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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...
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...
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...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...
Embryonic Connective Tissues01:20

Embryonic Connective Tissues

During early development, the embryo forms two types of connective tissues— the mesenchyme and mucoid connective tissue.
The mesenchyme is the first connective tissue that emerges in the developing embryo. It consists of loosely arranged multipotent mesenchymal cells and reticular fibers in the extracellular matrix. This loose arrangement allows easy migration of cells, which is essential for germ layer positioning, patterning, and organ morphogenesis during embryonic development. Mesenchyme is...
Development of Blood Vessels01:07

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...

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Related Experiment Video

Updated: May 17, 2026

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
06:22

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration

Published on: July 8, 2021

Bridging the Gap: Understanding Embryonic Intervertebral Disc Development.

V Sivakamasundari, Thomas Lufkin

    Cell & Developmental Biology
    |October 30, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Intervertebral disc (IVD) development relies on notochord-vertebral body interactions. Further research into IVD formation and degeneration mechanisms is crucial for developing effective therapies for disc degenerative disease (DD).

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    Preparation of Intact Bovine Tail Intervertebral Discs for Organ Culture

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    Last Updated: May 17, 2026

    Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
    06:22

    Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration

    Published on: July 8, 2021

    An In Vitro Organ Culture Model of the Murine Intervertebral Disc
    08:03

    An In Vitro Organ Culture Model of the Murine Intervertebral Disc

    Published on: April 11, 2017

    Preparation of Intact Bovine Tail Intervertebral Discs for Organ Culture
    13:37

    Preparation of Intact Bovine Tail Intervertebral Discs for Organ Culture

    Published on: February 2, 2012

    Area of Science:

    • Biomedical Engineering
    • Developmental Biology
    • Regenerative Medicine

    Background:

    • The intervertebral disc (IVD) is vital for spinal biomechanics, providing flexibility and strength.
    • Disc degenerative disease (DD) is a common condition causing pain and spinal deformities like scoliosis and disc herniation.

    Purpose of the Study:

    • To review known and proposed molecular mechanisms of embryonic IVD development.
    • To identify knowledge gaps in IVD formation and degeneration for future research and therapeutic development.

    Main Methods:

    • Analysis of traditional knock-out and spontaneous mutant mouse models to study IVD development.
    • Review of existing literature on molecular mechanisms and etiology of IVD degeneration.

    Main Results:

    • Notochord and vertebral body interactions are critical for proper IVD formation.
    • Current understanding of molecular mechanisms governing IVD development and degeneration is insufficient.

    Conclusions:

    • Elucidating IVD formation and degeneration mechanisms is essential for effective DD therapies.
    • Next-generation sequencing and genome engineering offer promising avenues for future research in this field.