12
Q

What is the insertion of the Splenius Capitis?

A

Mastoid process and superior nuchal line

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13
Q

What is the unilateral action of the Splenius Capitis?

A

Ipsilateral rotation and lateral flexion of head and neck

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14
Q

What is the bilateral action of the Splenius Capitis?

A

Extension of head and neck

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15
Q

What is the innervation of the Splenius Capitis?

A

Cervical spinal nerves (dorsal rami)

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16
Q

What is the origin of the Splenius Cervicis?

A

SPs of T3-T6

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17
Q

What is the insertion of the Splenius Cervicis?

A

TPs of C1-C3

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18
Q

What is the unilateral action of the Splenius Cervicis?

A

Ipsilateral rotation and lateral flexion of neck

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19
Q

What is the bilateral action of the Splenius Cervicis?

A

Extension of neck

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20
Q

What is the innervation of the Splenius Cervicis?

A

Cervical spinal nerves (dorsal rami)

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21
Q

What is the origin of the sternocleidomastoid (SCM)?

A

Sternal head: manubrium of sternum; Clavicular head: medial portion of clavicle

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22
Q

What is the insertion of the sternocleidomastoid (SCM)?

A

Mastoid process

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23
Q

What are the actions of the sternocleidomastoid (SCM)?

A

Rotation of head to contralateral side; Lateral flexion to ipsilateral side; Bilateral action: neck flexion

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24
Q

What is the motor innervation of the sternocleidomastoid (SCM)?

A

Spinal accessory nerve (CN XI)

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25
Q

What is the sensory innervation of the sternocleidomastoid (SCM)?

A

Cervical spinal nerves (ventral rami)

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26
Q

What is the origin of the Rectus Capitis Posterior Major?

A

SP of C2

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27
Q

What is the insertion of the Rectus Capitis Posterior Major?

A

Lateral portion of inferior nuchal line

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28
Q

What are the actions of the Rectus Capitis Posterior Major?

A

Extension, ipsilateral rotation & lateral flexion of head

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29
Q

What is the nerve supply for the Rectus Capitis Posterior Major?

A

Suboccipital nerve

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30
Q

What is the origin of the Rectus Capitis Posterior Minor?

A

Posterior tubercle of C1

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31
Q

What is the insertion of the Rectus Capitis Posterior Minor?

A

Medial portion of inferior nuchal line

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32
Q

What are the actions of the Rectus Capitis Posterior Minor?

A

Extension & ipsilateral lateral flexion of head

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33
Q

What is the nerve supply for the Rectus Capitis Posterior Minor?

A

Suboccipital nerve

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34
Q

What is the origin of the Obliquus Capitis Superior?

A

TP of C1

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35
Q

What is the insertion of the Obliquus Capitis Superior?

A

Below inferior nuchal line (occipital bone)

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36
Q

What are the actions of the Obliquus Capitis Superior?

A

Extension, ipsilateral rotation & lateral flexion of head

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37
Q

What is the nerve supply of the Obliquus Capitis Superior?

A

Suboccipital nerve

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38
Q

What is the origin of the Obliquus Capitis Inferior?

A

SP of C2

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39
Q

What is the insertion of the Obliquus Capitis Inferior?

A

TP of C1

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40
Q

What are the actions of the Obliquus Capitis Inferior?

A

Extension & ipsilateral rotation of head

41
Q

What is the nerve supply of the Obliquus Capitis Inferior?

A

Suboccipital nerve

42
Q

What is the origin of the posterior belly of the digastric muscle?

A

Mastoid process

43
Q

What is the origin of the anterior belly of the digastric muscle?

A

Digastric fossa of mandible

44
Q

Where does the digastric muscle insert?

A

Hyoid bone (both bellies)

45
Q

What is the action of the digastric muscle?

A

Elevation of hyoid bone and depression of mandible

Stabilizes hyoid bone for infrahyoid action

46
Q

What is the innervation of the posterior belly of the digastric muscle?

A

Facial nerve CN VII

47
Q

What is the innervation of the anterior belly of the digastric muscle?

A

Trigeminal nerve CN V

48
Q

What is the origin of the Stylohyoid muscle?

A

Styloid process

49
Q

What is the insertion point of the Stylohyoid muscle?

A

Hyoid bone

50
Q

What is the action of the Stylohyoid muscle?

A

Elevation of hyoid (during swallowing)

Stabilizes hyoid bone for infrahyoid action.

51
Q

What is the innervation of the Stylohyoid muscle?

A

Facial nerve CN VII

52
Q

What is the origin of the Stylohyoid muscle?

A

Styloid process

53
Q

What is the insertion point of the Stylohyoid muscle?

A

Hyoid bone

54
Q

What is the action of the Stylohyoid muscle?

A

Elevation of hyoid (during swallowing)

Stabilizes hyoid bone for infrahyoid action.

55
Q

What is the innervation of the Stylohyoid muscle?

A

Facial nerve CN VII

56
Q

What is the origin of the geniohyoid muscle?

A

Inner surface of mandible

57
Q

What is the insertion point of the geniohyoid muscle?

A

Hyoid bone

58
Q

What is the action of the geniohyoid muscle?

A

Elevation of hyoid bone (depress mandible)

59
Q

What is the innervation of the geniohyoid muscle?

A

Hypoglossal nerve (CN XII)

60
Q

What is the origin of the Mylohyoid?

A

Inner surface of mandible

61
Q

What is the insertion of the Mylohyoid?

A

Hyoid bone

62
Q

What is the action of the Mylohyoid?

A

Elevation of hyoid bone (depression of mandible when hyoid is fixed)

63
Q

What is the innervation of the Mylohyoid?

A

Trigeminal nerve (CN V)

64
Q

What is the origin of the thyrohyoid muscle?

A

Thyroid cartilage

65
Q

What is the insertion point of the thyrohyoid muscle?

A

Body of hyoid bone

66
Q

What is the action of the thyrohyoid muscle?

A

Depression of hyoid bone (elevation of thyroid cartilage)

67
Q

What is the innervation of the thyrohyoid muscle?

A

C1 via CN XII (hypoglossal nerve)

68
Q

What is the origin of the sternothyroid muscle?

A

Manubrium

69
Q

What is the insertion point of the sternothyroid muscle?

A

Thyroid cartilage

70
Q

What is the action of the sternothyroid muscle?

A

Depression of thyroid cartilage

71
Q

What is the innervation of the sternothyroid muscle?

A

Ansa cervicalis (loop of nerves that are part of the cervical plexus)

72
Q

What is the origin of the sternohyoid?

A

Manubrium and sternoclavicular joint

73
Q

What is the insertion of the sternohyoid?

A

Body of hyoid bone

74
Q

What is the action of the sternohyoid?

A

Depression of hyoid bone and larynx

75
Q

What is the innervation of the sternohyoid?

A

Ansa cervicalis

76
Q

What is the origin of the omohyoid muscle?

A

Superior scapular border (muscle has a superior and inferior belly)

77
Q

What is the insertion point of the omohyoid muscle?

A

Hyoid bone

78
Q

What is the action of the omohyoid muscle?

A

Depression of hyoid bone and larynx

79
Q

What is the innervation of the omohyoid muscle?

A

Ansa cervicalis

80
Q

What is the origin of Longus Capitis?

A

TPs of C3-C5

81
Q

Where does Longus Capitis insert?

A

Occipital bone (anterior foramen magnum)

82
Q

What is the action of Longus Capitis?

A

Flexion of head and neck

83
Q

What is the innervation of Longus Capitis?

A

Cervical spinal nerves (ventral rami)

84
Q

What is the origin of Longus Cervicis (colli)?

A

Lower anterior vertebral bodies and TPs of C3-T3

85
Q

What is the insertion of Longus Cervicis (colli)?

A

Anterior vertebral bodies and TPs of C1-C6

86
Q

What is the action of Longus Cervicis (colli)?

A

Flexion and lateral flexion of neck

87
Q

What is the innervation of Longus Cervicis (colli)?

A

Cervical spinal nerves ventral rami

88
Q

What is the origin of the Anterior Scalene?

A

TPs of C3-C6

89
Q

What is the insertion of the Anterior Scalene?

A

1st rib

90
Q

What actions does the Anterior Scalene perform?

A

Flexion and ipsilateral lateral flexion of neck, elevation of 1st rib

91
Q

What is the innervation of the Anterior Scalene?

A

Cervical spinal nerves, ventral rami

92
Q

What is the origin of the Middle Scalene?

A

TPs of C2-C7

93
Q

What is the insertion of the Middle Scalene?

A

1st rib

94
Q

What is the action of the Middle Scalene?

A

Flexion and ipsilateral lateral flexion of neck; elevation of 1st rib

95
Q

What is the innervation of the Middle Scalene?

A

Cervical spinal nerves (ventral rami)

96
Q

What is the origin of the Posterior Scalene?

A

TPs of C5-C7

97
Q

What is the insertion of the Posterior Scalene?

A

2nd rib

98
Q

What is the action of the Posterior Scalene?

A

Ipsilateral lateral flexion of neck and elevation of 2nd rib

99
Q

What is the innervation of the Posterior Scalene?

A

Cervical spinal nerves (ventral rami)

Anatomy Lab (12 decks)

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