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Foundations > Back & Rotator Cuff Muscles > Flashcards

Back & Rotator Cuff Muscles Flashcards

1
Q

Trapezius

Origin

A
  • Superior Nuchal Line
  • External occipital protuberance
  • SP of C7 to T12
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2
Q

Trapezius

Insertion

A
  • Lateral 1/3 of clavicle
  • Acromion
  • Spine of the scapula
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3
Q

Trapezius

Action

A
  • Rotate and elevate scapula (superior part)
  • retract scapula (middle)
  • depress scapula (inferior)
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4
Q

Trapezius

innervation

A

Motor: spinal accessory nerve (CN XI)

Proprioception: Anterior/ventral rami of C3, C4

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5
Q

Trapezius, blood supply

A

Transverse cervical artery

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6
Q

Latissimus Dorsi

Origin

A
  • SP T7-L5
  • Thoracolumbar fascia
  • sacrum
  • iliac crest
  • ribs 10-12
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7
Q

Latissimus dorsi

Insertion

A

Floor of the intertubercular sulcus of the humerus

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8
Q

Latissimus dorsi

Action

A

Extends, adducts, and medially rotates the humerus

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9
Q

Latissimus dorsi

Innervation

A

Thoracodorsal nerve (C6, C7, C8 of brachial plexus)

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10
Q

Latissimus dorsi

Blood supply

A

Thoracodorsal artery

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11
Q

Rhomboid major

Origin

A

SP T2-T5

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12
Q

Rhomboid major

Insertion

A

Medial border of scapula below its spine

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13
Q

Rhomboid major

Action

A

Retract and rotate scapula (to tilt glenoid cavity inferiorly)

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14
Q

Rhomboid major

Innervation

A

Dorsal scapular nerve (C5 of brachial plexus)

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15
Q

Rhomboid major

Blood supply

A

Dorsal scapular artery

deep branch of transverse cervical artery

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16
Q

Rhomboid minor

Origin

A

Ligamentum nuchae and SP C7-T1

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17
Q

Rhomboid minor

Insertion

A

Medial border of the scapula (at its spine)

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18
Q

Rhomboid minor

Action

A

Retract and rotate scapula (to tilt glenoid cavity inferiorly)

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19
Q

Rhomboid minor

Innervation

A

Dorsal scapular nerve (C5 of brachial plexus)

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20
Q

Rhomboid minor

Blood supply

A

Dorsal scapular artery

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21
Q

Levator scapulae

Origin

A

Transverse processes of C1-C4

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22
Q

Levator scapulae

Insertion

A

Superior angle of the scapula

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23
Q

Levator scapulae

Action

A

Elevates and rotates the scapula

to tilt the glenoid cavity inferiorly

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24
Q

Levator scapulae

Innervation

A

Dorsal scapular nerve (C5 of brachial plexus)

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25
Q

Levator scapulae

Blood supply

A

Dorsal scapular artery

deep branch of transverse cervical artery

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26
Q

Deltoid

Origin

A
  • Spine of the scapula
  • Acromion of the scapula
  • Lateral 1/3 of the clavicle
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27
Q

Deltoid

Insertion

A

Deltoid tuberosity of the humerus

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28
Q

Deltoid

Action

A

Abducts, flexes, and extends the humerus

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29
Q

Deltoid

Innervation

A

Axillary nerve

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30
Q

Deltoid

Blood supply

A

Posterior circumflex humeral artery

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31
Q

Supraspinatus

Origin

A

Supraspinous fossa of the scapula

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32
Q

Supraspinatus

Insertion

A

Superior facet of the greater tubercle of the humerus

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33
Q

Supraspinatus

Action

A

Abducts the humerus (mostly first 15 degrees)

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34
Q

Supraspinatus

Innervation

A

Suprascapular nerve (C5, C6 of brachial plexus)

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35
Q

Supraspinatus

Blood supply

A

Suprascapular artery

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36
Q

Infraspinatus

Origin

A

Infraspinous fossa of scapula

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37
Q

Infraspinatus

Insertion

A

Middle facet of the greater tubercle of the humerus

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38
Q

Infraspinatus

Action

A

Laterally rotates humerus

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39
Q

Infraspinatus

Innervation

A

Suprascapular nerve (C5, C6 of brachial plexus)

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40
Q

Infraspinatus

Blood supply

A

Supracapular artery

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41
Q

Subscapularis

Origin

A

Subscapular fossa of scapula

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42
Q

Subscapularis

Insertion

A

Lesser tubercle of the humerus

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43
Q

Subscapularis

Action

A

Medially rotates the humerus

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44
Q

Subscapularis

Innervation

A

Upper subscapular nerve & lower subscapular nerve

C5 and C6 of brachial plexus, respectively

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45
Q

Subscapularis

Blood supply

A

Subscapular artery

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46
Q

Teres major

Origin

A

Inferior angle of the scapula

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47
Q

Teres major

Insertion

A

Medial lip of the intertubercular sulcus of the humerus

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48
Q

Teres major

Action

A

Adducts and medially rotates the humerus

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49
Q

Teres major

Innervation

A

Lower subscapular nerve (C6 of brachial plexus)

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50
Q

Teres major

Blood supply

A

Subscapular and circumflex scapular arteries

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51
Q

Teres minor

Origin

A

Lateral border of the scapula

52
Q

Teres minor

Insertion

A

Inferior facet of the greater tubercle of the humerus

53
Q

Teres minor

Action

A

Laterally rotates the humerus

54
Q

Teres minor

Innervation

A

Axillary nerve

55
Q

Teres minor

Blood supply

A

Subscapular and circumflex scapular arteries

56
Q

Serratus posterior superior

Origin

A

SP C7–T3

This is one of two intermediate muscles of the back

57
Q

Serratus posterior superior

Insertion

A

Superior borders of ribs 2–5, lateral to their angles

58
Q

Serratus posterior superior

Action

A

Elevates ribs 2–5

59
Q

Serratus posterior superior

Innervation

A

Anterior rami of T2–T5

60
Q

Serratus posterior superior

Blood supply

A

Posterior Intercostal arteries

61
Q

Serratus posterior inferior

Origin

A

SP T11–L2

This is one of two intermediate muscles of the back

62
Q

Serratus posterior inferior

Insertion

A

Inferior border of ribs 9–12, lateral to their angles

63
Q

Serratus posterior inferior

Action

A

Depresses ribs 9–12

64
Q

Serratus posterior inferior

Innervation

A

Anterior rami (ventral rami) of T9–T12

65
Q

Serratus posterior inferior

Blood supply

A

Posterior Intercostal arteries

66
Q

Splenius capitis

Origin

A

Ligamentum nuchae

SP C7-T4

67
Q

Splenius capitis

Insertion

A
  • Mastoid process

- Lateral one-third of superior nuchal line

68
Q

Splenius capitis

Action

A

Unilateral—laterally flexes and rotates head or neck to same side

Bilateral—extends head and neck

69
Q

Splenius capitis

Innervation

A

Posterior (dorsal) rami of middle cervical nerves

70
Q

Splenius capitis

Blood supply

A

Deep cervical artery & Descending branch of occipital artery

71
Q

Splenius cervicis

Origin

A

SP T3–T6

72
Q

Splenius cervicis

Insertion

A

TP C1–C3

73
Q

Splenius cervicis

Action

A

Unilateral—laterally flexes and rotates head or neck to same side

Bilateral—extends head and neck

74
Q

Splenius cervicis

Innervation

A

Posterior (dorsal) rami of middle cervical nerves

75
Q

Splenius cervicis

Blood supply

A

Deep cervical artery & Descending branch of occipital artery

76
Q 
Erector spinae (Spinalis)
Origin
A
  • Median sacral crest
  • Posterior surface sacrum
  • SP L and lower T
  • Medial part iliac crest
77
Q 
Erector spinae (Spinalis)
Insertion
A

SP of T and C

78
Q 
Erector spinae (Spinalis)
Action
A

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

79
Q 
Erector spinae (Spinalis)
Innervation
A

Posterior rami of lower cervical nerves

80
Q 
Erector spinae (Spinalis)
Blood supply
A

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal, subcostal, and lumbar arteries

Sacral part: Dorsal branches of lateral sacral arteries

81
Q 
Erector spinae (Longissimus)
Origin
A
  • Median sacral crest
  • Posterior surface sacrum
  • SP L and lower T
  • Medial part iliac crest
82
Q 
Erector spinae (Longissimus)
Insertion
A
  • Between tubercles and angles of ribs

- TP of T and C

83
Q 
Erector spinae (Longissimus)
Action
A

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

84
Q 
Erector spinae (Longissimus)
Innervation
A

Posterior rami of lower cervical nerves

85
Q 
Erector spinae (Longissimus)
Blood supply
A

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal, subcostal, and lumbar arteries

Sacral part: Dorsal branches of lateral sacral arteries

86
Q 
Erector spinae (Iliocostalis)
Origin
A
  • Median sacral crest
  • Posterior surface sacrum
  • SP L and lower T
  • Medial part iliac crest
87
Q 
Erector spinae (Iliocostalis)
Insertion
A

Angles of lower ribs and TP of C

88
Q 
Erector spinae (Iliocostalis)
Action
A

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

89
Q 
Erector spinae (Iliocostalis)
Innervation
A

Posterior rami of lower cervical nerves

90
Q 
Erector spinae (Iliocostalis)
Blood supply
A

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal, subcostal, and lumbar arteries

Sacral part: Dorsal branches of lateral sacral arteries

91
Q

Semispinalis capitis

Origin

A
  • TP C7–T6/T7

- AP C4–C6

92
Q

Semispinalis capitis

Insertion

A

Between superior and inferior nuchal lines of occipital bone medially

93
Q

Semispinalis capitis

Action

A

Unilateral—extends and laterally rotates head to opposite side

Bilateral—extends head

94
Q

Semispinalis capitis

Innervation

A

Posterior rami of spinal nerves

95
Q

Semispinalis capitis

Blood supply

A

Occipital, deep cervical, & vertebral arteries

96
Q

Semispinalis cervicis

Origin

A

TP T1–T5/T6

97
Q

Semispinalis cervicis

Insertion

A

SP C2–C5

98
Q

Semispinalis cervicis

Action

A

Unilateral—extends and laterally rotates neck to opposite side

Bilateral—extends neck

99
Q

Semispinalis cervicis

Innervation

A

Posterior rami of spinal nerves

100
Q

Semispinalis cervicis

Blood supply

A

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal arteries

101
Q

Multifidus

Origin

A
  • Sacrum
  • Ilium
  • TP T1–L5
  • AP C4–C7
102
Q

Multifidus

Insertion

A

SP L5–C2

103
Q

Multifidus

Action

A

Extends and rotates VT to opposite side

104
Q

Multifidus

Innervation

A

Posterior rami of spinal nerves

105
Q

Multifidus

Blood supply

A

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal, subcostal, and lumbar arteries

Sacral part: Dorsal branches of lateral sacral arteries

106
Q

Rectus capitis posterior major

Origin

A

SP of C2 (axis)

107
Q

Rectus capitis posterior major

Insertion

A

Lateral inferior nuchal line of occipital bone

108
Q

Rectus capitis posterior major

Action

A

Extends head and rotates face to same side

109
Q

Rectus capitis posterior major

Innervation

A

Posterior ramus C1

110
Q

Rectus capitis posterior major

Blood supply

A

Occipital artery

111
Q

Rectus capitis posterior minor

Origin

A

Posterior tubercle of C1 (atlas)

112
Q

Rectus capitis posterior minor

Insertion

A

Medial inferior nuchal line of occipital bone

113
Q

Rectus capitis posterior minor

Action

A

Extends head

114
Q

Rectus capitis posterior minor

Innervation

A

Posterior ramus of C1

115
Q

Rectus capitis posterior minor

Blood supply

A

Occipital artery

116
Q

Obliquus capitis superior

Origin

A

TP of C1 (atlas)

inferior attachment

117
Q

Obliquus capitis superior

Insertion

A

Between lateral aspect of superior and inferior nuchal lines of occipital bone (superior attachment)

118
Q

Obliquus capitis superior

Action

A

Extends head

119
Q

Obliquus capitis superior

Innervation

A

Posterior ramus of C1

120
Q

Obliquus capitis superior

Blood supply

A

Occipital artery

121
Q

Obliquus capitis inferior

Origin

A

SP of C2 (axis)

122
Q

Obliquus capitis inferior

Insertion

A

TP of C1 (atlas)

123
Q

Obliquus capitis inferior

Action

A

Rotates face to same side

124
Q

Obliquus capitis inferior

Innervation

A

Posterior ramus of C1

125
Q

Obliquus capitis inferior

Blood supply

A

Occipital artery

Foundations (9 decks)

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