Vertebral Canal Flashcards Preview

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Flashcards in Vertebral Canal Deck (47):
1

Where does the thecal sac attach to

Rim of Foramen magnum
Bodies of C2-3
Hoffmans ligaments
Dural sleeves along spinal nerves
Filum Dura

2

What are Hoffmans ligaments

ligamentous slips along the length of the sac that attach the dura to PLL from C7-L5

3

What are dural sleeves continuous with

continuos with epinurium of spinal nerves through IVFs

4

Where does the thecal sac taper and end at

S2 vertebral segment

5

What is the Filum Dura

dural coccygeal ligament that extends from bottom of thecal sac through sacral canal and attaches to coccyx

6

What is the epidural space

space between thecal sac and borders of vertebral canal
contains loose CT adipose and vessels
important when performing epidural anesthesia

7

What is the spinal arachnoid continuous with

perineurium of spinal nerves

8

Where does the spinal arachnoid end

S2 vertebral segment

9

What is the Spinal Pia

Layer that intimately follows the spinal cord surface and extends along the rootlets of spinal nerves to the IVFs

10

What anchors the spinal cord along its length

Denticulate ligaments
Filum Terminale

11

What are denticulate ligaments

extend from lateral surface of spinal cord and attach to thecal sac
Have serrated edge appearance

12

What is the Filum terminale

filament like ligament of pia that extends from bottom of spinal cord to the bottom of thecal sac

13

What is the lumbar cistern

portion of subarachnoid space inferior to he conus medullaris

14

What is the lumbar cistern filled with

CSF

15

Where does the lumbar cistern extend from

L1/2- S2 vertebral level

16

What does the lumbar cistern contain

the cauda equina

17

What secretes the CSF

The Choroid Plexus in the brain ventricular system

18

Which space is the CSF circulated through

Subarachnoid space - around the brain and spinal cord

19

How does the CSF circulate

Mainly from movements of the spinal column
Also from continued CSF secretion and resorption and pulsating arteries in subarachnoid space

20

How often is the CSF replaced

3-4 times daily, always ~150mL in system

21

What is present for CSF resorption

Arachnoid villi

22

What are arachnoid villi

tufts of arachnoid that extend into the dural venous sinus system

23

How do Arachnoid villi resorb CSF

CSF diffuses directly into the dural venous sinus and mixes with the venous blood

24

Where are most arachnoid villi found

superior sagittal sinus

25

What clinical conditions are a result of arachnoid villi

Arachnoid granulations-hypertrophied arachnoid villi
Fovea Granulares- pit like depressions of inner surface of cranial cavity from arachnoid granulations

26

How is the vertebral column supplied with blood

segmental vessels

27

Where does blood supply of vertebra in the thoracic region come from

segmental vessels from the intercostal arteries and veins

28

Where does blood supply of vertebra in the lumbar region come from

segmental vessels from the lumbar arteries and veins

29

Where does the blood supply of vertebra in the cervical region come from

segmental vessels that are branches of arteries and veins of the deep neck

30

Where do spinal branches of segmental arteries arise from

Dorsal branch of the segmental arteries, enter vertebral canal via the IVF

31

What do the spinal branches of segmental arteries supply

vertebrae and other paraspinal tissues
outer part of anulus fibrosus
nerve rootlets
variably the spinal cord

32

What are the two parts of the vertebral venous plexus

external vertebral plexus
internal vertebral plexus

33

Where is the external vertebral plexus distributed to

the external part of vertebral column and deep paraspinal tissue

34

Where is the internal vertebral plexus distributed to

within the epidural space of the vertebral canal

35

How many parts does each vertebral venous plexus have

2 an anterior and a posterior

36

Where do the vertebral venous plexus drain to

drain into spinal veins

37

What are basivertebral veins

veins within the vertebral body that drain blood into the internal and external vertebral plexuses
(can create large holes in the vertebra)

38

What is the clinical significance of the venous anastomoses

veins of the plexus lack valves, therefore connections with all levels of the body

39

How is the ventral compartment tissue innervated

branches of gray rami communicantes of the sympathetic chain
branches of ventral rami of spinal nerves

40

What doe the ventral compartment innervations supply

anterior and lateral parts of spine:
ALL
out anulus fibrosus of IVDs
periosteum of vertebral bodies
vertebral bodies

41

What is another name for the recurrent meningeal nerve

sinu vertebral nerve

42

What is the recurrent meningeal nerve formed from

somatic root: ventral ramus of spinal nerve
autonomic root: from gray rami communicantes

43

What does the recuurent meningeal nerve innervate

posterior part of anulus fibrosus of IVD
periosteum of posterior vertebral bodies
vertebral bodies
PLL
ventral part of thecal sac and dural sleeves

44

How many branches of the dorsal primary rami innervate the dorsal compartment tissue

3 lateral, intermediate, and medial

45

What does the lateral branch of the dorsal compartment innervate

skin of lateral back
iliocostalis

46

What does the intermediate branch of the dorsal compartment innervate

no cutaneous
longissimus

47

What does the medial branch of the dorsal compartment innervate

skin of midline back
medial group of muscles in back
supraspinous ligament
interspinous ligiament
zygopophyseal joints