What Kind of Tissue Makes up the Intervertebral Discs?
The intervertebral discs are the largest structures in the body without a vascular supply. By means of osmosis, each disc absorbs needed nutrients. Each disc is made up of two parts: the annulus fibrosus and the nucleus pulposus. Jan 19, · They also serve to protect the nerves that run down the middle of the spine and intervertebral disks. There are a total of 24 disks in the human spine. The disks are made of fibrocartilaginous.
The intervertebral discs make up one fourth of the spinal column's length. Discs are not vascular and therefore depend on the end plates to diffuse needed nutrients. The cartilaginous layers of the end plates anchor the discs in place.
The intervertebral discs are fibrocartilaginous cushions serving as the spine's shock absorbing system. Photo Courtesy of: SpineUniverse. The intervertebral discs are fibrocartilaginous cushions serving as the spine's shock absorbing system, which protect the vertebrae, brain, and other structures i.
The discs allow some vertebral motion: extension and flexion. Individual disc movement is very limited — however considerable motion is possible when several discs combine forces. Intervertebral discs are composed of an annulus fibrosus and a nucleus pulposus. 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. The annulus fibrosus encloses the nucleus pulposus. Although both the annulus fibrosus and nucleus pulposus are composed of water, collagen, and proteoglycans PGsthe amount of fluid water and PGs is greatest in the nucleus pulposus. PG molecules are important because they attract and retain water. The nucleus pulposus contains a hydrated gel—like matter that resists compression. The amount of water in the nucleus varies throughout the day depending on activity.
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Learn more about your spinal nerves and your body's nervous systems. Article explains spinal nerve and spinal cord basics and includes illustrations of spinal anatomy.
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Intervertebral discs are composed of an annulus fibrosus and a nucleus pulposus. Intervertebral discs are composed of an annulus fibrosus and a nucleus pulposus. Photo Courtesy of: usloveescort.com May 11, · It consists of a thick outer ring of fibrous cartilage called the anulus (derived from the Latin word “anus” meaning ring) or annulus (anulus fibrosus disci intervertebralis), which surrounds an inner gel-like centre or more gelatinous core known as the nucleus pulposus (meaning “pulpy interior”). What is the intervertebral disc made of? Intervertebral discs consist of an outer fibrous ring, the annulus fibrosus disci intervertebralis, which surrounds an inner gel-like center, the nucleus pulposus. The annulus fibrosus consists of several layers (laminae) of fibrocartilage made up of .
Average 4. Tested Concept. Four weeks later he continues to have significant low back pain, with no complaints of symptoms in his leg. A T2-weighted MRI is shown in Figure A with a red arrow identifying abnormal signal intensity in an anatomic structure. What type of collagen is primarily responsible for the biological properties of this anatomic structure?
Intervertebral Disc. Derek W. Please rate topic. Upgrade to PEAK. Tested Concept QID: L 3 Question Complexity. Question Importance. L 2 Question Complexity. L 4 Question Complexity. Sort by. All Videos 0 Podcasts 2. Orthobullets Team. Listen Now min. Please login to add comment. Cancel Save. Disc Biomechanics. Disc viscoelastic characteristics demonstrates creep which allows for deformity over time demonstrates hysteresis which allows for energy absorption with repetitive axial compression this property decreases with time Stresses annulus fibrosus highest tensile stresses nucleus pulposus highest compressive stress intradiscal pressure is position dependent pressure is lowest when lying supine pressure is intermediate when standing pressure is highest when sitting and flexed forward with weights in the hands when carrying weight, the closer the object is to the body the lower the pressure Stability following subtotal discectomy, extension is most stable loading mode.
Disc Herniation herniated disks are associated with a spontaneous increase in the production of osteoprotegrin OPG interleukin-1 beta receptor activator of nuclear factor-kB ligand RANKL parathyroid hormone PTH Disc aging leads to an overall loss of water content and conversion to fibrocartilage. Specifically there is a decrease in nutritional transport water content absolute number of viable cells proteoglycans pH increase in an increase keratin sulfate to chondroitin sulfate ratio lactate degradative enzyme activity density of fibroblast-like cells fibroblast-like cells reside in the annulus fibrosus only no change in absolute quantity of collagen.