1-26 Deep Back Flashcards Preview

Marrow and Movement > 1-26 Deep Back > Flashcards

Flashcards in 1-26 Deep Back Deck (43):
1

dorsal rami innervates what?

- intrinsic muscles of the back

2

Iliocostalis (Erector Spinae)

Origin: broad tenon from iliac crest, posterior surface of sacrum, sacroiliac ligaments, sacral and inferior lumbar spinous processes, and supraspinous ligament

Insertion: angles of lower ribs and cervical transverse processes

Innervation: posterior rami of spinal nerves

Action: bilaterally- extend vertebral column and head unilaterally- laterally flex vertebral column

3

sensory fibers go through ___ root, and motor fibers go through ___ root

- dorsal (dorsal root --> doral root ganglion --> spinal nerve --> dorsal and ventral primary rami - ventral (ventral root --> spinal nerve --> dorsal and ventral primary rami)

4

anterior and posterior internal vertebral venous plexus

- branches off of intervertebral vein into body of vertebrae (anterior) and vertebral arch/laminae (posterior) - valveless, so it can see metastases/cancer v easily

5

nuchal ligament

supraspinous ligament get thicker when it reaches the neck/cervical region

6

Longissimus (Erector Spinae)

Origin: broad tenon from iliac crest, posterior surface of sacrum, sacroiliac ligaments, sacral and inferior lumbar spinous processes, and supraspinous ligament

Insertion: transverse processes in thoracic and cervical regions and mastoid process of temporal bone

Innervation: posterior rami of spinal nerves

Action: bilaterally- extend vertebral column and head unilaterally- laterally flex vertebral column

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8

anterior longitudinal ligament

runs along the anterior body of vertebrae

9

filum terminale

- thin extension of pia mater beyond the spinal cord that extends all the way to the end of the dural sac

10

Semispinalis Capitis

Origin: transverse processes of C4-T7

Insertion: occipital bone and spinous processes in upper thoracic and cervical regions

Innervation: posterior rami of spinal nerves

Action: extend head and thoracic and cervical regions of certebral column and rotates them contralaterally

11

Deep muscles are surrounded by compartments of the ___?

thoracolumbar fascia

12

Deep back pain/muscle spasm

- if there is vertebral misalignment, damage, the opposite side of the spine will reflexively contract to overcompensate the alignment of the spine, which will cause a muscle spasm in that local area

13

intervertebral vein

- composed of anterior and posterior spinal vein and pial venous plexus vein

14

interspinous ligaments

runs betwens spine of adjacent vertebrae

15

Spinalis (Erector Spinae)

Origin: broad tenon from iliac crest, posterior surface of sacrum, sacroiliac ligaments, sacral and inferior lumbar spinous processes, and supraspinous ligament

Insertion: spinous process of upper thoracic region and cranium

Innervation: posterior rami of spinal nerves

Action: bilaterally- extend vertebral column and head unilaterally- laterally flex vertebral column to the same side

16

denticulate ligaments

- extensions of pia mater at regular intervals of spinal cord that keep spinal cord from moving laterally - not present after conus medullaris

17

cauda equina

- nerve roots that extend after conus medullaris

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19

dura mater

- thick outer covering of spinal cord - extends all the way to the end of the vertebral column - stabilized in place by fusing with perineurium of spinal nerves

20

pia mater

- innermost covering of spinal cord - continues past the spinal cord to form a small tip called filum terminale - anchors the spinal cord in shape via denticulate ligaments

21

conus medullaris

- terminal part of spinal cord in which spinal cord tapers to a point - stops at intervertebral disc between L1-L2

22

Splenius Capitis

Origin: nuchal ligament and C7-T3/4 spinal processes

Insertion: mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone

Innervation: posterior rami of spinal nerves

Action: laterally flex neck and rotate head to the side (with cervicis, extend head and neck)

23

T6 nerve exits through the intervertebral foramen under which vertebrae?

T6

24

arachnoid mater

- very thin, middle covering outside of spinal cord (web-like filaments) - cerebrospinal fluid is in subarachnoid space

25

posterior longitudinal ligament

runs posteriorly to the body of vertebrae but within the vertebral canal (anterior to the spine)

26

What is the extradural space made of?

- fat and blood vessels

27

nucleus pulposis

- gelatinous center of intervertebral disc that compresses and allows for shock absorption of spine - squishes based on movement of spine for shock absorption

28

Intervertebral disc

- in between adjacent bodies of vertebrae - comprise 25% of the vertebral column - composed of thicker outer anulus fibrosis and gelatinous nucleus pulposis

29

ventral rami innervates what?

- antero-lateral trunk muscles and the extremities

30

anterior and posterior segmental medullary arteries

- radicular arteries that DO anastamose with anterior spinal artery (supply this artery) - supplies deep core of spine

31

Erector spinae group and transversospinal group work together to __?

- maintain upright/erect posture of the spine

32

whiplash

- head hyper extends --> torn anterior longitudinal ligament - then head can hyperflex --> torn nuchal ligament

33

Splenius Cervicis

Origin: nuchal ligament and C7-T3/4 spinal processes

Insertion: tubercles of transverse spinous processes C1- C3/4 vertebrae

Innervation: posterior rami of spinal nerves

Action: laterally flex neck and rotate head to the side (with capitis, extend head and neck)

34

anterior and posterior radicular arteries

- arteries that supply lateral spine - do NOT anastamose with anterior spinal artery

35

supraspinous ligament

runs along the posterior of vertebral spine

36

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37

anulus fibrosis

- thick, outer circular connective tissue of intervertebral disc - protects nucleus pulposus

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39

Transversospinal Group

Origin: have a general origin from laterally placed transverse processes of lower vertebrae

Insertion: have a general insertion on a medially placed spinous process of superior vertebrae

Innervation: dorsal ramus of spinal n.

Action: Bilaterally: extend the vertebral column; unilaterally: rotate to contralateral side

40

Where does the spinal cord end in adults/ Below where can you do a lumbar puncture?

- intervertebral disc between L1 and L2

41

herniated disc

- nucleus pulposis bulges to the extent that it protrudes into the intervertebral foramen - compresses spinal nerves in intervertebral foramen - will cause radiating pain to all areas that spinal nerve innervates

42

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43

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