Intervertebral Disc: Function, Classification & Embryology

Question 1

how does the intervertebral disc attach to the vertebral body

Answer 1

sharpey’s fibers from the outer lamella of the annulus fibrosis are firmly embedded into the epiphyseal rims of the adjacent vertebral bodies

Question 2

popular theory of intra-abdominal cavity pressure and intervertebral disc response to weight bearing

Answer 2

increasing the intra-abdominal cavity pressure will diminish the amount of resistance the intervertebral disc needs to generate by up to 50%

Question 3

based on histology, what is the classification of the intervertebral disc

Answer 3

cartilaginous (amphiarthrosis) symphysis

Question 4

division of the embryonic somite

Answer 4

sclerotome, myotome, dermatome

Question 5

structure that is formed following migration of sclerotomes to surround the notochord

Answer 5

perichordal blastema

Question 6

formed within the perichordal blastema between the sclerotomites

Answer 6

intrasclerotomal fissure or fissure of von Ebner

Question 7

what does intrasclerotomal fissure or fissure of von Ebner become

Answer 7

perichordal disc

Question 8

what will the dense sclerotomite become

Answer 8

upper part of the vertebral segment forming below

Question 9

structure that forms following migration and subsequent mixing of the sclerotomites

Answer 9

vertebral blastema

Question 10

part of the intervertebral disc that will form the notochord

Answer 10

nucleus pulposus

Question 11

part of the intervertebral disc that the perichordal disc will form

Answer 11

annulus fibrosus

Question 12

the earliest indicator of the position of the adult intervertebral disc

Answer 12

intrasclerotomal fissure or fissure of von Ebner