It is a condition in which the annulus fibrosus (outer portion) of the vertebral disc is torn, enabling the nucleus (inner portion) to herniate or extrude through the fibers.
Thoracic Herniated Disc Video. A herniated disc is a condition in which the annulus fibrosus (outer portion) of the vertebral disc is torn, enabling the nucleus (inner portion) to herniate or extrude through the fibers. The herniated disc material is similar to crab meat in constitution. During surgery, generally only the disc material compressing the nerve will be removed, and most (95%) of the intervertebral disc material is left in place. Herniated disc: Rupturing of the tissue that separates the vertebral bones of the spinal column. The center of the disc, which is called the nucleus, is soft, springy and receives the shock of standing, walking, running, etc. The outer ring of the disc, which is called the annulus (Latin for ring), provides structure and strength to the disc. The annulus consists of a complex series of interwoven layers of fibrous tissue that hold the nucleus in place. A herniated disc is often referred to as a slipped disc. This term came from the action of the nuclear tissue when it is forced from the center of the disc. The nuclear tissue located in the center of the disc can be placed under so much pressure that it can cause the annulus to rupture Brain herniation is a potentially deadly side effect of very high intracranial pressure that occurs when a part of the brain is squeezed across structures within the skull.  Disk herniation most commonly affects the lumbar region between the fifth lumbar vertebra and the first sacral vertebra. However, disk herniation can also occur in the cervical spine. The incidence of cervical disk herniation is most common between the fifth and sixth cervical vertebrae. Surgery versus conservative management of sciatica due to a lumbar herniated disc: A systematic review. European Spine Journal, 20 (4), 513–22. 1  The benefits of surgical management to treat symptoms of a lumbar herniated disk have not been substantiated. Herniated disk. A herniated disk refers to a problem with one of the rubbery cushions (disks) between the individual bones (vertebrae) that stack up to make your spine. A spinal disk is a little like a jelly donut, with a softer center encased within a tougher exterior. Sometimes called a slipped disk or a ruptured disk, a herniated disk occurs when some of the softer jelly pushes out through a crack in the tougher exterior.  Spinal disc herniation, also known as a slipped disc, is a medical condition affecting the spine in which a tear in the outer, fibrous ring of an intervertebral disc allows the soft, central portion to bulge out beyond the damaged outer rings. Most disc herniations occur when a person is in their thirties or forties when the nucleus pulposus is still a gelatin-like substance. With age the nucleus pulposus changes (dries out) and the risk of herniation is greatly reduced. Disk herniation is a rupture of fibrocartilagenous material (annulus fibrosis) that surrounds the intervertebral disk. This rupture involves the release of the disk's center portion containing a gelatinous substance called the nucleus pulposus. Surgery versus conservative management of sciatica due to a lumbar herniated disc: A systematic review. European Spine Journal, 20 (4), 513–22. 1  The benefits of surgical management to treat symptoms of a lumbar herniated disk have not been substantiated. Predisposing factors associated with disk herniation include age, gender, and work environment. The peak age for occurrence of disk herniation is between 20-45 years of age. Studies have shown that males are more commonly affected than females in lumbar disk herniation by a 3:2 ratio. Surgery versus conservative management of sciatica due to a lumbar herniated disc: A systematic review. European Spine Journal, 20 (4), 513–22. 1  The benefits of surgical management to treat symptoms of a lumbar herniated disk have not been substantiated. The herniated material can compress the nerves around the disc and create pain that can radiate through the back and sometimes down the arms (if the herniation is in the cervical spine) and legs (if the herniation is in the lumbar spine). The herniated disc material is similar to crab meat in constitution. During surgery, generally only the disc material compressing the nerve will be removed, and most (95%) of the intervertebral disc material is left in place. Physical therapists are skilled in treating acute back pain caused by the disk herniation. The physical therapist can provide noninvasive therapies, such as ultrasound or diathermy to project heat deep into the tissues of the back or administer manual therapy, if mobility of the spine is impaired. Surgery versus conservative management of sciatica due to a lumbar herniated disc: A systematic review. European Spine Journal, 20 (4), 513–22. 1  The benefits of surgical management to treat symptoms of a lumbar herniated disk have not been substantiated.
http://www.spine-health.com/glossary/herniated-disc http://www.medicinenet.com/script/main/art.asp?articlekey=10661 https://en.wikipedia.org/wiki/Brain_herniation http://medical-dictionary.thefreedictionary.com/herniated+disk http://www.mayoclinic.org/diseases-conditions/herniated-disk/basics/definition/CON-20029957 https://en.wikipedia.org/wiki/Spinal_disc_herniation http://medical-dictionary.thefreedictionary.com/herniated+disk http://medical-dictionary.thefreedictionary.com/herniated+disk http://www.spine-health.com/glossary/herniated-disc http://medical-dictionary.thefreedictionary.com/herniated+disk
what is the meaning of herniated