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Unit 1 Flashcards

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1
Q

Origin of the trapezius

A

medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7-T12 vertebrae

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2
Q

insertion of the trapezius

A

lateral third of clavicle; acromion and spine of scapula

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3
Q

innervation of trapezius

A

CN XI spinal accessory nerve (motor fibers) and C3 and C4 (pain and proprioceptive fibers)

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4
Q

actions of the trapezius (4)

A

DESC- elevates ASC- depresses MIDDLE/ALL- retracts scapula DESC & ASC- rotates glenoid cavity superiorly

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5
Q

origin of latissimus dorsi

A

spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs (~inferior angle of the scapula)

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6
Q

insertion of latissimus dorsi

A

floor of the intertubercular sulcus of the humerus

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7
Q

innervation of latissimus dorsi

A

thoracodorsal nerve (C6, C7, C8)

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8
Q

action of latissimus dorsi

A

Extends, adducts, and medially rotates humerus; raises body towards arms during climbing

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9
Q

origin of rhomboid major

A

spinous processes of T2-T5 vertebrae

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10
Q

insertion of rhomboid major

A

medial border of scapula from level of spine to inferior angle

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11
Q

innervation of rhomboid major

A

dorsal scapular nerve C4 C5

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12
Q

action of rhomboid major

A

retract scapula and rotate glenoid cavity inferiorly; fix scapula to thoracic wall

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13
Q

origin of rhomboid minor

A

spinous process of C7 and T1 vertebrae; nuchal ligament

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14
Q

insertion of rhomboid minor

A

smooth triangular area at the medial end of the scapular spine

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15
Q

innervation of rhomboid minor

A

dorsal scapular nerve C4 C5

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16
Q

action of rhomboid minor

A

retract scapula and rotate glenoid cavity inferiorly; fix scapula to thoracic wall

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17
Q

origin of levator scapulae

A

posterior tubercles of transverse processes of C1- C4 vertebrae

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18
Q

insertion of levator scapulae

A

medial border of scapula superior to the root of the scapular spine

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19
Q

innervation of lev scap

A

dorsal scapular C4 C5 and cervical C3 and C4

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20
Q

action of lev scap

A

elevate scapula and rotate glenoid cavity inferiorly by rotating scapula

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21
Q

origin of splenius cervicis

A

nuchal ligament and spinous process of C7- T6 vertebrae

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22
Q

insertion of splenius cervicis

A

tubercles of transverse processes of C1- C3 or C4 vertebrae

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23
Q

innervation of splenius cervicis

A

posterior rami of spinal nerves

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24
Q

action of splenius cervicis

A

alone: laterally flex and rotate head to side of active muscles together: extend head and neck

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25
origin of splenius capitis
nuchal ligament of spinous processes of C7-T6 vertebrae
26
insertion of splenius capitis
fibers run superolaterally to the mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone
27
innervation of splenius capitis
posterior rami of spinal nerves
28
action of splenius capitis
alone: laterally flex neck and rotate head to side of active muscles together: extend head and neck
29
origin of serratus posterior superior
nuchal ligament; spinous processes of C7- T3 vertebrae
30
insertion of serratus posterior superior
superior borders of 2nd to 4th ribs
31
innervation of serratus posterior superior
2nd to 5th intercostal nerves
32
action of serratus posterior superior
elevates ribs (proprioception)
33
origin of serratus posterior inferior
spinous processes of T11 to L2 vertebrae
34
insertion of serratus posterior inferior
inferior borders of 8th to 12th ribs near their angles
35
innervation of serratus posterior inferior ***
anterior rami of T9- T12 thoracic spinal nerves
36
action of serratus posterior inferior
depresses ribs (proprioception)
37
origin of iliocostalis
posterior surface of iliac crest, thoracolumbar fascia, sacral and lower lumbar spinous processes
38
insertion of iliocostalis
superior to angle of lower ribs; cervical transverse processes
39
innervation of iliocostalis
posterior rami of spinal nerves
40
action of iliocostalis
* Bilaterally contracted: aid in extension of appropriate spinal regions * Unilateral contraction: aids in lateral flexion of vertebral column
41
origin of longissimus
posterior surface of iliac crest, thoracolumbar fascia, sacral and lower lumbar spinous processes
42
insertion of longissimus
superior to ribs between tubercles and angles to the transverse processes of thoracic and cervical regions, mastoid process
43
innervation of longissimus
posterior rami of spinal nerves
44
action of longissimus
bilaterally: aid in extension of appropriate spinal regions unilaterally: aids in lateral flexion of vertebral column
45
origin of spinalis
supraspinous and nuchal ligament, spinous processes
46
insertion of spinalis
passes superomedially to adjacent spinous processes (4-6 segments)
47
innervation of spinalis
posterior rami of spinal nerves
48
action of spinalis
bilaterally: aide in extension of appropriate spinal regions unilaterally: aid in lateral flexion of vertebral column
49
origin of semispinalis (capitis and cervicis)
arises from the transverse processes of C4-T12 vertebrae
50
insertion of semispinalis
fibers run superomedially to occipital and spinous processes in thoracic and cervical regions, spanning 4-6 segments
51
innervation of semispinalis
posterior rami of spinal nerves
52
action of semispinalis
extends head and thoracic and cervical regions of the vertebral column and rotates them contralaterally
53
origin of interspinalis
superior surfaces of spinous processes of cervical and lumbar vertebrae
54
insertion of interspinalis
inferior surfaces of spinous processes of vertebrae superior to vertebrae of proximal attachment
55
innervation of interspinalis
posterior rami of spinal nerves
56
action of interspinalis
aid in extension and rotation of the spinal column
57
origin of intertransversarii
transverse processes of cervical and lumbar vertebrae
58
insertion of intertransversarii
transverse processes of adjacent vertebrae
59
innervation of intertransversarii ***
posterior and anterior rami of spinal nerves
60
action of intertransversarii
aid in lateral flexion of the vertebral column; bilaterally stabilize the VC
61
origin of multifidus
posterior sacrum, PSIS, sacro-iliac ligaments, mamillary processes of lumbar vertebrae, transverse processes of C4-C7
62
insertion of multifidus
fibers pass obliquely superomedially to the entire length of spinous processes, located 2-4 segments superior to the proximal attachment
63
innervation of multifidus (different branch)
medial branch of posterior dorsal ramus
64
action of multifidus
stabilizes vertebrae during local movements of the vertebral column
65
origin of rotatores
arises from the accessory process of lumbar vertebrae
66
insertion of rotatores
fibers pass superomedially to attach lamina, transverse processes, and spinous processes of vertebrae at a junction, immediately as a brevis, or 2 segments superior to vertebrae of attachment as a longus
67
innervation of rotatores
posterior rami of spinal nerves
68
action of rotatores
stabilize the vertebrae and assist with extension and rotatory movements of VC; may fx as organ of proprioception
69
origin levatores costarum
tips of transverse processes of C7 and T1-T11 vertebrae
70
insertion of levatores costarum
subadjacent ribs between the tubercle and the angle
71
innervation of levatores costarum (specific)
posterior rami of C8-T11 spinal nerves
72
action of levatores costarum
elevates ribs, assisting with respiration; lateral flexion assistance of vertebral column

Anatomy (6 decks)

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