Table of Contents

Pars defect (spondylolysis, pars fracture)

A pars defect, also known as spondylolysis, is a stress fracture in a small part of the bone in the lower spine called the pars interarticularis. The pars interarticularis connects the facet joints of the spine.

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Pars defect spine

This condition is most common in adolescents and young adults who participate in sports that involve repetitive hyperextension of the spine, such as gymnastics, dancing, football, and weightlifting.

Symptoms of a pars defect can include:

• Low back pain that worsens with activity and improves with rest
• Pain that is aggravated by hyperextension of the lower back
• Muscle tightness or spasms in the lower back

In some cases, there may be no symptoms at all.

Slipped disc (herniated disc)

A slipped disc, also known as a herniated disc, occurs when a soft inner portion of a spinal disc protrudes through a tear in the tougher, outer ring. The spinal discs are like cushions that sit between the bones (vertebrae) in your spine. They act as shock absorbers and help your spine move.

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Causes of a slipped disc

There are a few different things that can cause a slipped disc, including:

• Aging: Discs naturally degenerate as you age, making them less flexible and more prone to tears.