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Maris Spinal anatomy > IVD > Flashcards

IVD Flashcards

1
Q

ivd constitutes % of entire height of spinal column

A

25%

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2
Q

how many ivds in spinal column

A

24

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3
Q

how many ivds in spine

A

23

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4
Q

the ivd is bigger anterior in what areas

A

cervical and lumbar spines

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5
Q

what are the components of the ivd

A

annulus fibrosus
nucleus pulposus
vertebral (cartilage) end plates

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6
Q

the nucleus pulposus is remnant of

A

notochord

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7
Q

annulus fibrosus made up of # concentric fibrocartilagenous rings/lamellae

A

12-20

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8
Q

outermost lamella run () degrees from the horizontal plane THE ODD NUMBER

A

30 degrees

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9
Q

most superficial lamellae attach directly to the vertebral bodies via

A

epiphyseal rings via sharpey’s fibers

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10
Q

what are the pain fibers

A

periosteum not sharpeys

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11
Q

annulus fibrosus is predominately what type of collagen

A

type 1 collagen (what u see in tendons) 50-60%

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12
Q

what is the load bearing structure of the ivd

A

annulus fibrosus

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13
Q

the nucleus pulposus is slightly () in the lumbar spine

A

posterior

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14
Q

the nucleus pulposus and annulus fibrosus is thickest in

A

cervical and lumbar spines

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15
Q

nucleus pulposus contains () collagen

A

type 2 collagen (seen in articular cartilage) 15-20%

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16
Q

the nucleus pulposus contains

A

proteoglycans and GAGS (glycoaminoglycans) 65%

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17
Q

what are GAGS

A

precurosors for proteoglycans, its hydrophilic

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18
Q

nucleus pulposus is % water

A

70-90%

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19
Q

at age () the water content decreases

A

50

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20
Q

what age does the sacrum fuse

A

25

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21
Q

older person jumps and hurts

A

facet problem

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22
Q

young person jumps and hurts

A

ivd problem

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23
Q

how many vertebral end plates are there

A

2 one superior and one inferior

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24
Q

cartilaginous plates cover all but the

A

peripheral rim of the ivd

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25
Q

the vertebral end plates attach to

A

the disc and the adjacent vertebral bodies

26
Q

the vertebral end plates is important for

A

nutrition of the IVD

27
Q

the vertebral end plate is very () allowing fluid to enter and exit

A

porous

28
Q

is there vascular supply to the annulus fib and nuc pulp

A

no, avascular necrosis

29
Q

how do ivds get blood

A

from arteries coming into vert bodies, blood gets shoved in IMBIBITION

30
Q

what swell up when you have motion

A

proteoglycans

31
Q

what decreases with age

A

imbibition

32
Q

what part of annulus fibrosus gets sensory and vasomotor innervation

A

peripheral outer one third (so technically the 4 if you have 12)

33
Q

why don’t realize have disc problem

A

cause u cant feel it unitl it gets out to the lat 1/3

34
Q

what nerve innervates the posterior aspect of the annulus fibrosus

A

recurrent meningeal nerve

35
Q

what nerve innervates the posterolateral annulus fibrosus

A

ventral primary rami

36
Q

what innervates the anterior and lateral aspects of the annulus fibrosus

A

branches of gray communicating rami and sympathetic chain

37
Q

whats the nerve supply to the nucleus pulposus

A

non existent

38
Q

what do you see in xray

A

schmorl’s nodes

39
Q

what xray can tell difference between protrusion and excursion

A

mri

40
Q

where get ivd pathologies nad why

A

pll and all not cover posterolateral

41
Q

cuada equine syndrome

A

pushes through but still contained by annulus fibrosus and starts pushing on cord

42
Q

when nuc pulp push out first have () pain and then tweak to avoid () pain and when it hits nerve get () pain

A

scleretogenous, myetogenous, dermatogenous

43
Q

protrusions are still

A

contained

44
Q

lamens terms for hernia

A

slipped disc

45
Q

when nucleus pulposus breaks through and not contained

A

extrusion/prolapse

46
Q

what could happen if fragment break off and goes floating

A

sequestration

47
Q

bulge

A

circumferential concentric phenomenon, could be creep normal

48
Q

protrusion

A

nucleus pulposus has broken through some of the annulus fibrosis, but nucleus is still contained, encapsulated

49
Q

extrusion (prolapse)

A

nucleus pulposus has broken through all the annulas fibrosis. NO LONGER ENCAPSULATED contained

50
Q

sequestration

A

broken fragment of the nucleus dislodged in the canal

51
Q

palliative

A

when you are consciously moving into a position to relieve the pain

52
Q

antalgic

A

not aware that you are not standing properly (lean to left so say antalgic to left)

53
Q

if protrusion is medial to nerve root to and the pain they lean to side of pain

A

relieves the pain

54
Q

if lean opposite to side of pain and protrusion on medial side it would

A

increase the pain

55
Q

if have a disc issue at l4 itll affect () nerve

A

l5

56
Q

if you lean antalgic to the right and hurts on left and pain goes down lateral aspect of leg past knee to digit 4 and 5

A

l5 dermatome, l5 nerve so l4 disc hurt, so its ont LATERAL SIDE OF NERVE

57
Q

if the protrusion is lateral the patient wil

A

lean away

58
Q

most problems with disc usually happen in

A

lumbar

59
Q

what % of annulus fibrosus is proteglycans

A

20%

60
Q

poisson’s ration

A

when a tensile force is applied to a material that material will respond by deforming in length and compressing in width

Maris Spinal anatomy (11 decks)

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