Intervertebral Disc: Introduction

Question 1

What is the number of true intervertebral discs identified in the adult?

Answer 1

23

Question 2

In the adult, which vertebral levels will demonstrate a true intervertebral disc?

Answer 2

Those between C2 and S1 inclusive

Question 3

What is the percent of intervertebral disc height contribution to the length of each region of the vertebral column?

Answer 3

Cervical: 22-25%
Thoracic: 20%
Lumbar: 33%

Question 4

What are the names of the central, peripheral, and horizontal zones of the intervertebral disc?

Answer 4

Nucleus Pulposus: Central Zone
Annulus Fibrousis: Peripheral Zone
Cartilaginous End Plate: Horizontal Zone