What is the function of the annulus fibrosus quizlet?
The annulus fibrosus is a rugged ring-like structure that might be compared to a tyre. It completely encases the nucleus pulposus. The purpose of the annulus fibrous is to stabilize the disc, assure that the spine can rotate (twist) properly, and resist compression or other stresses put on the spine.
What is annulus fibrosus in the spine?
The annulus fibrosus is the tough circular exterior of the intervertebral disc that surrounds the soft inner core, the nucleus pulposus. This outer portion is composed of a ring of ligament fibers that encases the inner core of the disc and securely connects the spinal vertebrae above and below the disc.
What are the main functions of intervertebral discs?
It provides cushioning for the vertebrae and reduce the stress caused by impact. They act shock absorber for the spine. They help protect the nerves that run down the spine and between the vertebrae.
What are the 4 functions of the discs in the spine?
The discs throughout the spine have three primary functions: They act as a shock absorbers in the spine, positioned between each bony vertebra. They act as tough ligaments that hold the vertebrae of the spine together. They are cartilaginous joints that allow for slight mobility in the spine.
What is the intervertebral discs made up 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.
How are the bones of the cranium named quizlet?
*The zygomatic bone forms the cheekbone. How are the bones of the cranium named? *The bones of the cranium (frontal, parietal, occipital, and temporal) have the same names as the lobes of the brain.
How does the annulus fibrosus heal?
Treatment Options Regular chiropractic treatments, spinal traction therapy, and physical therapy can also bring relief to individuals suffering from annular tears. If these conservative treatments are not effective, then surgical treatment may be necessary.
How do you sleep with an annular tear?
Take a hot shower or use a heating pad to relax muscles that have become tense throughout the day. Sleep on a supportive mattress — a medium firmness is often recommended — and try to stay in a position that minimizes stress on the spine.
Which intervertebral disc is largest?
The intervertebral discs are largest and thickest in the lumbar region, because these vertebrae carry the bulk of the body’s weight. The discs are thinnest in the upper thoracic region.
What are the 2 components of an intervertebral disc?
The intervertebral disc is made up of two components: the annulus fibrosus and thenucleus pulposus.
Which position puts the least pressure on the spine?
And while it may seem a bit counterintuitive, sitting down to “take a load off” can actually add quite a bit of pressure to our backs. When our back is in its ideal position, with us standing straight up or lying flat, we’re placing the least amount of pressure on the discs between vertebrae.
What can cause damage to the intervertebral discs?
This can be caused by a variety of things, including:
- Bone spurs.
- Certain illnesses, such as diabetes, thyroid disease or rheumatoid arthritis.
- Herniated disc problem.
- Repetitive motion from work.
What is the meaning of the word annulus fibrosus?
annulus fibrosus. Also found in: Wikipedia. The tough fibrous outer zone of the intervertebral disc that normally retains the soft inner nucleus pulposus. Weakness of the annulus fibrosus allows prolapse of the pulpy centre in the condition inaccurately known as ‘slipped disc’. the fibrous ring which encircles each intervertebral disc.
How does the annulus fibrosus tear between adjacent layers?
The annulus fibrosus can tear circumferentially between adjacent fibrous layers, without a complete disruption of the structure containing the nucleus pulposus, or it can rupture radially with a disruption of the disc but without prolapse of nuclear material.
How does annulus fibrosus protect the nucleus pulposus?
The annular fibers prevent the nucleus pulposus, which is comprised of a gelatinous material, from herniating or leaking out of the disc by hydraulically sealing the nucleus and evenly distributing any pressure and force imposed on the intervertebral disc.
What are the effects of bulging annulus fibrosus?
Bulging of the annulus fibrosus results in periosteal elevation and subperiosteal bone formation. Spondylotic ridges (osteophytes) are laid down, and this can result in spinal canal encroachment. These ridges occur most commonly on the concave side of a curvature.