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MSK 1 > Back Muscles > Flashcards

Back Muscles Flashcards

1
Q

Trapezius M. : Origin

A
  • Medial 1/3 of the superior nuchal line
  • External occipital protuberance
  • Nuchal L.
  • Spinous processes C7-T12
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2
Q

Trapezius M. : Insertion

A
  • Lateral 1/3 of clavicle
  • Acromion
  • Scapular spine
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3
Q

Trapezius M. : Action

A

Whole Muscle:

  • Retract the scapula
  • Rotate the glenoid cavity superiorly

Superior Part:
- Elevate scapula

Inferior Part:
- Depress scapula

With scapula fixed:

  • Extend neck (bilaterally)
  • Laterally flex neck (unilaterally)
  • Rotate face away (unilaterally)
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4
Q

Trapezius M. : Innervation

A

Spinal Accessory N.

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5
Q

Latissimus Dorsi M. : Origin

A
  • Spinous processes T6-L5
  • Ribs 9-12
  • Iliac crest
  • Median sacral crest via thoracolumbar fascia
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6
Q

Latissimus Dorsi M. : Insertion

A

Floor of humeral intertubercular groove

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7
Q

Latissimus Dorsi M. : Action

A
  • Extend humerus
  • Adduct humerus
  • Medially rotate humerus
  • Rotate glenoid cavity inferiorly
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8
Q

Latissimus Dorsi M. : Innervation

A

Thoracodorsal N.

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9
Q

Rhomboid Major M. : Origin

A

Spinous processes T2-T5

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10
Q

Rhomboid Major M. : Insertion

A

Medial border of scapula (inferior to scapular spine)

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11
Q

Rhomboid Major M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly
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12
Q

Rhomboid Major M. : Innervation

A

Dorsal Scapular N.

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13
Q

Rhomboid Minor M. : Origin

A

Spinous processes C7, T1

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14
Q

Rhomboid Minor M. : Insertion

A

Medial border of scapula (at the scapular spine)

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15
Q

Rhomboid Minor M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly
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16
Q

Rhomboid Minor M. : Innervation

A

Dorsal Scapular N.

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17
Q

Levator Scapulae M. : Origin

A

Posterior tubercles of transverse processes C1-C4

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18
Q

Levator Scapulae M. : Insertion

A

Medial border of scapula (superior to scapular spine)

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19
Q

Levator Scapulae M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly

With scapula fixed:

  • Extend the neck (bilaterally)
  • Laterally flex the neck (unilaterally)
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20
Q

Levator Scapulae M. : Innervation

A

Dorsal Scapular N.

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21
Q

Serratus Posterior Superior M. : Insertion

A

Superior surfaces of ribs 2-5

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22
Q

Serratus Posterior Superior M. : Action

A
  • Elevate the ribs during forced inspiration

- Proprioception

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23
Q

Serratus Posterior Superior M. : Innervation

A

Intercostal NN. (2-5)

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24
Q

Serratus Posterior Inferior M. : Insertion

A

Inferior surfaces of ribs 8-12

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25
Q

Serratus Posterior Inferior M. : Action

A
  • Depress the ribs during forced expiration

- Proprioception

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26
Q

Serratus Posterior Inferior M. : Innervation

A

Anterior rami of T9-12

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27
Q

Splenius Capitis M. : Insertion

A
  • Mastoid process temporal b.
  • Lateral 1/3 of superior nuchal line
  • Occipital b.
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28
Q

Splenius Capitis M. : Action

A
  • Extend the neck (bilaterally)
  • Laterally flex the neck (unilaterally)
  • Rotate the face toward (unilaterally)
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29
Q

Splenius Capitis M. : Innervation

A

Posterior rami C3-C5

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30
Q

Splenius Cervicis M. : Insertion

A

Transverse processes C1-C3/C4

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31
Q

Splenius Cervicis M. : Action

A
  • Extend the neck (bilaterally)
  • Laterally flex the neck (unilaterally)
  • Rotate the face toward (unilaterally)
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32
Q

Splenius Cervicis M. : Innervation

A

Posterior rami C5-C7

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33
Q

Illiocostalis Lumborum M. : Insertion

A

Costal angles ribs 7-12

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34
Q

Illiocostalis Lumborum M. : Action

A
  • Maintain erect posture (bilaterally)
  • Extend the vertebral column (bilaterally)
  • Laterally flex the vertebral column (unilaterally)
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35
Q

Illiocostalis Lumborum M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal N.

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36
Q

Illiocostalis Thoracis M. : Insertion

A
  • Costal angles ribs 1-6

- Transverse process C7

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37
Q

Illiocostalis Thoracis M. : Action

A
  • Maintain erect posture (bilaterally)
  • Extend the vertebral column (bilaterally)
  • Laterally flex the vertebral column (unilaterally)
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38
Q

Illiocostalis Thoracis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal N.

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39
Q

Illiocostalis Cervicis M. : Insertion

A
  • Posterior tubercles of transverse processes C4-C6
40
Q

Illiocostalis Cervicis M. : Action

A
  • Extend the neck (bilaterally)

- Laterally flex the neck (unilaterally)

41
Q

Illiocostalis Cervicis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal N.

42
Q

Longissimus Thoracis M. : Insertion

A

Ribs 3-12 between costal tubercle and costal angle

43
Q

Longissimus Thoracis M. : Action

A
  • Maintain erect posture (bilaterally)
  • Extend the vertebral column (bilaterally)
  • Laterally flex the vertebral column (unilaterally)
44
Q

Longissimus Thoracis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

45
Q

Longissimus Cervicis M. : Insertion

A
  • Posterior tubercles of transverse processes C2-C6

- Articular processes C2-C6

46
Q

Longissimus Cervicis M. : Action

A
  • Extend the neck (bilaterally)

- Laterally flex the neck (unilaterally)

47
Q

Longissimus Cervicis M.: Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

48
Q

Longissimus Capitis M.: Insertion

A

Mastoid process of temporal b.

49
Q

Longissimus Capitis M. : Action

A
  • Extend the neck (bilaterally)

- Laterally flex the neck (unilaterally)

50
Q

Longissimus Capitis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

51
Q

Spinalis Thoracis M. : Insertion

A

Spinous processes T1-T8

52
Q

Spinalis Thoracis M. : Action

A
  • Maintain erect posture (bilaterally)
  • Extend the vertebral column (bilaterally)
  • Laterally flex the vertebral column (unilaterally)
53
Q

Spinalis Thoracis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

54
Q

Spinalis Cervicis M. : Insertion

A

Spinous process T2

55
Q

Spinalis Cervicis M. : Action

A
  • Extend the neck (bilaterally)

- Laterally flex the neck (unilaterally)

56
Q

Spinalis Cervicis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

57
Q

Spinalis Capitis M. : Insertion

A

Usually blends in with semispinalis capitis m.

58
Q

Spinalis Capitis M. : Action

A
  • Extend the neck (bilaterally)

- Laterally flex the neck (unilaterally)

59
Q

Spinalis Capitis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

60
Q

Semispinalis Capitis M. : Insertion

A

Between superior and inferior nuchal lines on occipital b.

61
Q

Semispinalis Capitis M. : Action

A
  • Extend head

- Rotate face away

62
Q

Semispinalis Capitis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

63
Q

Semispinalis Cervicis M. : Insertion

A

Spinous processes C2-C5

64
Q

Semispinalis Cervicis M. : Action

A
  • Extend spine

- Rotate spine away

65
Q

Semispinalis Cervicis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

66
Q

Semispinalis Thoracis M. : Insertion

A

Spinous processes C6-T4

67
Q

Semispinalis Thoracis M. : Action

A
  • Extend spine

- Rotate spine away

68
Q

Semispinalis Thoracis M. : Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

69
Q

Multifidus MM. (Lumborum, Thoracis, Cervicis): Insertion

A

Spinous processes 3-4 segments superiorly; does not insert on atlas

70
Q

Multifidus MM. (Lumborum, Thoracis, Cervicis): Action

A
  • Extend spine

- Rotate spine away

71
Q

Multifidus MM. (Lumborum, Thoracis, Cervicis): Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

72
Q

Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Insertion

A

Roots of spinous processes 2 segments superiorly

73
Q

Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Action

A
  • Extend spine away
  • Rotate spine away
  • Proprioception
74
Q

Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

75
Q

Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Insertion

A

Roots of adjacent spinous processes

76
Q

Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Action

A
  • Extend spine away
  • Rotate spine away
  • Proprioception
77
Q

Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Innervation

A

Posterior rami of cervical, thoracic, and lumbar spinal NN.

78
Q

Interspinalis M. : Insertion

A

Adjacent spinous process

79
Q

Interspinalis M. : Action

A

Extend spine

80
Q

Interspinalis M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

81
Q

Intertransversarii M. : Insertion

A

Adjacent transverse processes

82
Q

Intertransversarii M. : Action

A

Laterally flex spine

83
Q

Intertransversarii M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

84
Q

Rectus Capitis Posterior Major M. : Insertion

A

Lateral aspect inferior nuchal line

85
Q

Rectus Capitis Posterior Major M. : Action

A
  • Extend head

- Rotate the face toward

86
Q

Rectus Capitis Posterior Major M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

87
Q

Rectus Capitis Posterior Minor M. : Insertion

A

Inferior to inferior nuchal line

88
Q

Rectus Capitis Posterior Minor M. : Action

A

Extend head

89
Q

Rectus Capitis Posterior Minor M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

90
Q

Obliquus Capitis Superior M. : Insertion

A

Between superior and inferior nuchal lines

91
Q

Obliquus Capitis Superior M. : Action

A
  • Extend head

- Laterally flex head

92
Q

Obliquus Capitis Superior M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

93
Q

Obliquus Capitis Inferior M. : Insertion

A

Transverse process atlas (C1)

94
Q

Obliquus Capitis Inferior M. : Action

A

Rotate the face toward

95
Q

Obliquus Capitis Inferior M. : Innervation

A

Suboccipital N. (posterior ramus 1st cervical spinal N.)

MSK 1 (1 decks)

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