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Gross Anatomy > Origins, Insertions, Actions, Innervations, Blood Supply > Flashcards

Origins, Insertions, Actions, Innervations, Blood Supply Flashcards

1
Q

Trapezius Origin

A
  • External Occipital Protuberance
  • Medial 1/3 of superior nuchal line
  • Ligamentum nuchae
  • Spinous processes of C7-T12
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2
Q

Trapezius Insertion

A
  • Superior: Lateral 1/3 of clavicle
  • Middle: Spine and acromion of scapula
  • Inferior: Base of spine of scapula
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3
Q

Trapezius Innervation

A
  • Spinal accessory nerve
  • Ventral rami of 3rd and 4th cervical nerves
  • CN XI and C3/C4 fibers form subtrapezial plexus on deep surface of muscle
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4
Q

Trapezius Blood Supply

A

Superficial branch of transverse cervical artery

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5
Q

Trapezius Actions

A
  • Raises, retracts, and rotates scapula
  • Bilateral contraction of superior fibers extends head
  • Unilateral contraction of upper fibers laterally flexes head and cervical vertebrae
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6
Q

Latissimus Dorsi Origin

A
  • Spinous processes of T7-T12
  • All lumbar and sacral vertebrae (SPs)
  • Posterior part of iliac crest
  • From lower 3-4 ribs via muscular slips that interdigitate with external oblique muscle
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7
Q

Latissimus Dorsi Insertion

A
  • Crest of lesser tubercle
  • Floor of bicipital groove of humerus
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8
Q

Latissimus Dorsi Innervation

A

Thoracodorsal nerve (posterior cord of brachial plexus, C6-C8 fibers)

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9
Q

Latissimus Dorsi Blood Supply

A

Thoracodorsal artery (branch of subscapular artery)

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10
Q

Latissimus Dorsi Action

A

Extension, medial rotation, and adduction of arm

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11
Q

Levator Scapulae Origin

A

Posterior tubercles of TPs of C1-C3/C4

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12
Q

Levator Scapulae Insertion

A

Medial border of scapula from superior angle to base of spine

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13
Q

Levator Scapulae Innervation

A
  • Ventral rami C3, C4 from deep branches of cervical plexus
  • Twig from dorsal scapular nerve (C5)
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14
Q

Levator Scapulae Blood Supply

A

Deep branch of transverse cervical artery

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15
Q

Levator Scapulae Action

A
  • Elevates and retracts scapula with trapezius
  • Laterally flexes cervical vertebrae column when scapula is fixed
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16
Q

Rhomboid Minor Origin

A
  • Lower part of ligamentum nuchae
  • Spinous processes of C7 and T1
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17
Q

Rhomboid Minor Insertion

A

Medial border of scapula at base of spine

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18
Q

Rhomboid Minor Innervation

A

Dorsal scapular nerve (C4, C5)

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19
Q

Rhomboid Minor Blood Supply

A

Deep branch of transverse cervical artery

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20
Q

Rhomboid Minor Action

A
  • Elevates medial border of scapula
  • Retracts scapula
  • Rotation of scapula (downwards)
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21
Q

Rhomboid Major Origin

A

Spinous processes of T2-T5

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22
Q

Rhomboid Major Insertion

A

Medial border of scapula between base of spine and inferior angle

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23
Q

Rhomboid Major Innervation

A

Dorsal scapular nerve (C4, C5)

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24
Q

Rhomboid Major Blood Supply

A

Deep branch of the transverse cervical artery

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25
Q

Rhomboid Major Action

A
  • Elevates medial border of scapula
  • Retracts scapula
  • Rotation of scapula (downwards)
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26
Q

Serratus Posterior Superior Origin

A
  • Lower end of ligamentum nuchae
  • Spinous processes of C7-T2/3
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27
Q

Serratus Posterior Superior Insertion

A

Ribs 2-5 lateral to angle

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28
Q

Serratus Posterior Superior Innervation

A

First four intercostal nerves (ventral Rami of first four thoracic nerves)

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29
Q

Serratus Posterior Superior Blood Supply

A
  • Highest intercostal artery
  • Posterior intercostal arteries
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30
Q

Serratus Posterior Superior Action

A

Elevates upper ribs during inspiration

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31
Q

Serratus Posterior Inferior Origin

A

SPs of T10-L2

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32
Q

Serratus Posterior Inferior Insertion

A

Lower 3-4 ribs lateral angles

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33
Q

Serratus Posterior Inferior Innervation

A

Lowest 4 intercostal nerves (ventral rami of lower thoracic)

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34
Q

Serratus Posterior Inferior Blood Supply

A

Posterior intercostal arteries

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35
Q

Serratus Posterior Inferior Action

A

Depresses lower ribs down and back during inspiration

36
Q

Splenius Capitis Origin

A
  • Caudal half of ligamentum nuchae
  • SPs of C7-T3/4
37
Q

Splenius Capitis Insertion

A

Mastoid process and occipital bone inferior to lateral 1/3 of superior nuchal line

38
Q

Splenius Capitis Innervation

A

Dorsal Rami of middle cervical nerves

39
Q

Splenius Capitis Blood Supply

A
  • Muscular and descending branches of the occipital artery
  • Superficial branch of the transverse cervical artery
40
Q

Splenius Capitis Actions

A
  • Unilaterally rotates the head and neck
  • Bilaterally extends head and neck
41
Q

Splenius Cervicis Origin

A

Narrow, tendinous band from SPs T3-6

42
Q

Splenius Cervicis Insertion

A

Posterior tubercles of TPs of upper 2-3 cervical vertebrae

43
Q

Splenius Cervicis Innervation

A

Doral rami lower cervical nerves

44
Q

Splenius Cervicis Blood Supply

A
  • Muscular and descending branches of occipital artery
  • Superficial branch of transverse cervical artery
45
Q

Splenius Cervicis Actions

A
  • Unilaterally draws head to one side and slightly rotates
  • Bilaterally extends head
46
Q

Iliocostalis Lumborum Origin

A

Thoracolumbar fascia

47
Q

Iliocostalis Lumborum Insertion

A

Lower borders of lower six or seven ribs near angles

48
Q

Iliocostalis Lumborum Innervation

A

Dorsal rami of lumbar spinal nerves

49
Q

Iliocostalis Lumborum Blood Supply

A
  • Posterior intercostal arteries
  • Lumbar arteries
50
Q

Iliocostalis Lumborum Action

A

Extension and lateral flexion of vertebral column

51
Q

Iliocostalis Thoracis Origin

A

Upper borders of lower six ribs medial to insertions of iliocostalis lumborum

52
Q

Iliocostalis Thoracis Insertion

A

Upper six ribs and sometimes TPs of C7

53
Q

Iliocostalis Thoracis Innervation

A

Dorsal rami of thoracic spinal nerves

54
Q

Iliocostalis Thoracis Blood Supply

A

Posterior intercostal arteries

55
Q

Iliocostalis Thoracis Action

A

Extension of vertebral column

56
Q

Iliocostalis Cervicis Origin

A

Upper six ribs medial to insertion of iliocostalis thoracis

57
Q

Iliocostalis Cervicis Insertion

A

TPs of C4-6

58
Q

Iliocostalis Cervicis Innervation

A

Dorsal Rami of spinal nerves C4-6

59
Q

Iliocostalis Cervicis Blood Supply

A

Posterior intercostal arteries

60
Q

Iliocostalis Cervicis Action

A

Extension and lateral flexion of vertebral column

61
Q

Longissimus Thoracis Origin

A
  • Thoracolumbar fascia
  • Accessory processes of lumbar vertebrae
62
Q

Longissimus Thoracis Insertion

A

TPs of lower nine thoracic vertebrae and lower nine ribs

63
Q

Longissimus Thoracis Innervation

A

Dorsal rami of spinal nerves T1-12

64
Q

Longissimus Thoracis Blood Supply

A

Posterior intercostal and lumbar arteries

65
Q

Longissimus Thoracis Action

A

Extension and lateral flexion of vertebral column

66
Q

Longissimus Cervicis Origin

A

TPs of upper 4-6 thoracic vertebrae medial to insertion of longissimus thoracis

67
Q

Longissimus Cervicis Insertion

A

TPs of C2-6

68
Q

Longissimus Cervicis Innervation

A

Dorsal rami of spinal nerves C4-8

69
Q

Longissimus Cervicis Blood Supply

A

Posterior intercostal arteries

70
Q

Longissimus Cervicis Action

A

Extension and lateral flexion of vertebral column

71
Q

Longissimus Capitis Origin

A
  • Medial to upper border of longissimus cervicis
  • Accessory processes of lower 4 cervical vertebrae
72
Q

Longissimus Capitis Insertion

A

Posterior edge of mastoid process

73
Q

Longissimus Capitis Innervation

A

Dorsal rami of spinal nerves C3-8

74
Q

Longissimus Capitis Blood Supply

A
  • Muscular branches of occipital arteries
  • Deep cervical branch of costocervical trunk
75
Q

Longissimus Capitis Action

A
  • Bilaterally extends vertebral column
  • Unilaterally rotates face laterally
76
Q

Spinalis Thoracis Origin

A

Blends with longissimus Thoracis and arises from SPs of T11-L2

77
Q

Spinalis Thoracis Insertion

A

SPs of upper 4-8 thoracic vertebrae

78
Q

Spinalis Thoracis Innervation

A

Dorsal rami of T1-T12

79
Q

Spinalis Thoracis Blood Supply

A

Posterior intercostal arteries

80
Q

Spinalis Thoracis Action

A

Extension and lateral flexion of vertebral column

81
Q

Semispinalis Capitis Origin

A

TPs of upper 6-7 thoracic vertebrae

82
Q

Semispinalis Capitis Insertion

A

Occipital bone between superior and inferior nuchal lines

83
Q

Semispinalis Capitis Innervation

A

Medial branches of dorsal rami C1-C6

84
Q

Semispinalis Capitis Blood Supply

A
  • Descending branch of occipital artery
  • Deep branch of costocervical trunk
85
Q

Semispinalis Capitis Actions

A
  • Bilaterally extends neck
  • Unilaterally turns face towards opposite side

Gross Anatomy (8 decks)

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