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
2
Q
Trapezius Insertion
A
- Superior: Lateral 1/3 of clavicle
- Middle: Spine and acromion of scapula
- Inferior: Base of spine of scapula
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
4
Q
Trapezius Blood Supply
A
Superficial branch of transverse cervical artery
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
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
7
Q
Latissimus Dorsi Insertion
A
- Crest of lesser tubercle
- Floor of bicipital groove of humerus
8
Q
Latissimus Dorsi Innervation
A
Thoracodorsal nerve (posterior cord of brachial plexus, C6-C8 fibers)
9
Q
Latissimus Dorsi Blood Supply
A
Thoracodorsal artery (branch of subscapular artery)
10
Q
Latissimus Dorsi Action
A
Extension, medial rotation, and adduction of arm
11
Q
Levator Scapulae Origin
A
Posterior tubercles of TPs of C1-C3/C4
12
Q
Levator Scapulae Insertion
A
Medial border of scapula from superior angle to base of spine
13
Q
Levator Scapulae Innervation
A
- Ventral rami C3, C4 from deep branches of cervical plexus
- Twig from dorsal scapular nerve (C5)
14
Q
Levator Scapulae Blood Supply
A
Deep branch of transverse cervical artery
15
Q
Levator Scapulae Action
A
- Elevates and retracts scapula with trapezius
- Laterally flexes cervical vertebrae column when scapula is fixed
16
Q
Rhomboid Minor Origin
A
- Lower part of ligamentum nuchae
- Spinous processes of C7 and T1
17
Q
Rhomboid Minor Insertion
A
Medial border of scapula at base of spine
18
Q
Rhomboid Minor Innervation
A
Dorsal scapular nerve (C4, C5)
19
Q
Rhomboid Minor Blood Supply
A
Deep branch of transverse cervical artery
20
Q
Rhomboid Minor Action
A
- Elevates medial border of scapula
- Retracts scapula
- Rotation of scapula (downwards)
21
Q
Rhomboid Major Origin
A
Spinous processes of T2-T5
22
Q
Rhomboid Major Insertion
A
Medial border of scapula between base of spine and inferior angle
23
Q
Rhomboid Major Innervation
A
Dorsal scapular nerve (C4, C5)
24
Q
Rhomboid Major Blood Supply
A
Deep branch of the transverse cervical artery
25
Rhomboid Major Action
- Elevates medial border of scapula
- Retracts scapula
- Rotation of scapula (downwards)
26
Serratus Posterior Superior Origin
- Lower end of ligamentum nuchae
- Spinous processes of C7-T2/3
27
Serratus Posterior Superior Insertion
Ribs 2-5 lateral to angle
28
Serratus Posterior Superior Innervation
First four intercostal nerves (ventral Rami of first four thoracic nerves)
29
Serratus Posterior Superior Blood Supply
- Highest intercostal artery
- Posterior intercostal arteries
30
Serratus Posterior Superior Action
Elevates upper ribs during inspiration
31
Serratus Posterior Inferior Origin
SPs of T10-L2
32
Serratus Posterior Inferior Insertion
Lower 3-4 ribs lateral angles
33
Serratus Posterior Inferior Innervation
Lowest 4 intercostal nerves (ventral rami of lower thoracic)
34
Serratus Posterior Inferior Blood Supply
Posterior intercostal arteries
35
Serratus Posterior Inferior Action
Depresses lower ribs down and back during inspiration
36
Splenius Capitis Origin
- Caudal half of ligamentum nuchae
- SPs of C7-T3/4
37
Splenius Capitis Insertion
Mastoid process and occipital bone inferior to lateral 1/3 of superior nuchal line
38
Splenius Capitis Innervation
Dorsal Rami of middle cervical nerves
39
Splenius Capitis Blood Supply
- Muscular and descending branches of the occipital artery
- Superficial branch of the transverse cervical artery
40
Splenius Capitis Actions
- Unilaterally rotates the head and neck
- Bilaterally extends head and neck
41
Splenius Cervicis Origin
Narrow, tendinous band from SPs T3-6
42
Splenius Cervicis Insertion
Posterior tubercles of TPs of upper 2-3 cervical vertebrae
43
Splenius Cervicis Innervation
Doral rami lower cervical nerves
44
Splenius Cervicis Blood Supply
- Muscular and descending branches of occipital artery
- Superficial branch of transverse cervical artery
45
Splenius Cervicis Actions
- Unilaterally draws head to one side and slightly rotates
- Bilaterally extends head
46
Iliocostalis Lumborum Origin
Thoracolumbar fascia
47
Iliocostalis Lumborum Insertion
Lower borders of lower six or seven ribs near angles
48
Iliocostalis Lumborum Innervation
Dorsal rami of lumbar spinal nerves
49
Iliocostalis Lumborum Blood Supply
- Posterior intercostal arteries
- Lumbar arteries
50
Iliocostalis Lumborum Action
Extension and lateral flexion of vertebral column
51
Iliocostalis Thoracis Origin
Upper borders of lower six ribs medial to insertions of iliocostalis lumborum
52
Iliocostalis Thoracis Insertion
Upper six ribs and sometimes TPs of C7
53
Iliocostalis Thoracis Innervation
Dorsal rami of thoracic spinal nerves
54
Iliocostalis Thoracis Blood Supply
Posterior intercostal arteries
55
Iliocostalis Thoracis Action
Extension of vertebral column
56
Iliocostalis Cervicis Origin
Upper six ribs medial to insertion of iliocostalis thoracis
57
Iliocostalis Cervicis Insertion
TPs of C4-6
58
Iliocostalis Cervicis Innervation
Dorsal Rami of spinal nerves C4-6
59
Iliocostalis Cervicis Blood Supply
Posterior intercostal arteries
60
Iliocostalis Cervicis Action
Extension and lateral flexion of vertebral column
61
Longissimus Thoracis Origin
- Thoracolumbar fascia
- Accessory processes of lumbar vertebrae
62
Longissimus Thoracis Insertion
TPs of lower nine thoracic vertebrae and lower nine ribs
63
Longissimus Thoracis Innervation
Dorsal rami of spinal nerves T1-12
64
Longissimus Thoracis Blood Supply
Posterior intercostal and lumbar arteries
65
Longissimus Thoracis Action
Extension and lateral flexion of vertebral column
66
Longissimus Cervicis Origin
TPs of upper 4-6 thoracic vertebrae medial to insertion of longissimus thoracis
67
Longissimus Cervicis Insertion
TPs of C2-6
68
Longissimus Cervicis Innervation
Dorsal rami of spinal nerves C4-8
69
Longissimus Cervicis Blood Supply
Posterior intercostal arteries
70
Longissimus Cervicis Action
Extension and lateral flexion of vertebral column
71
Longissimus Capitis Origin
- Medial to upper border of longissimus cervicis
- Accessory processes of lower 4 cervical vertebrae
72
Longissimus Capitis Insertion
Posterior edge of mastoid process
73
Longissimus Capitis Innervation
Dorsal rami of spinal nerves C3-8
74
Longissimus Capitis Blood Supply
- Muscular branches of occipital arteries
- Deep cervical branch of costocervical trunk
75
Longissimus Capitis Action
- Bilaterally extends vertebral column
- Unilaterally rotates face laterally
76
Spinalis Thoracis Origin
Blends with longissimus Thoracis and arises from SPs of T11-L2
77
Spinalis Thoracis Insertion
SPs of upper 4-8 thoracic vertebrae
78
Spinalis Thoracis Innervation
Dorsal rami of T1-T12
79
Spinalis Thoracis Blood Supply
Posterior intercostal arteries
80
Spinalis Thoracis Action
Extension and lateral flexion of vertebral column
81
Semispinalis Capitis Origin
TPs of upper 6-7 thoracic vertebrae
82
Semispinalis Capitis Insertion
Occipital bone between superior and inferior nuchal lines
83
Semispinalis Capitis Innervation
Medial branches of dorsal rami C1-C6
84
Semispinalis Capitis Blood Supply
- Descending branch of occipital artery
- Deep branch of costocervical trunk
85
Semispinalis Capitis Actions
- Bilaterally extends neck
- Unilaterally turns face towards opposite side
