Spinal Discs

By Ehren Allen, Certified Manual Therapist/Physical Therapist

Spinal discs make up the back but are open to injury including herniation.

Anatomy of the Spine.

Spinal Discs: Overview

There are 23 vertibral discs that make up the spine, they are unique structures and have 3 main functions:

  • Shock Absorber: Discs are positioned between each bony vertebra, cushioning the spine as you move.
  • Structure:  Discs are also tough ligaments that hold the spine together.
  • Mobility/Flexibility: They are cartilaginous joints that allow for mobility in the spine.

If you would like to learn more about Degenerated L4 and 5 spinal discs, click here:


Injuries of spinal discs are complicated because the disc can sometimes press on a nearby nerve, causing pain in a different part of the body.

Herniated Disc

Sometimes, a tear in the annular ligament of the disc allows the nucleus pulposus to squeeze your spinal canal, which is what is known as a herniated disc. If the disc compresses your nerve root, you may suffer pain, numbness, and weakness in the area supplied by the nerve. In most cases, surgery is required to remove a herniated disc in order to relieve pressure on the nerve roots. This procedure is called a diskectomy. Here are the top 5 tips for herniated disc pain relief.

Degenerative Disc Disease

Also known as DDD, this is when the intervertebral discs lose height and size, causing the vertebrae to sit closer together and have less stability. These changes may be accompanied by other arthritic changes and cause inflammation or encroachment on nerve structures.

JOI Rehab

Whether you are suffering from back issues, joint pain, or injuries resulting from any type of activity, JOI has physical therapy clinics conveniently located in Jacksonville and Northeast FL who specialize in orthopedic rehab.

If you are interested in scheduling an appointment at JOI Rehab for physical therapy, call (904) 858-7045. If you need to see an orthopedic spine specialist, please click the banner below.


All JOI Physicians, Physical Therapists and Occupational Therapists now offer Telemedicine services for virtual visits from the convenience of your home.

JOI Fracture and Injury Care Services

By: Ehren Allen, Certified Manual Therapist/Physical Therapist

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