Lumbar Vertebrae (Quiz 2/Test 2) Flashcards

1
Q

Lumbar vertebrae have massive _________ SPs

A

leveled

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2
Q

What are the typical lumbar vertebrae?

A

L1-L4

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3
Q

What are the largest vertebral bodies in the spine?

A

lumbar body is the largest

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4
Q

What shape are lumbar body’s?

A

kidney shaped cylinders with concave sides (wider than they are long)
-become wider, shorter and more concave sides from L1->L5
-epiphysis wedged open anteriorly at L4/L5

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5
Q

What are the features of pedicles on lumbar vertebrae?

A

-short, thick horizontal cylinders of bone
-shallow superior pedicle notch
-deeper inferior pedicle notch
-formed peanut shaped IVFs***** test q

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6
Q

Where do the pedicles of lumbar vertebrae project?

A

directly posteriorly from the posterolateral corners of the body

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7
Q

What is the figure 8 sign?

test q

A

narrowing of IVF suggests lumbar posteriority (this is a problem and usually a subluxation if not worse)

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8
Q

What are the features of TPs on lumbar vertebrae?

A

-flat, thin blades that are susceptible to fractures
-L1 is the shortest TP in the lumbar spine
-L3 TP is the longest in the lumbar spine
-costogenic tissue (actually lumbar ribs)

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9
Q

Which lumbar TP is the shortest?

A

L1 TP

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10
Q

Which lumbar TP is the longest?

A

L3 TP

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11
Q

Where do the TPs of lumbar vertebrae project?

A

laterally, slightly posterosuperiorly from the pedicles

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12
Q

What are the features of the accessory processes of lumbar vertebrae?

A

-small pointed bump (may be indistinct)
-costogenic tissue

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13
Q

Where do the accessory processes of lumber vertebrae project?

A

from the posterior base of the tp

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14
Q

What are the accessory processes of lumbar vertebrae homologous to?

A

T12 inferior tubercle

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15
Q

What are the features of the pre-zygopophyses of lumbar vertebrae?

A

-massive, strong, rounded process
-set more widely apart from the post-zygopophyses

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16
Q

Where do the pre-zygopophyses of lumbar vertebrae project?

A

posterosuperiorly from the pedicle

17
Q

What are the features of superior articular surfaces of lumbar vertebrae?

A

-cover the entire medial aspect
-round, oval, irregular shape
-large, smooth clearly marginated
-flat vertically and concave AP

18
Q

What direction do the superior articular surfaces of lumbar vertebrae face?

A

posteromedially (most medially at L3)

19
Q

What are the features of mammillary processes of lumbar vertebrae? Where is it located?

A

-distinct rounded bump
-located on the posterior margin of the pre-zygopophyses
-true transverse of lumbar vertebrae
-adjusting contact point (NOT TP bc its very delicate in lumbars)
-palpate just superolaterally to their own spinous

20
Q

What are the mammillary processes homologous to?

A

T12 superior tubercle of TP

21
Q

What is the pars interarticularis/vertebral isthmus?

A

-bridge of bone between the pre and post zygopophyses
-separate distinct feature in lumbar vertebrae
-narrowest area and focus of stress in the vertebral arch

22
Q

What part of the spine is more susceptible to herniated discs?

A

lumbar

strengthen core and it will help

L5 is usually where is starts bc its holding all your weight

23
Q

What is spondylolysis/spondylolisthesis?

A

-a lumbar vertebrae anomaly
-its a congenital mal-ossification or fracture
-causes forward slippage of body
-can be caused by anterolisthesis
-most commonly happens at L5
-scotty dog’s collar is seen on lumbar oblique x-rays (contralaterally)

note: there are broken grades on a scale of 0-5 that depends on how far it moves from the sacrum or vertebra below (5 being it completely fell off below vertebra or sacrum)

24
Q

What are the features of post-zygopophyses of lumbar vertebrae?

A

-strong prominent processes set closely together
-project inferiorly from the interarticularis

25
What are the features of the inferior articular surfaces of lumbar vertebrae?
-covers the entire post-zygopophysis anterolaterally -tall ovals that are flat SI and convex AP -face anterolaterally (most directly lateral at L3) -interlock with the superior articular surfaces below does not allow rotation
26
Where do the laminae of the lumbar vertebrae project?
posteromedially from the post-zygopophyses
27
What are the characteristics of laminae in the lumbar vertebrae?
-broad, thick, and strong -notched top and bottom -forms the posterior walls of the neural canal
28
What are the features of SPs of lumbar vertebrae?
-large, long, rectangular, stocky -level with vertebral body -large fusiform "distal spinous tubercle"
29
Where do the SPs of lumbar vertebrae project?
nearly horizontally
30
What makes L5 atypical?
-mostly typical- looks like a squished lumbar -vertebral body is wide, short, and very concave on the sides -most wedged epiphyses (open to anterior) -may show lipping/spurring (pathology) -more susceptible to osteoarthritis bc it holds a lot of weight -SP is shorter and rounded -SP is angled postero-inferior -SP is harder to palpate than other lumbar SPs -has shortened/thickened TPs and pedicles