Back & Rotator Cuff Muscles Flashcards Preview

Foundations > Back & Rotator Cuff Muscles > Flashcards

Flashcards in Back & Rotator Cuff Muscles Deck (125):
1

Trapezius
Origin

- Superior Nuchal Line
- External occipital protuberance
- SP of C7 to T12

2

Trapezius
Insertion

- Lateral 1/3 of clavicle
- Acromion
- Spine of the scapula

3

Trapezius
Action

- Rotate and elevate scapula (superior part)
- retract scapula (middle)
- depress scapula (inferior)

4

Trapezius
innervation

Motor: spinal accessory nerve (CN XI)

Proprioception: Anterior/ventral rami of C3, C4

5

Trapezius, blood supply

Transverse cervical artery

6

Latissimus Dorsi
Origin

- SP T7-L5
- Thoracolumbar fascia
- sacrum
- iliac crest
- ribs 10-12

7

Latissimus dorsi
Insertion

Floor of the intertubercular sulcus of the humerus

8

Latissimus dorsi
Action

Extends, adducts, and medially rotates the humerus

9

Latissimus dorsi
Innervation

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

10

Latissimus dorsi
Blood supply

Thoracodorsal artery

11

Rhomboid major
Origin

SP T2-T5

12

Rhomboid major
Insertion

Medial border of scapula below its spine

13

Rhomboid major
Action

Retract and rotate scapula (to tilt glenoid cavity inferiorly)

14

Rhomboid major
Innervation

Dorsal scapular nerve (C5 of brachial plexus)

15

Rhomboid major
Blood supply

Dorsal scapular artery
(deep branch of transverse cervical artery)

16

Rhomboid minor
Origin

Ligamentum nuchae and SP C7-T1

17

Rhomboid minor
Insertion



Medial border of the scapula (at its spine)

18

Rhomboid minor
Action

Retract and rotate scapula (to tilt glenoid cavity inferiorly)

19

Rhomboid minor
Innervation

Dorsal scapular nerve (C5 of brachial plexus)

20

Rhomboid minor
Blood supply

Dorsal scapular artery

21

Levator scapulae
Origin

Transverse processes of C1-C4

22

Levator scapulae
Insertion

Superior angle of the scapula

23

Levator scapulae
Action

Elevates and rotates the scapula

(to tilt the glenoid cavity inferiorly)

24

Levator scapulae
Innervation

Dorsal scapular nerve (C5 of brachial plexus)

25

Levator scapulae
Blood supply

Dorsal scapular artery
(deep branch of transverse cervical artery)

26

Deltoid
Origin

- Spine of the scapula
- Acromion of the scapula
- Lateral 1/3 of the clavicle

27

Deltoid
Insertion

Deltoid tuberosity of the humerus

28

Deltoid
Action

Abducts, flexes, and extends the humerus

29

Deltoid
Innervation

Axillary nerve

30

Deltoid
Blood supply

Posterior circumflex humeral artery

31

Supraspinatus
Origin

Supraspinous fossa of the scapula

32

Supraspinatus
Insertion

Superior facet of the greater tubercle of the humerus

33

Supraspinatus
Action

Abducts the humerus (mostly first 15 degrees)

34

Supraspinatus
Innervation

Suprascapular nerve (C5, C6 of brachial plexus)

35

Supraspinatus
Blood supply

Suprascapular artery

36

Infraspinatus
Origin

Infraspinous fossa of scapula

37

Infraspinatus
Insertion

Middle facet of the greater tubercle of the humerus

38

Infraspinatus
Action

Laterally rotates humerus

39

Infraspinatus
Innervation

Suprascapular nerve (C5, C6 of brachial plexus)

40

Infraspinatus
Blood supply

Supracapular artery

41

Subscapularis
Origin

Subscapular fossa of scapula

42

Subscapularis
Insertion

Lesser tubercle of the humerus

43

Subscapularis
Action

Medially rotates the humerus

44

Subscapularis
Innervation

Upper subscapular nerve & lower subscapular nerve

(C5 and C6 of brachial plexus, respectively)

45

Subscapularis
Blood supply

Subscapular artery

46

Teres major
Origin

Inferior angle of the scapula

47

Teres major
Insertion

Medial lip of the intertubercular sulcus of the humerus

48

Teres major
Action

Adducts and medially rotates the humerus

49

Teres major
Innervation

Lower subscapular nerve (C6 of brachial plexus)

50

Teres major
Blood supply

Subscapular and circumflex scapular arteries

51

Teres minor
Origin

Lateral border of the scapula

52

Teres minor
Insertion

Inferior facet of the greater tubercle of the humerus

53

Teres minor
Action

Laterally rotates the humerus

54

Teres minor
Innervation

Axillary nerve

55

Teres minor
Blood supply

Subscapular and circumflex scapular arteries

56

Serratus posterior superior
Origin

SP C7–T3

This is one of two intermediate muscles of the back

57

Serratus posterior superior
Insertion

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

58

Serratus posterior superior
Action

Elevates ribs 2–5

59

Serratus posterior superior
Innervation

Anterior rami of T2–T5

60

Serratus posterior superior
Blood supply

Posterior Intercostal arteries

61

Serratus posterior inferior
Origin

SP T11–L2

This is one of two intermediate muscles of the back

62

Serratus posterior inferior
Insertion

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

63

Serratus posterior inferior
Action

Depresses ribs 9–12

64

Serratus posterior inferior
Innervation

Anterior rami (ventral rami) of T9–T12

65

Serratus posterior inferior
Blood supply

Posterior Intercostal arteries

66

Splenius capitis
Origin

Ligamentum nuchae
SP C7-T4

67

Splenius capitis
Insertion

- Mastoid process
- Lateral one-third of superior nuchal line

68

Splenius capitis
Action

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

Bilateral—extends head and neck

69

Splenius capitis
Innervation

Posterior (dorsal) rami of middle cervical nerves

70

Splenius capitis
Blood supply

Deep cervical artery & Descending branch of occipital artery

71

Splenius cervicis
Origin

SP T3–T6

72

Splenius cervicis
Insertion

TP C1–C3

73

Splenius cervicis
Action

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

Bilateral—extends head and neck

74

Splenius cervicis
Innervation

Posterior (dorsal) rami of middle cervical nerves

75

Splenius cervicis
Blood supply

Deep cervical artery & Descending branch of occipital artery

76

Erector spinae (Spinalis)
Origin

- Median sacral crest
- Posterior surface sacrum
- SP L and lower T
- Medial part iliac crest

77

Erector spinae (Spinalis)
Insertion

SP of T and C

78

Erector spinae (Spinalis)
Action

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

79

Erector spinae (Spinalis)
Innervation

Posterior rami of lower cervical nerves

80

Erector spinae (Spinalis)
Blood supply

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

Erector spinae (Longissimus)
Origin

- Median sacral crest
- Posterior surface sacrum
- SP L and lower T
- Medial part iliac crest

82

Erector spinae (Longissimus)
Insertion

- Between tubercles and angles of ribs
- TP of T and C

83

Erector spinae (Longissimus)
Action

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

84

Erector spinae (Longissimus)
Innervation

Posterior rami of lower cervical nerves

85

Erector spinae (Longissimus)
Blood supply

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

Erector spinae (Iliocostalis)
Origin

- Median sacral crest
- Posterior surface sacrum
- SP L and lower T
- Medial part iliac crest

87

Erector spinae (Iliocostalis)
Insertion

Angles of lower ribs and TP of C

88

Erector spinae (Iliocostalis)
Action

Unilateral—laterally flexes VT to same side

Bilateral—extends VT and head, stabilizes VT

89

Erector spinae (Iliocostalis)
Innervation

Posterior rami of lower cervical nerves

90

Erector spinae (Iliocostalis)
Blood supply

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

Semispinalis capitis
Origin

- TP C7–T6/T7
- AP C4–C6

92

Semispinalis capitis
Insertion

Between superior and inferior nuchal lines of occipital bone medially

93

Semispinalis capitis
Action

Unilateral—extends and laterally rotates head to opposite side

Bilateral—extends head

94

Semispinalis capitis
Innervation

Posterior rami of spinal nerves

95

Semispinalis capitis
Blood supply

Occipital, deep cervical, & vertebral arteries

96

Semispinalis cervicis
Origin

TP T1–T5/T6

97

Semispinalis cervicis
Insertion

SP C2–C5

98

Semispinalis cervicis
Action

Unilateral—extends and laterally rotates neck to opposite side

Bilateral—extends neck

99

Semispinalis cervicis
Innervation

Posterior rami of spinal nerves

100

Semispinalis cervicis
Blood supply

Cervical part : Occipital, deep cervical, & vertebral arteries

Thoracic part: Dorsal branches of posterior intercostal arteries

101

Multifidus
Origin

- Sacrum
- Ilium
- TP T1–L5
- AP C4–C7

102

Multifidus
Insertion

SP L5–C2

103

Multifidus
Action

Extends and rotates VT to opposite side

104

Multifidus
Innervation

Posterior rami of spinal nerves

105

Multifidus
Blood supply

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

Rectus capitis posterior major
Origin

SP of C2 (axis)

107

Rectus capitis posterior major
Insertion

Lateral inferior nuchal line of occipital bone

108

Rectus capitis posterior major
Action

Extends head and rotates face to same side

109

Rectus capitis posterior major
Innervation

Posterior ramus C1

110

Rectus capitis posterior major
Blood supply

Occipital artery

111

Rectus capitis posterior minor
Origin

Posterior tubercle of C1 (atlas)

112

Rectus capitis posterior minor
Insertion

Medial inferior nuchal line of occipital bone

113

Rectus capitis posterior minor
Action

Extends head

114

Rectus capitis posterior minor
Innervation

Posterior ramus of C1

115

Rectus capitis posterior minor
Blood supply

Occipital artery

116

Obliquus capitis superior
Origin

TP of C1 (atlas)
(inferior attachment)

117

Obliquus capitis superior
Insertion

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

118

Obliquus capitis superior
Action

Extends head

119

Obliquus capitis superior
Innervation

Posterior ramus of C1

120

Obliquus capitis superior
Blood supply

Occipital artery

121

Obliquus capitis inferior
Origin

SP of C2 (axis)

122

Obliquus capitis inferior
Insertion

TP of C1 (atlas)

123

Obliquus capitis inferior
Action

Rotates face to same side

124

Obliquus capitis inferior
Innervation

Posterior ramus of C1

125

Obliquus capitis inferior
Blood supply

Occipital artery