Intervertebral discs

Definition

Intervertebral discs are fibrocartilaginous cushions situated between the vertebrae of the spine. They provide flexibility and absorb shock to maintain spinal integrity during movement.

5 Must Know Facts For Your Next Test

1. Intervertebral discs consist of two main parts: the nucleus pulposus and the annulus fibrosus.
2. They allow for slight movement of the vertebrae, contributing to the spine's range of motion.
3. Intervertebral discs act as shock absorbers, distributing pressure evenly across the spine.
4. Degeneration or injury of these discs can lead to conditions such as herniated discs or degenerative disc disease.
5. The height of intervertebral discs decreases with age, contributing to a decrease in overall height.

Review Questions

• What are the two main components of an intervertebral disc?
• How do intervertebral discs contribute to spinal movement and flexibility?
• What potential health issues can arise from damaged or degenerated intervertebral discs?

Related terms

Nucleus Pulposus: The inner gel-like core of an intervertebral disc that provides cushioning and flexibility.

Annulus Fibrosus: The tough outer layer of an intervertebral disc that encases and protects the nucleus pulposus.

Herniated Disc: A condition where the nucleus pulposus protrudes through a tear in the annulus fibrosus, potentially causing pain and nerve compression.