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MSK > Back Muscles > Flashcards

Back Muscles Flashcards

1
Q

What are the 4 origins of the trapezius muscle?

A

Medial 1/3 of superior nuchal line
External occipital protuberance
Nuchal line
Spinous processes of C7-T12

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2
Q

What are the 3 insertions of the trapezius muscle?

A

Lateral 1/ of the clavicle
Acromion
Scapular spine

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3
Q

What are the actions of the trapezius muscle?

A

Whole muscle - retracts scapula and rotates glenoid cavity superiorly

Superior part - elevate scapula

Inferior part - depress scapula

With fixed scapula - extend neck bilaterally, laterally flex neck and rotate face away bilaterally

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4
Q

What is the innervation of the trapezius muscle?

A

Spinal Accessary nerve (Cranial Nerve XI)

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5
Q

What are the 4 origins of the latissimus dorsi muscle?

A

Spinous processes of T6-L5
Ribs 9-12
Iliac crest
median sacral crest via thoracolumbar fascia

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6
Q

What is the insertion of the latissimus dorsi muscle?

A

Floor of humeral intertubercular groove

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7
Q

What are the actions of the latissimus dorsi muscle?

A

Extend humerus
Adduct humerus
Medially rotate humerus
Rotate glenoid cavity inferiorly

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8
Q

What is the innervation of the latissimus dorsi muscle?

A

Thoracodorsal nerve

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9
Q

RHOMBOID MAJOR

Origin

A

Spinous processes T2-T5

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10
Q

RHOMBOID MAJOR

Insertion

A

Medial border of scapula inferior to scapular spine

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11
Q

RHOMBOID MAJOR

Action

A

Retract scapula
Elevate scapula
Rotate glenoid cavity inferior

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12
Q

RHOMBOID MAJOR

Innervation

A

Dorsal scapular nerve

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13
Q

RHOMBOID MINOR

Origin

A

Spinous processes of C7 and T1

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14
Q

RHOMBOID MINOR

Insertion

A

Medial border of scapula at the scapular spine

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15
Q

RHOMBOID MINOR

Action

A

Retract scapula
Elevate scapula
Rotate glenoid cavity inferiorly

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16
Q

RHOMBOID MINOR

Innervation

A

Dorsal scapular nerve

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17
Q

LEVATOR SCAPULAE

Origin

A

Posterior tubercles of transverse processes on C1-C4

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18
Q

LEVATOR SCAPULAE

Insertion

A

Medial border of scapula superior to scapular spine

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19
Q

LEVATOR SCAPULAE

Action

A

Retract scapula
Elevate scapula
Rotate glenoid cavity inferiorly

With scapula fixed:

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

LEVATOR SCAPULAE

Innervation

A

Dorsal scapular nerve

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21
Q

SERRATUS POSTERIOR SUPERIOR

Origin

A

Inferiormost nuchal ligament

Spinous processes of C7-T3

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22
Q

SERRATUS POSTERIOR SUPERIOR

Insertion

A

Superior surfaces of ribs 2-5

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23
Q

SERRATUS POSTERIOR SUPERIOR

Action

A

Elevate the ribs during forced inspiration

Proprioception

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24
Q

SERRATUS POSTERIOR SUPERIOR

Innervation

A

Intercostal nerves 2-5

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25
Q

SERRATUS POSTERIOR INFERIOR

Origin

A

Spinous processes T11-L2

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26
Q

SERRATUS POSTERIOR INFERIOR

Insertion

A

Inferior surfaces of ribs 8-12

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27
Q

SERRATUS POSTERIOR INFERIOR

Action

A

Depress the ribs during forced expiration

Proprioception

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28
Q

SERRATUS POSTERIOR INFERIOR

Innervation

A

Anterior rami of T9-T12

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29
Q

SPLENIUS CAPITIS

Origin

A

Lower half of nuchal ligament

Spinous processes of C7-T3/T4

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30
Q

SPLENIUS CAPITIS

Insertion

A

Mastoid process of temporal bone
Lateral 1/3 of superior nuchal line
Occipital bone

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31
Q

SPLENIUS CAPITIS

Action

A

Extend the neck bilaterally
Laterally flex the neck unilaterally
Rotate the face toward unilaterally

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32
Q

SPLENIUS CAPITIS

Innervation

A

Posterior rami of C3-C5

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33
Q

SPLENIUS CERVICIS

Origin

A

Spinous processes of T3-T6

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34
Q

SPLENIUS CERVICIS

Insertion

A

Transverse processes of C1-C3/C4

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35
Q

SPLENIUS CERVICIS

Action

A

Extend the neck bilaterally
Laterally flex the neck unilaterally
Rotate the face toward unilaterally

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36
Q

SPLENIUS CERVICIS

Innervation

A

Posterior rami of C5-C7

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37
Q

ILIOCOSTALIS LUMBORUM

Origin

A

Posteriomedial iliac crest
Intermediate sacral crest
lateral sacral crest

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38
Q

ILIOCOSTALIS LUMBORUM

Insertion

A

Costal angles of ribs 7-12

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39
Q

ILIOCOSTALIS LUMBORUM

Action

A

Maintain erect posture bilaterally
Extend vertebral column bilaterally
Laterally flex vertebral column unilaterally

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40
Q

ILIOCOSTALIS LUMBORUM

Innervation

A

Posterior rami of lumbar spinal nerves

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41
Q

ILIOCOSTALIS THORACIS

Origin

A

Costal angles of ribs 7-12

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42
Q

ILIOCOSTALIS THORACIS

Insertion

A

Costal angles of ribs 1-6

Transverse process of C7

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43
Q

ILIOCOSTALIS THORACIS

Action

A

Maintain erect posture bilaterally
Extend vertebral column bilaterally
Laterally flex vertebral column unilaterally

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43
Q

ILIOCOSTALIS THORACIS

Action

A

Maintain erect posture bilaterally
Extend vertebral column bilaterally
Laterally flex vertebral column unilaterally

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44
Q

ILIOCOSTALIS THORACIS

Innervation

A

Posterior rami of thoracic spinal nerves

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45
Q

ILIOCOSTALIS CERVICIS

Origin

A

Costal angles of ribs 3-6

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46
Q

ILIOCOSTALIS CERVICIS

Insertion

A

Posterior tubercles of transverse processes of C4-C6

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46
Q

ILIOCOSTALIS CERVICIS

Insertion

A

Posterior tubercles of transverse processes of C4-C6

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47
Q

ILIOCOSTALIS CERVICIS

Action

A

Extend the neck bilaterally

Laterally flex the neck unilaterally

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48
Q

ILIOCOSTALIS CERVICIS

Innervation

A

Posterior rami of cervical spinal nerves

49
Q

LONGISSIMUS THORACIS

Origin

A

Transverse processes L1-L5
Accessory processes L1-L5
Posteriomedial, lateral, intermediate, and median sacral crests

50
Q

LONGISSIMUS THORACIS

Insertion

A

Ribs 3-12 between costal tubercle and costal angle

51
Q

LONGISSIMUS THORACIS

Action

A

Maintain erect posture bilaterally
Extend vertebral column bilaterally
Laterally flex vertebral column unilaterally

52
Q

LONGISSIMUS THORACIS

Innervation

A

Posterior rami of thoracic spinal nerves

53
Q

LONGISSIMUS CERVICIS

Origin

A

Transverse processes T1-T5

54
Q

LONGISSIMUS CERVICIS

Insertion

A

Posterior tubercles of transverse processes C2-C6

55
Q

LONGISSIMUS CERVICIS

Action

A

Extend neck bilaterally

Laterally flex neck unilaterally

56
Q

LONGISSIIMUS CERVICIS

Innervation

A

Posterior rami of cervical spinal nerves

57
Q

LONGISSIMUS CAPITIS

Origin

A

Transverse processes T1-T5

58
Q

LONGISSIMUS CAPITIS

Insertion

A

Mastoid process of temporal bone

59
Q

LONGISSIMUS CAPITIS

Action

A

Extend the neck bilaterally

Laterally flex the neck unilaterally

60
Q

LONGISSIMUS CAPITIS

Innervation

A

Posterior rami of cervical spinal nerves

61
Q

SPINALIS THORACIS

Origin

A

Spinous processes T11-L2

62
Q

SPINALIS THORACIS

Insertion

A

Spinous processes T1-T8

63
Q

SPINALIS THORACIS

Action

A

Maintain erect posture bilaterally
Extend vertebral column bilaterally
Laterally flex vertebral column unilaterally

64
Q

SPINALIS THORACIS

Innervation

A

Posterior rami of thoracic spinal nerves

65
Q

SPINALIS CERVICIS

Origin

A

Spinous process of C7

Inferiormost nuchal ligament

66
Q

SPINALIS CERVICIS

Insertion

A

Spinous process T2

67
Q

SPINALIS CERVICIS

Action

A

Extend the neck bilaterally

Laterally flex the neck unilaterally

68
Q

SPINALIS CERVICIS

Innervation

A

Posterior rami of cervical spinal nerves

69
Q

SPINALIS CAPITIS

Origin

A

Spinous process of C7

70
Q

SPINALIS CAPITIS

Insertion

A

Usually blends with semispinalis capitis muscle

71
Q

SPINALIS CAPITIS

Action

A

Extend the neck bilaterally

Laterally flex the neck unilaterally

72
Q

SPINALIS CAPITIS

Innervation

A

Posterior rami of cervical spinal nerves

73
Q

SEMISPINALIS CAPITIS

ORIGIN

A

Transverse processes C7-T6

74
Q

SEMISPINALIS CAPITIS

INSERTION

A

Between superior and inferior nuchal lines on occipital bone

75
Q

SEMISPINALIS CAPITIS

ACTION

A

Extend head

Rotate face away

76
Q

SEMISPINALIS CAPITIS

INNERVATION

A

Posterior rami of cervical spinal nerves

77
Q

SEMISPINALIS CERVICIS

ORIGIN

A

Transverse processes T1-T6

78
Q

SEMISPINALIS CERVICIS

INSERTION

A

Spinous processes of C2-C5

79
Q

SEMISPINALIS CERVICIS

ACTION

A

Extend spine

Rotate spine away

80
Q

SEMISPINALIS CERVICIS

INNERVATION

A

Posterior rami of cervical spinal nerves

81
Q

SEMISPINALIS THORACIS

ORIGIN

A

Transverse processes of T6-T12

82
Q

SEMISPINALIS THORACIS

INSERTION

A

Spinous processes C6-T4

83
Q

SEMISPINALIS THORACIS

ACTION

A

Extend spine

Rotate spine away

84
Q

SEMISPINALIS THORACIS

INNERVATION

A

Posterior rami of thoracic spinal nerves

85
Q

MULTIFIDUS (LUMBORUM, THORACIS, AND CERVICIS)

ORIGIN

A

Lumbar - mamillary process of vertebrae
Thoracic - transverse process of vertebrae
Cervical - articular processes of C4-C7

86
Q

MULTIFIDUS (LUMBORUM, THORACIS, AND CERVICIS)

INSERTION

A

Spinous processes 3-4 segments superior

Does not insert on atlas

87
Q

MULTIFIDUS (LUMBORUM, THORACIS, AND CERVICIS)

ACTION

A

Extend spine

Rotate spine away

88
Q

MULTIFIDUS (LUMBORUM, THORACIS, AND CERVICIS)

INNERVATION

A

Posterior rami of cervical, thoracic, and lumbar spinal nerves

89
Q 
ROTOTARES LONGUS (LUMBORUM, THORACIS, AND CERVICIS)
ORIGIN
A

Transverse processes

90
Q 
ROTOTARES LONGUS (LUMBORUM, THORACIS, AND CERVICIS)
INSERTION
A

Roots of spinous processes 2 segments superiorly

91
Q 
ROTOTARES LONGUS (LUMBORUM, THORACIS, AND CERVICIS)
ACTION
A

Extend spine
Rotate spine away
Proprioception

92
Q 
ROTOTARES LONGUS (LUMBORUM, THORACIS, AND CERVICIS)
INNERVATION
A

Posterior rami of cervical, thoracic, and lumbar spinal nerves

93
Q 
ROTOTARES BREVIS (LUMBORUM, THORACIS, AND CERVICIS)
ORIGIN
A

Transverse processes

94
Q 
ROTOTARES BREVIS (LUMBORUM, THORACIS, AND CERVICIS)
INSERTION
A

Roots of adjacent spinous processes

95
Q 
ROTOTARES BREVIS (LUMBORUM, THORACIS, AND CERVICIS)
ACTION
A

Extend spine
Rotate spine away
Proprioception

96
Q 
ROTOTARES BREVIS (LUMBORUM, THORACIS, AND CERVICIS)
INNERVATION
A

Posterior rami of cervical, thoracic, and lumbar nerves

97
Q

INTERSPINALIS

ORIGIN

A

Spinous process

98
Q

INTERSPINALIS

INSERTION

A

Adjacent spinous process

99
Q

INTERSPINALIS

ACTION

A

Extend spine

100
Q

INTERSPINALIS

INNERVATION

A

Suboccipital nerve (posterior ramus of 1st cervical spinal nerve)

101
Q

INTERTRANSVERSARII

ORIGIN

A

Transverse processes

102
Q

INTERTRANSVERSARII

INSERTION

A

Adjacent transverse processes

103
Q

INTERTRANSVERSARII

ACTION

A

Laterally flex spine

104
Q

INTERTRANSVERSARII

INNERVATION

A

Suboccipital nerve (posterior ramus of 1st cervical spinal nerve)

105
Q

RECTUS CAPITIS POSTERIOR MAJOR

ORIGIN

A

Spinous process of axis (C2)

106
Q

RECTUS CAPITIS POSTERIOR MAJOR

INSERTION

A

Lateral aspect inferior nuchal line

107
Q

RECTUS CAPITIS POSTERIOR MAJOR

ACTION

A

Extend head

Rotate face torward

108
Q

RECTUS CAPITIS POSTERIOR MAJOR

INNERVATION

A

Suboccipital nerve

109
Q

RECTUS CAPITIS POSTERIOR MINOR

ORIGIN

A

Posterior tubercle of the atlas (C1)

110
Q

RECTUS CAPITIS POSTERIOR MINOR

INSERTION

A

Inferior to inferior nuchal line

111
Q

RECTUS CAPITIS POSTERIOR MINOR

ACTION

A

Extend head

112
Q

RECTUS CAPITIS POSTERIOR MINOR

ACTION

A

Extend head

113
Q

RECTUS CAPITIS POSTERIOR MINOR

INNERVATION

A

Suboccipital nerve

114
Q

OBLIQUUS CAPITIS SUPERIOR

ORIGIN

A

Transverse process of atlas (C1)

115
Q

OBLIQUUS CAPITIS SUPERIOR

INSERTION

A

Between superior and inferior nuchal lines

116
Q

OBLIQUUS CAPITIS SUPERIOR

ACTION

A

Extend head

Laterally flex head

117
Q

OBLIQUUS CAPITIS SUPERIOR

INNERVATION

A

Suboccipital nerve

118
Q

OBLIQUUS CAPITIS INFERIOR

ORIGIN

A

Spinous process of the axis (C2)

119
Q

OBLIQUUS CAPITIS INFERIOR

INSERTION

A

Transverse process of atlas (C1)

120
Q

OBLIQUUS CAPITIS INFERIOR

ACTION

A

Rotate face toward

121
Q

OBLIQUUS CAPITIS INFERIOR

INNERVATION

A

Suboccipital nerve

MSK (2 decks)

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