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Herniated Intervertebral Disc l: Introduction

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...

Degenerative Disc Disease ll: Pathophysiology

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...

Degenerative Disc Disease I: Introduction

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...

Spinal Cord Injury ll: Pathophysiology

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...

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Related Experiment Video

Updated: Jun 14, 2026

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

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

Published on: April 7, 2023

Inciting events associated with lumbar disc herniation.

Pradeep Suri¹, David J Hunter, Cristin Jouve

¹Division of Research, New England Baptist Hospital, Boston, MA 02120, USA. psuri@caregroup.harvard.edu

The Spine Journal : Official Journal of the North American Spine Society

|March 30, 2010

Summary

Most lumbar disc herniations (LDH) occur without a clear inciting event. Identifying specific triggers for LDH is not significantly associated with symptom severity, offering insights for patient recovery.

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Published on: October 14, 2022

Area of Science:

Orthopedics
Neurosurgery
Physical Medicine and Rehabilitation

Background:

Lumbar disc herniation (LDH) is a common condition, yet the frequency and clinical significance of patient-identified inciting events remain understudied.
Understanding the role of specific events in LDH onset is crucial for patient management and recovery.

Purpose of the Study:

To determine the clinical frequency of patient-identified inciting events in lumbar disc herniation (LDH).
To investigate associations between the presence of inciting events and the severity of clinical presentation in LDH patients.

Main Methods:

A cross-sectional analysis was conducted using data from a prospective cohort study with retrospective collection of inciting event data.
One hundred fifty-four adults with MRI-confirmed LDH and lumbosacral radicular pain were included.
Outcomes included disability (Oswestry Disability Index) and pain (visual analog scales) assessed via self-report measures.

Main Results:

A significant majority (62%) of lumbar disc herniation (LDH) cases lacked a specific patient-identified inciting event.
Non-lifting physical activities were the most frequent inciting event (26%), while heavy lifting, light lifting, nonexertional occurrences, and physical trauma comprised smaller proportions.
No significant association was found between the presence of any inciting event, or specifically lifting-related events, and more severe clinical presentations (disability or pain).

Conclusions:

The majority of lumbar disc herniation (LDH) cases do not have a clearly identifiable inciting event.
A history of an inciting event, including lifting-related activities, is not significantly associated with increased clinical severity in LDH.
Findings can aid in counseling patients during recovery from acute lumbar disc herniation (LDH).