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Related Concept Videos

Herniated Intervertebral Disc l: Introduction01:29

Herniated Intervertebral Disc l: Introduction

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Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
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The symptoms of degenerative disc disease arise from a combination of mechanical compression, vascular compromise, and biochemical inflammation, which together disrupt nerve function and produce pain.Mechanical CompressionDisc degeneration reduces height and elasticity, predisposing to herniation of the nucleus pulposus, a major cause of radicular pain. Herniations may be protrusion (bulging with intact annulus), extrusion (nucleus extends beyond disc but remains connected), or sequestration...
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Degenerative disc disease is a chronic condition in which intervertebral discs gradually lose structure and function. It is not infectious or autoimmune; rather, it results from age-related biochemical and mechanical changes, influenced by genetic, metabolic, and environmental factors.Structure and Function of DiscsThe spine contains 23 intervertebral discs that absorb load, distribute forces, maintain spacing, and allow flexibility. Each disc consists of a nucleus pulposus, a gel-like core...
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A typical vertebra, with the exception of the sacrum and coccyx, consists of a body, a vertebral arch, and seven different projections termed processes. The anterior portion of the vertebrae, the body, supports about half the body’s weight. The vertebral bodies progressively increase in size and thickness from the cervical region to the lumbar region of the vertebral column. The intervertebral discs present between the bodies of adjacent vertebrae firmly unites them, forming a continuous...
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The vertebral column or spine is a flexible column that supports the head, neck, and body and  allows for their movements. It also protects the spinal cord.
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The spinal cord resides within the protective confines of the vertebral column. It is the main pathway for information traveling between the brain and the body. It plays a fundamental role in nearly all bodily functions, from simple reflexes to complex motor movements. The spinal cord begins at the medulla oblongata at the base of the brainstem and extends downward, terminating at the conus medullaris near the first and second lumbar vertebrae. The spinal cord's length in adults is...
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Multilevel Oblique Lumbar Interbody Fusion in Degenerative Lumbar Disc Disease with Instability
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Spinous process deviation and disc degeneration in lumbosacral segment.

Shujie Tang1, Hongjie Liu1, Yingjie Zhang2

  • 1Department of Traditional Chinese Medicine, Medical School, Jinan University, Guangzhou, China.

The Journal of Surgical Research
|December 4, 2014
PubMed
Summary

Spinous process deviation in the lumbar spine does not appear to be linked to intervertebral disc degeneration. This study found no correlation between spinous process variations and disc health in the lumbosacral region.

Keywords:
Deviation angleDisc degenerationSpinous process deviationThe modified Pfirrmann grading system

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Area of Science:

  • Orthopedics
  • Radiology
  • Spine Surgery

Background:

  • Spinous process deviation is a common lumbar spine variation.
  • Potential muscle imbalance associated with spinous process deviation is suggested.
  • No prior studies investigated the link between spinous process deviation and lumbosacral disc degeneration.

Purpose of the Study:

  • To investigate the potential correlation between spinous process deviation and disc degeneration in the lumbosacral spine.
  • To determine if variations in spinous process alignment are associated with degenerative changes in lumbar intervertebral discs.

Main Methods:

  • Retrospective review of 465 outpatients with lumbar degenerative diseases.
  • Patients categorized into L4 deviation, L5 deviation, and no deviation groups.
  • Spinous process deviation angle measured via CT (Image J); disc degeneration graded using MRI (Modified Pfirrmann Grading System).

Main Results:

  • 118 cases included: 69 no deviation, 30 L4 deviation, 19 L5 deviation.
  • No significant difference in disc degeneration grade between no deviation and L4/L5 deviation groups (P > 0.05).
  • No significant correlation found between deviation angle and disc degeneration grade in L4/L5 deviation groups (P > 0.05).

Conclusions:

  • Lumbar spinous process deviation is not correlated with intervertebral disc degeneration.
  • Findings suggest spinous process variations do not influence degenerative disc disease in the lumbosacral segments.