Intervertebral Disc: Classification & Embryology

Question 1

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

Answer 1

cartilaginous (amphiarthrosis) symphysis

Question 2

what are the divisions of the embryonic somite?

Answer 2

sclerotome, myotome, and dermatome

Question 3

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

Answer 3

perichordal blastema

Question 4

what is formed within the perichordal blastema between the sclerotomites?

Answer 4

the intrasclerotomal fissure or fissure of von Ebner

Question 5

what does the intrasclerotomal fissure or fissure of von Ebner become?

Answer 5

perichordal disc

Question 6

what will the dense sclerotomite become?

Answer 6

the upper part of the vertebral segment forming below

Question 7

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

Answer 7

vertebral blastema

Question 8

what part of the intervertebral disc will the notochord form?

Answer 8

nucleus pulposus

Question 9

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

Answer 9

annulus fibrosus

Question 10

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

Answer 10

intrasclerotomal fissure or fissure of von Ebner