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Gross II > Vertebral Canal > Flashcards

Vertebral Canal Flashcards

1
Q

Where does the thecal sac attach to

A 
Rim of Foramen magnum
Bodies of C2-3
Hoffmans ligaments
Dural sleeves along spinal nerves
Filum Dura
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2
Q

What are Hoffmans ligaments

A

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

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3
Q

What are dural sleeves continuous with

A

continuos with epinurium of spinal nerves through IVFs

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4
Q

Where does the thecal sac taper and end at

A

S2 vertebral segment

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5
Q

What is the Filum Dura

A

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

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6
Q

What is the epidural space

A

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

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7
Q

What is the spinal arachnoid continuous with

A

perineurium of spinal nerves

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8
Q

Where does the spinal arachnoid end

A

S2 vertebral segment

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9
Q

What is the Spinal Pia

A

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

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10
Q

What anchors the spinal cord along its length

A

Denticulate ligaments

Filum Terminale

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11
Q

What are denticulate ligaments

A

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

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12
Q

What is the Filum terminale

A

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

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13
Q

What is the lumbar cistern

A

portion of subarachnoid space inferior to he conus medullaris

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14
Q

What is the lumbar cistern filled with

A

CSF

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15
Q

Where does the lumbar cistern extend from

A

L1/2- S2 vertebral level

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16
Q

What does the lumbar cistern contain

A

the cauda equina

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17
Q

What secretes the CSF

A

The Choroid Plexus in the brain ventricular system

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18
Q

Which space is the CSF circulated through

A

Subarachnoid space - around the brain and spinal cord

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19
Q

How does the CSF circulate

A

Mainly from movements of the spinal column

Also from continued CSF secretion and resorption and pulsating arteries in subarachnoid space

20
Q

How often is the CSF replaced

A

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

21
Q

What is present for CSF resorption

A

Arachnoid villi

22
Q

What are arachnoid villi

A

tufts of arachnoid that extend into the dural venous sinus system

23
Q

How do Arachnoid villi resorb CSF

A

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

24
Q

Where are most arachnoid villi found

A

superior sagittal sinus

25
Q

What clinical conditions are a result of arachnoid villi

A

Arachnoid granulations-hypertrophied arachnoid villi

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

26
Q

How is the vertebral column supplied with blood

A

segmental vessels

27
Q

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

A

segmental vessels from the intercostal arteries and veins

28
Q

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

A

segmental vessels from the lumbar arteries and veins

29
Q

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

A

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

30
Q

Where do spinal branches of segmental arteries arise from

A

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

31
Q

What do the spinal branches of segmental arteries supply

A

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

32
Q

What are the two parts of the vertebral venous plexus

A

external vertebral plexus

internal vertebral plexus

33
Q

Where is the external vertebral plexus distributed to

A

the external part of vertebral column and deep paraspinal tissue

34
Q

Where is the internal vertebral plexus distributed to

A

within the epidural space of the vertebral canal

35
Q

How many parts does each vertebral venous plexus have

A

2 an anterior and a posterior

36
Q

Where do the vertebral venous plexus drain to

A

drain into spinal veins

37
Q

What are basivertebral veins

A

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

38
Q

What is the clinical significance of the venous anastomoses

A

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

39
Q

How is the ventral compartment tissue innervated

A

branches of gray rami communicantes of the sympathetic chain

branches of ventral rami of spinal nerves

40
Q

What doe the ventral compartment innervations supply

A 
anterior and lateral parts of spine:
ALL
out anulus fibrosus of IVDs
periosteum of vertebral bodies
vertebral bodies
41
Q

What is another name for the recurrent meningeal nerve

A

sinu vertebral nerve

42
Q

What is the recurrent meningeal nerve formed from

A

somatic root: ventral ramus of spinal nerve

autonomic root: from gray rami communicantes

43
Q

What does the recuurent meningeal nerve innervate

A

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

44
Q

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

A

3 lateral, intermediate, and medial

45
Q

What does the lateral branch of the dorsal compartment innervate

A

skin of lateral back

iliocostalis

46
Q

What does the intermediate branch of the dorsal compartment innervate

A

no cutaneous

longissimus

47
Q

What does the medial branch of the dorsal compartment innervate

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

Gross II (13 decks)

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