Lumbar, Sacrum, Coccyx Anatomy Flashcards
(31 cards)
What are the characteristics of lumbar vertebrae?
Largest and strongest vertebrae
L5 is the largest lumbar vertebra
Where is the lumbar disk commonly injured?
Common site for injury in lumbar region
What is the orientation of intervertebral foramina?
Situated at 90 degrees to MSP
What forms the intervertebral foramina?
Superior and inferior vertebral notches
What do intervertebral foramina serve as?
Passage for nerves and vessels
What do the articular processes of lumbar zygapophyseal joints project from?
Junction of laminae and pedicles
How many superior and inferior articular processes are there in lumbar zygapophyseal joints?
2 superior and 2 inferior
What is the technical definition of a facet?
Articular surface
At what angle do lumbar zygapophyseal joints form to the MSP?
30-50 degrees
What forms a bridge between transverse processes, lateral masses, and spinous processes?
Laminae
What is the pars interarticularis?
Laminae between the superior and inferior articular processes
What is the conus medullaris?
Tapered end of the spinal cord
At which vertebral levels does the spinal cord terminate?
L1-L2
What is the cauda equina?
Nerve root bundles continuing past the termination of the spinal cord
What is the shape of the sacrum?
Shovel-shaped
What is the difference in sacrum size between females and males?
Female sacrum is shorter and wider than male sacrum
What is the promontory in the sacrum?
Anterior ridge on the 1st sacral segment
What does the sacral canal continue from?
Continuation of the vertebral canal
What forms the median sacral crest?
Fused spinous processes
What is the auricular surface of the sacrum?
Ear-like articulation with ilium
What is the coccyx?
Most distal part of the vertebral column
How many fused segments does the coccyx have?
3-5 fused segments
What does a properly positioned 45° lumbar oblique demonstrate?
The ‘Scottie dog’ appearance
In the ‘Scottie dog’ anatomy, what does the neck represent?
Pars interarticularis
