Flashcards in Intervertebral Disc: Introduction Deck (13)
What is the classification of the intervertebral disc?
cartilaginous (amphiarthrosis) symphysis
In the fetus, which vertebral levels will demonstrate intervertebral discs?
those between C2 and Co1 inclusive
What is the number of true intervertebral discs identified in the adult?
In the adult, which vertebral levels will demonstrate a true intervertebral disc?
those between C2 and S1 inclusive
What percent of the vertebral column length is contributed by the intervertebral disc?
What is the length of the intervertebral disc contribution to the vertebral column length?
about 7 inches
What is the percent of intervertebral disc height contribution to the length of each region of the vertebral column?
- cervical: 22-25%
- thoracic: 20%
- lumbar: 33%
What is the intervertebral disc histologically composed of?
- collagen fibers
- hydrated proteoglycan gel
What are the names of the central, peripheral, and horizontal zones of the intervertebral disc?
- nucleus pulposus (central zone)
- annulus fibrosus (peripheral zone)
- cartilaginous end plate (horizontal zone)
What is the name of the growth zone of the intervertebral disc?
What maintains the height of the cervical intervertebral disc?
the uncinate process
What is the effect of aging on the intervertebral disc nucleus pulposus?
it becomes more fibrous as water and proteoglycan concentrations diminish