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my Gross Anatomy > Intrinsic Muscles of the back > Flashcards

Intrinsic Muscles of the back Flashcards

1
Q

Posterior serratus superior insertion

A

superior border of 2nd - 4th ribs

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2
Q

Posterior serratus superior innervation

A

2nd - 5th intercostal nerves

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3
Q

Posterior serratus superior action

A

elevates ribs

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4
Q

posterior serratus inferior origin

A

T11-L2 (spinous process)

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5
Q

posterior serratus inferior insertion

A

inferior border near angle 8th - 12th ribs

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6
Q

posterior serratus inferior innervation

A

anterior rami of spinal nn T9-T12

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7
Q

posterior serratus inferior action

A

depresses ribs

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8
Q

Posterior serratus superior origin

A 
ligamentum nuchae (nuchal ligament)
C7-T3 spinous process
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9
Q

iliocostalis cervicis origin

A

3rd - 7th ribs

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10
Q

iliocostalis cervicis insertion

A

transverse processes of C4-C6

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11
Q

iliocostalis cervicis innervation

A

spinal nerves C8-L1

posterior rami, lateral branches

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12
Q

iliocostalis cervicis action

A

Bilaterally: extends spine
Unilaterally: bends spine laterally to the same side

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13
Q

iliocostalis thoracis origin

A

7th - 12th ribs

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14
Q

iliocostalis thoracis insertion

A

1st - 6th ribs

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15
Q

iliocostalis thoraacis innervation

A

spinal nerves C8-L1

posterior rami, lateral branches

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16
Q

iliocostalis lumborum action

A

Bilaterally: extends spine
Unilaterally: ends spine laterally to same side

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17
Q

longissimus capitis origin

A

transverse processes and articular processes of C4-C7

transverse processes of T1-T3

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18
Q

longissimus capitis insertion

A

mastoid process (temporal bone)

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19
Q

longissimus capitis innervation

A

Spinal nerve C1-L5 (posterior rami, lateral branches)

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20
Q

longissimus capitis action

A

Bilaterally: Extends head
Unilaterally: flex and extends head to same side

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21
Q

Longissimus cervicis origin

A

Transverse processes of T1-T6

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22
Q

longissimus cervicis insertation

A

transverse processes of C2-C5

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23
Q

longissimus cervicis innervation

A

spinal nerves C1-L5 (posterior rami, lateral branches)

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24
Q

longissimus thoracis origin

A

sacrum
iliac crest
lumbar vertebrae (spinous processes)
lower thoracic vertebrae (transverse processes

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25
Q

longissimus thoracis insertion

A 
2nd-12th ribs
lumbar vertebrae (costal facets)
thoracic vertebrae (transverse processes)
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26
Q

longissimus thoracis innervation

A

Spinal nerves C1-L5 (posterior rami, lateral branches)

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27
Q

Longissimus thoracis action

A

bilateral: extends the spine
unilateral: bends spine to same side

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28
Q

longissimus cervicis action

A

bilateral: extends the spine
unilateral: bends spine to same side

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29
Q

spinalis cervicis origin

A

C5-T2 (spinous processes)

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30
Q

spinalis cervicis insertion

A

C2-C5 (spinous process)

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31
Q

spinalis cervicis innervation

A

spinal nerves (posterior rami)

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32
Q

spinalis cervicis action

A

bilaterally: extends cervical and thoracic spine

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33
Q

spinalis thoracis origin

A

T10-L3 (spinous process, lateral surface)

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34
Q

spinalis thoracis insertion

A

T2-T8 (spinous process, lateral surface)

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35
Q

spinalis thoracis innervation

A

spinal nerves (posterior rami)

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36
Q

spinalis thoracis action

A

bilateral: extend cervical and thoracic spine
unilateral: bend cervical and thoracic spine to same side

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37
Q

splenius capitis origin

A

nuchal ligament

C3-C7 (spinous process)

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38
Q

splenius capitis insertion

A

Lateral superior nuchal line
mastoid process
(of occipital bone)

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39
Q

splenius capitis innervation

A

spinal nerve C1-C6 (posterior rami, lateral branches)

40
Q

splenius capitis action

A

bilaterally: extends cervical spine and head
unilaterally: flex and rotate head to same side

41
Q

splenius cervicis origin

A

T3-T6 (spinous process)

42
Q

splenius cervicis insertion

A

C1-C2 (transverse processes)

43
Q

splenius cervicis innervation

A

spinal nerve C1-C6 (posterior rami, lateral branches)

44
Q

splenius cervicis action

A

bilaterally: extends cervical spine and head
unilaterally: flex and rotates the head to same side

45
Q

semispinalis capitis origin

A

C4-T7 (transverse processes and articular processes)

46
Q

semispinalis capitis insertion

A

between superior and inferior nuchal lines

47
Q

semispinalis capitis innervation

A

spinal nerve (posterior rami)

48
Q

semispinalis capitis action

A

Bilateral: extends thoracic and cervical spine and head
Unilateral: bends head, cervical, and thoracic spine to one side; rotates to opposite side

49
Q

Semispinalis cervicis origin

A

T1-T6 (transverse processes)

50
Q

Semispinalis cervicis insertion

A

C2-C5 (spinous process)

51
Q

Semispinalis cervicis innervation

A

spinal nerve (posterior rami)

52
Q

Semispinalis cervicis action

A

Bilateral: extension of thoracic and cervical spine and the head
Unilateral: bends head, cervical, and thoracic spine to same side; rotate to opposite side

53
Q

Semispinalis thoracis origin

A

T6-T12 (spinous process)

54
Q

Semispinalis thoracis insertion

A

C6-T4 (spinous process)

55
Q

Semispinalis thoracis innervation

A

spinal nerve (posterior rami)

56
Q

Semispinalis thoracis action

A

bilaterally: extension of cervical, thoracic spine and the head
unilaterally: bends head, cervical, thoracic spine to same side; rotates to opposite side

57
Q

multifidus origin/insertion

A

C2 to sacrum

between transverse processes and spinous processes skipping 2-4 vertebrae

58
Q

multifidus innervation

A

spinal nerves (posterior rami)

59
Q

multifidus action

A

Bilateral: Extends spine
Unilateral: Flexes spine to the same side
rotates to opposite sides

60
Q

rotatores brevis origin/insertion

A

T1-T12 between transverse processes and spinous processes of every adjacent vertebrae

61
Q

rotatores brevis innervation

A

spinal nerves (posterior rami)

62
Q

rotatores brevis action

A

Bilateral: Extends thoracic spine
Unilateral: Rotates spine to opposite side

63
Q

rotatores longi origin/insertion

A

T1-T12

between transverse processes and spinous processes of every other vertebrae

64
Q

rotatores longi innervation

A

spinal nerves (posterior rami)

65
Q

rotatores longi action

A

Bilateral: Extends thoracic spine
Unilateral: Rotates spine to opposite side

66
Q

obliquus capitis inferior origin

A

spinous process of C2

67
Q

obliquus capitis inferior insertion

A

transverse process of C1

68
Q

obliquus capitis inferior innervation

A

C1-suboccipital nerve

posterior rami

69
Q

obliquus capitis inferior action

A

Bilaterally: extends the head
Unilaterally: rotates the head ipsilaterally

70
Q

obliquus capitis superior origin

A

C1 transverse process

71
Q

obliquus capitis superior insertion

A

middle 1/3 of inferior nuchal line above rectus capitis posterior major

72
Q

obliquus capitis superior innervation

A

C1-suboccipital nerve

posterior rami

73
Q

obliquus capitis superior action

A

Bilaterally: extends the head
Unilaterally: ipsilaterally flexes the head
contralaterally rotates the head

74
Q

rectus capitis posterior major origin

A

C2 spinous processes

75
Q

rectus capitis posterior major insertion

A

middle 1/3 of inferior nuchal line

76
Q

rectus capitis posterior major innervation

A

C1-suboccipital nerve

posterior rami

77
Q

rectus capitis posterior major action

A

Bilaterally: extends the head
Unilaterally: rotates head ipsilaterally

78
Q

rectus capitis posterior minor origin

A

C1 posterior tubercle

79
Q

rectus capitis posterior minor insertion

A

medial 1/3 of inferior nuchal line

80
Q

rectus capitis posterior innervation

A

C1-posterior rami

suboccipital nerve

81
Q

rectus capitis posterior minor action

A

bilaterally: extends head
unilaterally: rotate head ipsilaterally

82
Q

sternocleidomastoid origin

A

sternal head: sternum

clavicular head: clavicle

83
Q

sternocleidomastoid insertion

A

mastoid process of temporal bone

superior nuchal line

84
Q

sternocleidomastoid innervation

A

motor accessory nerve CN XI

pain and proprioception C2-C3

85
Q

sternocleidomastoid action

A

Bilaterally: extends head
aids in respiration when head is fixed
Unilaterally: ispilaterally laterally flexes head
contralaterally rotates head

86
Q

scalene anterior origin

A

anterior tubercle of transverse processes of C3-C6

87
Q

scalene anterior insertion

A

1st rib scalene tubercle

88
Q

scalene anterior innervation

A

direct branches from cervical and brachial plexus C3-C8

89
Q

scalene anterior action

A

Mobile ribs: elevates upper ribs during forced inspiration
Fixed ribs: bilaterally: flexes neck
unilaterally: bends cervical spine to same side

90
Q

middle scalene origin

A

C1-C2 transverse processes

C3 to C7 posterior tubercles of transverse processes

91
Q

middle scalene insertion

A

first rib, posterior to the groove for subclavian artery

92
Q

middle scalene innervation

A

direct branches from cervical and brachial plexus C3-C8

93
Q

middle scalene action

A

Mobile ribs: elevates upper ribs (forced inspiration)
Fixed ribs:
bilaterally: flex neck
unilaterally: flex cervical spine to ipsilateraly side

94
Q

posterior scalene origin

A

posterior tubercle of transverse processes of C5-C7

95
Q

posterior scalene insertion

A

2nd rib (outer surface)

96
Q

posterior scalene action

A

Mobile ribs: elevates upper ribs (forced inspiration)
Fixed ribs:
Bilaterally: flex neck
Unilaterally: laterally flexes cervical spine ipsilaterally

my Gross Anatomy (4 decks)

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