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Anatomy > Muscles of Back Region > Flashcards

Muscles of Back Region Flashcards

1
Q

erector spinae origin

A

iliac crest, sacrum, transverse and spinous processes of vertebrae and supraspinal ligament

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2
Q

erector spinae insertion

A

angles of the ribs (illiocostalis), transverse and spinous processes of vertebrae (longissiums), posterior aspect of the skull (spinalis)

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3
Q

erector spinae action

A

extends and laterally bends the trunk, neck and head

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4
Q

erector spinae innervention

A

segmentally innervated by dorsal primary rami of spinal nerves C1-S5

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5
Q

erector spinae artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

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6
Q

erector spinae notes

A

the erector spinae m. is separated into 3 columns of muscle: iliocostalis laterally, longissimus in an intermediate position and spinalis medially; each of these columns has multiple named parts

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7
Q

iliocostalis origin

A

iliac crest and sacrum

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8
Q

iliocostalis insertion

A

angles of the ribs

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9
Q

iliocostalis action

A

extends and laterally bends the trunk and neck

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10
Q

iliocostalis innervation

A

dorsal primary rami of spinal nerves C4-S5

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11
Q

iliocostalis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

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12
Q

iliocostalis notes

A

the most lateral part of the erector spinae; it may be subdivided into lumborum, thoracis and cervicis portions

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13
Q

interspinales origin

A

upper border of spinous process

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14
Q

interspinales insertion

A

lower border of spinous process above

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15
Q

interspinales action

A

extend trunk and neck

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16
Q

interspinales innervation

A

dorsal primary rami of spinal nerves C1-L5

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17
Q

interspinales artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

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18
Q

interspinales notes

A

these are small and fairly insignificant muscles

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19
Q

intertransversarii origin

A

upper border of transverse process

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20
Q

intertransversarii insertion

A

lower border of transverse process above

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21
Q

intertransversarii action

A

laterally bend trunk and neck

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22
Q

intertransversarii innervation

A

dorsal primary rami of spinal nerves C1-L5

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23
Q

intertransversarii artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

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24
Q

intertransversarii notes

A

these are small and fairly insignificant muscles

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25
Q

longissimus origin

A

transverse process at inferior vertebral levels

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26
Q

longissimus insertion

A

transverse process at superior vertebral levels and mastoid process

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27
Q

longissimus action

A

extends and laterally bends the trunk, neck and head

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28
Q

longissimus innervation

A

dorsal primary rami of spinal nerves C1-S1

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29
Q

longissimus artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

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30
Q

longissimus notes

A

the intermediate part of the erector spinae;it may be subdivided into thoracis, cervicis and capitis portions

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31
Q

multifidus origin

A

sacrum, transverse processes of C3-L5

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32
Q

multifidus insertion

A

spinous processes 2-4 vertebral levels superior to their origin

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33
Q

multifidus action

A

extend and laterally bend trunk and neck, rotate to opposite side

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34
Q

multifidus innervation

A

dorsal primary rami of spinal nerves C1-L5

35
Q

multifidus artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

36
Q

multifidus notes

A

semispinalis, multifidus and rotatores make up the transversospinal muscle group

37
Q

rotatores origin

A

transverse processes

38
Q

rotatores insertion

A

long rotatores: spines 2 vertebrae above origin; short rotatores: spines 1 vertebrae above origin

39
Q

rotatores action

A

rotates the vertebral column to the opposite side

40
Q

rotatores innervation

A

dorsal primary rami of spinal nerves C1-L5

41
Q

rotatores artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

42
Q

rotatores notes

A

semispinalis, multifidus and rotatores make up the transversospinal muscle group

43
Q

semispinalis origin

A

transverse processes of C7-T12

44
Q

semispinalis insertion

A

capitis: back of skull between nuchal lines; cervicis & thoracis: spines 4-6 vertebrae above origin

45
Q

semispinalis action

A

extends the trunk and laterally bends the trunk, rotates the trunk to the opposite side

46
Q

semispinalis innervation

A

dorsal primary rami of spinal nerves C1-T12

47
Q

semispinalis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

48
Q

semispinalis notes

A

three parts are named based on their insertions: capitis, cervicis and thoracis; semispinalis, multifidus and rotatores make up the transversospinal muscle group

49
Q

serratus posterior inferior origin

A

thoracolumbar fascia, spines of vertebrae T11-T12 and L1-L2

50
Q

serratus posterior inferior innervation

A

ribs 9-12, lateral to the angles

51
Q

serratus posterior inferior action

A

pulls down lower ribs

52
Q

serratus posterior inferior innervation

A

branches of the ventral primary rami of spinal nerves T9-T12

53
Q

serratus posterior inferior artery

A

lowest posterior intercostal a., subcostal a., first two lumbar aa.

54
Q

serratus posterior inferior notes

A

a respiratory muscle, it receives ventral ramus innervation; embryonically related to the intercostal muscles, not the deep back mm.

55
Q

serratus posterior superior origin

A

ligamentum nuchae, spines of vertebrae C7 and T1-T3

56
Q

serratus posterior superior insertion

A

ribs 1-4, lateral to the angles

57
Q

serratus posterior superior action

A

elevates the upper ribs

58
Q

serratus posterior superior innervation

A

branches of the ventral primary rami of spinal nerves T1-T4

59
Q

serratus posterior superior artery

A

posterior intercostal aa. 1-4

60
Q

serratus posterior superior notes

A

a respiratory muscle, it receives ventral ramus innervation; embryonically related to the intercostal muscles, not the deep back mm.

61
Q

spinalis origin

A

spinous processes at inferior vertebral levels

62
Q

spinalis insertion

A

spinous processes at superior vertebral levels and base of the skull

63
Q

spinalis action

A

extends and laterally bends trunk and neck

64
Q

spinalis innervation

A

dorsal primary rami of spinal nerves C2-L3

65
Q

spinalis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

66
Q

spinalis notes

A

most medial part of the erector spinae; may be subdivided into thoracis, cervicis and capitis portions

67
Q

splenius capitis origin

A

ligamentum nuchae and spines of C7-T6 vertebrae

68
Q

splenius capitis insertion

A

mastoid process and lateral end of the superior nuchal line

69
Q

splenius capitis action

A

extends and laterally bends the neck and head, rotates head to the same side

70
Q

splenius capitis innervation

A

dorsal primary rami of spinal nerves C2-C6

71
Q

splenius capitis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa.

72
Q

splenius capitis notes

A

named for its shape: splenius means bandage and capitis refers to the insertion of this portion of the muscle

73
Q

splenius capitis origin

A

ligamentum nuchae and spines of C7-T6 vertebrae

74
Q

splenius capitis insertion

A

mastoid process and lateral end of the superior nuchal line

75
Q

splenius capitis action

A

extends and laterally bends the neck and head, rotates head to the same side

76
Q

splenius capitis innervation

A

dorsal primary rami of spinal nerves C2-C6

77
Q

splenius capitis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa.

78
Q

splenius capitis notes

A

named for its shape: splenius means bandage and capitis refers to the insertion of this portion of the muscle

79
Q

splenius cervicis origin

A

ligamentum nuchae and spines of C7-T6 vertebrae

80
Q

splenius cervicis insertion

A

posterior tubercles of the transverse processes of C1-C3 vertebrae

81
Q

splenius cervicis action

A

extends and laterally bends neck and head, rotates head to the same side

82
Q

splenius cervicis innervation

A

dorsal primary rami of spinal nerves C2-C6

83
Q

splenius cervicis artery

A

supplied segmentally by: deep cervical a., posterior intercostal aa.

84
Q

splenius cervicis notes

A

named for its shape: splenius means bandage and cervicis refers to the insertion of this portion of the muscle

Anatomy (13 decks)

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