Clinical medicineLesson 5 of 5 in the course Low back pain and spinal disorders

Intervertebral Disc Herniation: Mechanisms, Symptoms, Diagnosis, and Management

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

This lesson introduces the structure of an intervertebral disc and explains what happens when a disc herniates. Understanding the anatomy helps distinguish a herniation from related conditions and clarifies why the term “slipped disc” is misleading.

A disc is firmly attached between neighboring vertebrae. It can deform, tear, bulge, or herniate, but it does not literally slip out of place.

All flashcards

What is the annulus fibrosus?
The annulus fibrosus is the tough, fibrous outer ring of an intervertebral disc. A tear in it can allow central disc material to bulge or extend outward.
What is the nucleus pulposus?
It is the soft, gel-like central portion of an intervertebral disc. When it passes through a tear in the annulus, the disc is herniated.
What distinguishes a protrusion from a herniation?
A protrusion is a bulge in which the outermost annular layers remain intact and central material does not escape beyond them. A herniation involves material extending through a defect in the outer ring.
Why is “slipped disc” an inaccurate term?
Intervertebral discs are attached between adjacent vertebrae and do not literally slip out of place. They can bulge, tear, herniate, or degenerate.
How can inflammation cause disc-related pain?
A disc tear may release inflammatory mediators that irritate tissues and produce pain, sometimes even without obvious nerve-root compression.

Quiz questions

  1. Which spinal levels are the most common sites of lumbar disc herniation?Answer: L4–L5 and L5–S1
  2. Which imaging method is preferred for confirming a suspected lumbar disc herniation because it shows soft tissues and nerves well?Answer: Magnetic resonance imaging (MRI)
  3. Which presentation can indicate cauda equina syndrome and requires urgent medical assessment?Answer: New bowel or bladder control loss with genital numbness or worsening weakness
  4. For many uncomplicated spinal disc herniations, which general approach is usually tried initially?Answer: Conservative care, such as activity guidance and physical therapy
  5. What does a discectomy do when used to treat a symptomatic disc herniation?Answer: Removes part of the disc responsible for symptoms

Based on the Wikipedia article Disc herniation, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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