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Related Concept Videos

Degenerative Disc Disease I: Introduction01:27

Degenerative Disc Disease I: Introduction

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...
Degenerative Disc Disease ll: Pathophysiology01:23

Degenerative Disc Disease ll: Pathophysiology

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...
Herniated Intervertebral Disc l: Introduction01:29

Herniated Intervertebral Disc l: Introduction

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...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

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Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

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Related Experiment Video

Updated: May 9, 2026

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation
05:42

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation

Published on: April 7, 2023

Does hard work prevent disc protrusion?

R W Porter1

  • 1Doncaster Royal Infirmary, Doncaster, UK.

Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
PubMed
Summary
This summary is machine-generated.

Coal miners show higher hospital attendance for back pain than expected. Heavy manual work may strengthen spines, potentially reducing disc protrusion issues in miners.

Related Experiment Videos

Last Updated: May 9, 2026

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation
05:42

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation

Published on: April 7, 2023

Area of Science:

  • Occupational Health
  • Orthopedics
  • Epidemiology

Background:

  • Back pain is a common health issue, particularly among manual laborers.
  • Understanding occupational risks for specific back pain syndromes is crucial for prevention and treatment.

Purpose of the Study:

  • To compare the prevalence of specific back pain syndromes in coal miners versus non-miners.
  • To investigate the relationship between heavy manual labor and spinal health outcomes.

Main Methods:

  • Retrospective analysis of hospital attendances for back pain.
  • Comparison of prevalence rates between coal miners and a non-miner control group.
  • Categorization of back pain syndromes based on clinical criteria.

Main Results:

  • Coal miners represented a higher proportion of hospital attendances for back pain than expected (2.78% vs. 1.99%).
  • Miners showed a higher prevalence of back pain syndromes associated with degenerative changes.
  • Fewer miners required disc excision, while more underwent decompressive surgery compared to non-miners.

Conclusions:

  • Heavy manual labor, such as coal mining, may contribute to spinal strengthening.
  • This strengthening might offer some protection against disc protrusion, as suggested by surgical intervention differences.