Intervertebral Disc: Nucleus Pulposus/ Annulus Fibrosus Flashcards Preview

Spinal Final > Intervertebral Disc: Nucleus Pulposus/ Annulus Fibrosus > Flashcards

Flashcards in Intervertebral Disc: Nucleus Pulposus/ Annulus Fibrosus Deck (22)
Loading flashcards...
1

composition of nucleus pulposus

fibrocartilage

2

what is the water concentration in the lumbar nucleus pulposus at birth and after 30

birth = 88%
30 = 70%

3

consequence of non-aggregated glycosaminoglycans in the lumbar nucleus pulposus

nucleus pulposus will loose water under deformation conditions

4

cell associated with the nucleus pulpous until age 11

notochord cells

5

cell associated with the mature nucleus pulposus

reticulocyte-fibroblast and chondroblast

6

organizational pattern for collagen fibers in the nucleus pulposus

they are irregularly orientated and randomly scattered

7

general tissue location is described as having an abundance of collagen type II fibers

cartilage

8

role of collagen type II fibers based on locations where it is dominant

it appears to be related to tissues having a deformation - reformation ability

9

type of collagen that is dominant in the nucleus pulposus

collagen type II

10

appearance of the cervical annulus fibrosus

horse-shoe with anterior margin thick and the lateral margins tapering to the uncinate processes; the posterior margin is thin

11

compensates for thinness of the posterior part of the cervical annulus fibrosus

posterior longitudinal ligament

12

organization of the lumbar annulus fibrosus

12-14 concentric cylindrical lamellae

13

why is the posterior part of the lumbar annulus fibrosis more susceptible to rupture, herniation, prolapse, or protrusion

posterior margin of each lamellas is thing and the posterior longitudinal ligament is also less developed

14

what is the water concentration in the lumbar annulus fibrosis at birth and after
30 yo

birth = 78%
+30= 70%

15

organizational pattern for glycosaminoglycans in the lumbar annulus fibrosus

typically have a binding site for hyaluronic acid and are thus aggregated

16

type of collagen that is dominant in the annulus fibrosus

collagen type I

17

organization of collagen fibers in the annulus fibrosus

they are parallel with one another in a single lamellas and angled

18

organization of collagen fibers between lamellae

collagen fibers will be angled in the opposite direction such that a spiral- counter spiral organization is observed

19

average angle of collagen fibers within the annulus fibrosus

average 50-60*

20

the attachment site for collagen fibers within the annulus fibrosus

collagen fibers of the OUTER lamellae will become SHARPEYs fibers and penetrate EPIPHYSEAL RIMS

collagen fibers of the INNER lamellae will attach to the CARTILAGINOUS ENDPLATE

21

origin for cells of the annulus fibrosus

sclerotomites

22

cell type associated with the annulus fibrosus

fibroblast and fibrocyte