| The spinal column (vertebral column) is made up of 24 movable bones, or vertebrae (7 cervical vertebrae, 12 thoracic vertebrae, and five lumbar vertebrae) and two fused sections (the sacrum and the coccyx). An intervertebral disc disorder is a protrusion or herniation of one of the gel-like cushions (discs) that separate the vertebrae of the spine. The displaced gel (nucleus pulposus) of the disc may press against the spinal nerves or the spinal cord itself, causing changes in sensory, motor, and reflex function (radiculopathy). Disc disorders of the upper (cervical), mid (thoracic), and lower (lumbar) spine are discussed separately.
See Cervical Disc Disorder with Myelopathy, Thoracic Disc Disorders with Myelopathy, and Lumbar Disc Disorders with Myelopathy for more information.Incidence and Prevalence: Before age 40, approximately 25% of people show evidence of disc degeneration at one or more levels. Past age 40, more than 60% of people show evidence of disc degeneration at one or more levels on MRI (Furman). |
Source: Medical Disability Advisor
| Furman, Michael B., Kirk M. Puttlitz, and Frank Falco. "Cervical Disc Disease." eMedicine. Eds. Everett C. Hills, et al. 21 Nov. 2004. Medscape. 17 Jan. 2005 <http://emedicine.com/pmr/topic25.htm>. |
Source: Medical Disability Advisor