They vary in shape, size, and thickness, in different parts of the vertebral column, the thickness decreasing through the thoracic and lumbar regionlumbar region The loins, or lumbus, are the sides between the lower ribs and pelvis, and the lower part of the back. The term is used to describe the anatomy of humans and quadrupeds, such as horses, pigs, or cattle. › wiki › Loin

Loin - Wikipedia

. Each intervertebral disc consist of two parts: ... It is soft but non compressible, so susceptible to herniate inside the vertebral canal.

What are the characteristics of intervertebral discs?

Intervertebral discs are composed of an annulus fibrosus and a nucleus pulposus. Photo Courtesy of: SpineUniverse.com. The annulus fibrosus is a strong radial tire–like structure made up of lamellae; concentric sheets of collagen fibers connected to the vertebral end plates. The sheets are orientated at various angles.

What are intervertebral disks?

The intervertebral discs provide cushioning between vertebrae and absorb pressure put on the spine. While the discs in the lower (lumbar ) region of the spine are most often affected in intervertebral disc disease, any part of the spine can have disc degeneration.

Are intervertebral discs made of?

The intervertebral discs are complex structures that consist of a thick outer ring of fibrous cartilage termed the annulus fibrosus, which surrounds a more gelatinous core known as the nucleus pulposus; the nucleus pulposus is sandwiched inferiorly and superiorly by cartilage end-plates.

What is an intervertebral disk made of?

The intervertebral disc is made up of two components: the annulus fibrosus and thenucleus pulposus. The annulus fibrosus is the outer portion of the disc. It is composed of layers of collagen and proteins, called lamellae.

Intervertebral disc (anatomy)

39 related questions found

What are the intervertebral discs made of quizlet?

Intervertebral disks are made up of a series of tough outer rings called Annulus Fibrosus and a soft gelatinous inner Nucleus Puplosus.

What are intervertebral disc made of and what is their function?

The discs have a tough outer covering of cartilage that provides support (the annulus fibrosus) and a soft, jellylike center that provides the cushioning (the nucleus pulposus). The intervertebral discs have the following functions: They provide cushioning for the vertebrae and reduce the stress caused by impact.

What are discs made?

Each disc is made up of a tough, fibrous outer layer (annulus fibrosis) and a jelly-like inner layer (nucleus pulposus). The tough outer layer contains and protects the softer inside layer. These small discs have a big job. They enable your spine to move in all directions.

Is intervertebral discs made of fibrocartilage?

The intervertebral disc (IVD) is important in the normal functioning of the spine. It is a cushion of fibrocartilage and the principal joint between two vertebrae in the spinal column.

What are artificial spinal discs made of?

While there are several different types of artificial discs, most are made of a metal (such as titanium or cobalt chromium) outer shell with an inside made of medical grade plastics. However, all artificial discs share the same purpose: to replace damaged discs while retaining movement and flexibility.

Where is the intervertebral disc?

An intervertebral disc (or intervertebral fibrocartilage) lies between adjacent vertebrae in the vertebral column. Each disc forms a fibrocartilaginous joint (a symphysis), to allow slight movement of the vertebrae, to act as a ligament to hold the vertebrae together, and to function as a shock absorber for the spine.

What causes intervertebral disc degeneration?

Underlying causes of disc degeneration include genetic inheritance, age, inadequate metabolite transport, and loading history, all of which can weaken discs to such an extent that structural failure occurs during the activities of daily living.

What is the major cell type of an intervertebral disc?

Intervertebral disc cells

Two cell types normally populate the adult intervertebral discs: rounded chondrocyte-like cells of the nucleus pulposus and inner annulus fibrosus regions, and the flattened fibroblasts-like cells of the outer annulus fibrosus [30].

How are spinal discs numbered?

The bone numbering starts at the top, near the skull, with C1 and then each bone going down is given a higher number with the last bone in the neck called C7. Between those bones are discs, each given two numbers that coorespond to the bone above and below the disc. The disc located between C4 and C5 is called C4-C5.

What type of cartilage makes up the intervertebral discs?

Fibrous cartilage has many collagen fibers and is found in the intervertebral discs and pubic symphysis.

What type of fiber makes up fibrocartilage?

Fibrocartilage contains large bundles of collagen fibres made up of Type I collagen. These bundles run linearly through the tissue separated by a cartilage matrix containing chondrocytes.

What type of joint is intervertebral disc?

Each disc allows for limited movement between the vertebrae and thus functionally forms an amphiarthrosis type of joint. Intervertebral discs are made of fibrocartilage and thereby structurally form a symphysis type of cartilaginous joint.

Does the sacrum have discs?

The intervertebral discs are usually absent in the sacrum and coccyx due to the fusion of these vertebrae. ... The nucleus pulposus part of the intervertebral disc is formed from the notochord cells while the annulus fibrosus develops from the mesenchymal cells.

What are the function of the intervertebral disc?

The inter- vertebral disc serves primarily to allow movement between adjacent vertebral bodies, to absorb shock, and to transmit loads through the vertebral column. The complex morphology and structure of the intervertebral disc of the lumbar spine reflects these functions.

How do intervertebral discs get nutrients?

The disc is avascular, and the disc cells depend on diffusion from blood vessels at the disc's margins to supply the nutrients essential for cellular activity and viability and to remove metabolic wastes such as lactic acid.

What are Z joints?

The facet joints, (or zygapophysial joints, zygapophyseal, apophyseal, or Z-joints) are a set of synovial, plane joints between the articular processes of two adjacent vertebrae. There are two facet joints in each spinal motion segment and each facet joint is innervated by the recurrent meningeal nerves.

What is the major function of the intervertebral discs quizlet?

What is the function of the intervertebral discs? The intervertebral discs act as shock absorbers and provide flexibility to the spine, allowing it to flex and extend.

What is the nucleus pulposus and annulus fibrosus of an intervertebral disc quizlet?

- The nucleus pulposus is a soft, elastic, gelatinous core and the annulus fibrosus is a tough outer ring of fibrocartilage. - The nucleus pulposus connects the spinous processes of two adjacent vertebrae and the annulus fibrosus is the fibrocartilage disc.

What are the functions of the annulus fibrosus?

The annulus fibrosus is the strong wrapping that makes up the outside portion of the intervertebral disc. Its job is to contain and protect the soft material located in the center of the disc. This soft center is called the nucleus pulposus.

Will degenerative disc disease get better?

Answer: Unfortunately, there's currently no cure for degenerative disc disease, and once you're diagnosed with DDD, it's typically a lifelong journey of learning to live with back pain, neck pain, or other symptoms. Once your discs begin to degenerate, you can't really reverse the process.