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What is the most common direction the nucleus pulposus will move if an intervertebral disc herniates?

What is the most common direction the nucleus pulposus will move if an intervertebral disc herniates?
Science   Anatomy-And-Physiology   
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Answer #1

The most common direction in which the nucleus pulposus herniates is posterolateral.

  1. The intervertebral disc is fibrocartilage.
  2. It acts as a cushion between the bodies of the vertebrae( superior and inferior )
  3. The intervertebral disc consists of two parts:
    1. Annulus fibrous - this part of the intervertebral disc consist of dense cartilaginous fibrous rings
    2. Nucleus pulposus - This forms the center of the intervertebral disc. This part is jelly-like
  4. The intervertebral disc is supported anteriorly and posteriorly by an anterior and posterior longitudinal ligament.
  5. The annulus fibrosus is thinner posterolaterally.
  6. Therefore, nucleus pulposus herniates ( commonly ) posterolaterally.
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