intervertebral disc Nucleus pulposus and annulus fibrosus Flashcards
What is the cervical nucleus pulposus composed of
fibrocartilage
what is the water concentration in the lumbar nucleus pulposus at birth and after 30
birth 88%
thrity 70%
What is the consequence of non-aggregated glycosaminoglycans in the lumbar nucleus pulposus
the nucleus pulposus will loose water under deformation conditions
What cell is associated with the nucleus pulposus until about age 11
notochord cells
what cells are associated with the mature nucleus pulposus
collagen type 2
what general tissue location is described as having an abundance of collagen type 2 fibers
cartilage
what is the role of collage type 2 fibers based on locations where it is dominant
it appears to be related to tissues having a deformation-reformation ability
What is the appearance of the cervical annulus fibrosus
a horse-shoe with the anterior margin thick and the lateral margins tapering to the uncinate processes; the posterior margin is thin
What compensates for the thinness of the posterior part of the cervical annulus fibrosus
posterior longitudinal ligament
what is the organization of the lumbar annulus fibrosus
it has 12-14 concentric cylindrical lamellae
what is the water concentration in the lumbar annulus fibrosus at birth and after 30
birth 78%
thirty 70%
what is the organizational pattern for glycosaminoglycans in the lumbar annulus fibrosus
they typically have a binding site for hyaluronic acid and are thus aggragated
which type of collagen is dominant in the annulus fibrosus
collagen type 1
what is the organizational pattern for collagen fibers in the annulus fibrosus
they are parallel with one another in a single lamellus and angled
what is the organization of collagen fibers between lamellae
collagen fibers will be angled in the opposite direction such that a spiral counterspiral organization is observed
