Ch9 Lumbar + Sacrum/ Coccyx Flashcards
learn for exam
Exam:
Where is the subarachnoid space?
L3-L4
Exam:
LPO best demonstrates _____ Z joints.
Upside or downside?
left zygapophyseal joints
downside
Exam:
RPO best demonstrates _____ Z joints.
Upside or downside?
right zygapophyseal joints
downside
Exam:
The ear of the scotty dog is?
superior articular process
Exam:
The eye of the scotty dog is?
Pedicle
Exam:
The nose of the scotty dog is?
Transverse process
Exam:
The feet of the scotty dog is?
inferior articular process
Exam:
The neck of the scotty dog is?
Pars interarticularis
Exam:
The body of the scotty dog is?
Lamina
Exam:
The tail of the scotty dog is the?
Spinous process
Exam:
What is an intrathecal procedure?
Administering drugs through the spinal canal
(Ex: MP with chemo)
(intrathecal= spinal space)
Exam:
What is the CR for Sacrum and coccyx?
What is the angle?
midway between pubis symphysis and ASIS or 2 inches inferior to ASIS
or 2 inches superior to pubis symphysis
(all mean the same thing)
15 cephalic for sacrum
10 caudad for coccyx
Exam:
What do you see in a Myleogram?
1. posterior disk herniation
2. posttraumatic spinal cord swelling
3. internal disk legions
1 & 2
We can’t see the internal disk legions because the contrast goes up and down the spinal cord.
We can’t see because the “gusher” in the disc space.
Exam:
What is the angle for a AP sacrum and coccyx?
PA?
15 cephalic for sacrum
10 caudad for coccyx
PA: 15 caudad for sacrum & 10 cephalic for coccyx
Exam:
When are Zygapophyseal joints seen for cervical?
Lateral
90 degrees *
Exam:
What is the angle for a PA sacrum and coccyx?
15 caudad for sacrum
10 cephalic for coccyx
(AP to PA changes angle)
Exam:
When are the Zygapophyseal joints seen for thoracic?
70–75-degree oblique *
Exam:
When performing obliques if the pedicle appears to be too posterior what is the cause?
How do we fix it?
over rotated (too lateral/posterior)
oblique less
Exam:
Which vertebrae are lordotic curves?
What kind of curves are these?
Convex or Concave?
Cervical & lumbar
1st & 2nd compensatory curves
concave
Exam:
Which vertebrae are kyphotic curves?
What kind of curves are these?
Convex or Concave?
Thoracic & Sacrum
1st and 2nd primary curves
Convex
Exam:
What are compensatory curvatures (secondary)?
What are primary curvatures?
Compensatory: Cervical & lumbar
Primary: Thoracic & Sacrum
Exam:
RPO best shows?
right zygapophyseal joints
downside
Exam:
RAO best shows?
left zygapophyseal joints
upside
Exam:
LAO best shows?
right zygapophyseal joints
upside
Exam:
If we are doing a lateral lumbar spine, what plane is perpendicular to the IR?
mid-coronal plane
Exam:
What is in-between the superior (Ear) and inferior (leg) articular process?
Pars interarticularis
Exam:
When are the Zygapophyseal joints shown for lumbar?
45-degree oblique
Exam:
What connects the arch for the spinous process to the transverse process?
Lamina
Exam:
What is the pathology that involves the PARS?
What projection best shows this?
Spondylosis
Oblique lumbar
Exam:
What connects the vertebral body to the transverse process?
pedicle
Exam:
You are performing a 5 view lumbar the patient is complaining of lower back pain from an old sports injury. After the AP projection you roll the patient into a RPO position and make an exposure. The right transverse process projects from the front of the vertebral body and the pedicle is near the anterior aspect of the body in the image. What correction could we do?
More oblique
too AP (anterior) = under rotation
too lateral (posterior)= over rotation
Exam:
What is Spondylosis?
a fx (defect) to the PARS interarticularis
(“Scottie dog wearing a collar”)
Most common at L4-L5
Exam:
What is spondylolisthesis?
Best shown in?
forward slipping of one vertebrae
Originates from spondylosis
Common in L5-S1
“Slipped disc”
best shown in a lateral
Exam:
Why would we have the patient flex their knees or place a sponge during a supine AP lumbar projection?
fix the curvature of the spine
to reduce OID
decrease magnification
Exam:
What view best shows spondylthesis?
lateral
Exam:
When do we see the lumbar foramen?
lateral view
Exam:
LPO best shows?
left zygapophyseal joints
downside
Exam:
What view best shows spondylosis?
Oblique lumbar