vertebral column Flashcards
intervertebral joints: describe the anatomy of the intervertebral joints, explain the role of intervertebral discs in weight-bearing and give examples of common disc pathology
typical vertebrae: why does vertebral arch have sites of articulation
contains superior and inferior articular processes for connection toadjacent veterbrae (difficult to turn sideways as vertical)
what are intercolated discs made from, and 2 sections
waterfilled structures with some cartilage collagen rings (annulus fibrosus) around a nucleus (nucleus pulposus)
2 functions of intercolated discs
help transmit forces, help with allowing flexibility between vertebrae
how is verebral column length increased with regard to intercolated discs
hydration and stretching
why do intercolated discs get narrower over time
overtime lose water
effect of degenarative disc diseases on spinal nerves
if gaps between adjacent vertebrae get smaller, can impinge on spinal nerves exiting intervertebral foramen
effect of posterior defect in anulus fibrosus
contents of nucleolus pulposus herniate through gap in anulus fibrosus and emerge into vertebral foramen and impinge on spinal cord or nerves below that spinal level, causing pain
effect of lateral defect in anulus fibrosus
contents of nucleolus pulposus herniate through gap in anulus fibrosus and emerge into intervertebral foramen and impinge on spinal nerve at that level, causing pain
what is sciatica
prolapsed inflamed intervertebral disc causing pain
why is sciatica more painful at lower lumbar regions
more weight bearing and forces
