Listing Subluxation Flashcards
Why do we call ASIN & PIEX married listings?
because they have the same mechanical effects on the spine
Where is the convexity on PLS-M?
Right side
Where is the convexity on PRS-M?
Left side
Where is the convexity on PRI?
Right side
Where is the convexity on PLI-sp
Left side
Name the 5 sacral misalignments:
P-R P-L PI-R PI-L BP
What are the married listings?
ASIN
PIEX
The sacrum misaligns to the ilium at the _____
SI joint
How much rotation of the sacrum is significant when there is no ilium misalignment?
4-6 mm
What do we suspect when the dimensions of the obturators are equal?
No ilium misalignment –> AS, PI, EX, & IN all affect the obturator dimensions
What misalignments can occur at the SI joint?
- AS, PI, IN, & EX
- P-R, P-L, PI-R, PI-L
Name the 3 occcyx lisitngs:
A, A-R, A-L
What condition causes the sacrum to appear to move posterior?
spondylo of L5
List the 8 characteristics of EX ilium:
- Narrower Innominate
- Wider horizontal obturator forament
- HYPERlordosis of lumbars
- Lowers femur head
- Posterior SI Joint open (edema)
- Internal foot rotation (“toe-in”)
- Gluteal fold narrower and peaked
- Wear on medial heel and lateral sole
List 8 characteristics of IN ilium:
- Wider Innominate
- Narrower horizontal obturator forament
- HYPOlordosis of lumbars
- Raises femur head
- Anterior SI joint open (edema)
- External foot roation (“toe-out”)
- Wide & flat gluteal fold
- Wear on lateral heel and medial sole
List 8 characteristics of PI ilium:
- Longer Innominate
- Larger vertical obturator forament
- HYPERlordosis of lumbars
- Spongy edema at posterior/superior SI joint
- Sacrum anterior on involved side
- Leg will be shorter
- Gluteal fold will be lower
- Lower Femur Head
List 8 Characteristics of AS ilium:
- Shorter innominate
- Shorter vertical obturator forament
- HYPOlordosis of lumbars
- SPongy edema at posterior/inferior SI Joint
- Sacrum posterior on the involved side
- Leg will be longer
- Gluteal fold will be higher
- Higher Femur Head
WHat happens to a child with an AS occiput?
- they might walk on their toes or bang their head into the wall in effect to decrease the pressure that is caused by the AS occiput
- These children also have a flathead due to the banging of their head
How do you list IN-EX or EX-IN listings?
- always list the left ilia first, then right
- no A/P misalignment
- no lumbar rotation
What happens to the sacrum & lumbar spine when the ilium misaligns AS?
- because the edema is located in posterior/inferior aspect of the joint,
- the ilium has a weight-bearing shift anteriorly
- this causes the sacrum to compensate by rocking posterior
- which then causes the lumbars to compensate and results in HYPOlordosis
What happens to sacrum & lumbar spine when the ilium misaligns PI?
- Because the edema is in the posterior/superior aspect of the joint,
- the ilium has a weight-bearing shift posteriorward
- this causes the sacrum to compensate by rocking anterior
- which then causes the lumbars to compensate and results in HYPERlordosis
What does the misalignment of the ilia cause?
weight-bearing change which is compensated for by the sacrum & lumbar spine
What region is most commonly associated with cord pressure?
Upper cervical
What level is most commonly associated in cord pressure?
Atlas
Who is susceptible to posterior sacral base?
Pre-adolescents who articular processes haven’t completely ossified
How do you best determine subluxation or compensation of an ilium on the AP film?
- subluxation is most commonly found on the side of the lowest lumbar body rotation
- Usually L5
