Intervertebral Disc: Classification and Embryology Flashcards Preview

Spinal Anatomy I - Exam 3 > Intervertebral Disc: Classification and Embryology > Flashcards

Flashcards in Intervertebral Disc: Classification and Embryology Deck (18):
1

Based on histology, what is the classification of the intervertebral disc?

cartilaginous (amphiarthrosis) symphysis

2

Based on function, what is a possible classification for the intervertebral disc?

a synovial (diarthrosis) arthrodia

3

How do the parts of the intervertebral disc reflect the parts of a synovial (diarthrosis) joint?

- the annulus fibrosus is comparable to the fibrous capsule
- the nucleus pulposus is comparable to the synovial fluid
- the cartilage end plate is comparable to the articular cartilage

4

What is the earliest indicator of intervertebral disc pathology or degeneration?

changes in the histology of the cartilage end plate

5

What are the divisions of the embryonic somite?

- sclerotome
- myotome
- dermatome

6

What part of the somite will form the vertebral column?

sclerotome

7

What structure is formed following migration of sclerotomes to surround the notochord?

the perichordal blastema

8

What is formed following differential mitosis within the perichordal blastema?

- a loose cranial sclerotomite
- a dense caudal sclerotomite

9

What is formed within the perichordal blastema between the sclerotomites?

the intrasclerotomal fissure or fissure of von Ebner

10

What does the intrasclerotomal fissure become?

the perichordal disc

11

What will the dense sclerotomite become?

the upper part of the vertebral segment forming below

12

What will the loose sclerotomite become?

the lower part of the vertebral segment forming above

13

What structure forms following migration and subsequent mixing of the sclerotomites?

the vertebral blastema

14

What forms the upper part of the vertebral blastema?

the dense caudal sclerotomite of the perichordal blastema above

15

What forms the lower part of the vertebral blastema?

the loose cranial sclerotomite of the perichordal blastema below

16

What part of the intervertebral disc will the notochord form?

the nucleus pulposus

17

What part of the intervertebral disc will the perichordal disc form?

the annulus fibrosus

18

What is the earliest indicator of the position of the adult intervertebral disc?

the intrasclerotomal fissure or fissure of von Ebner

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