Herniated Disc
Among the most common causes of Sciatica is a herniated disc. Herniated means to bulge or stick out. The inter-vertebral discs are spongy that form a cushion between the vertebrae of the spine. These discs have strong outer layers made of cartilage with a soft gelatinous like center which acts as a shock absorber. Should the outer layer of the disc become weak usually through age or injury the soft center can herniate through the weakness causing a herniated or ruptured disc.
Spondylolisthesis
During this condition a vertebra slips forward over the vertebra below. This can distort the spinal canal and results in Sciatic Nerve roots being compressed.
Piriformis Syndrome
Many therapists have blamed the Piriformis muscle or Piriformis syndrome for Sciatica. However in my experience it is rarely ever the cause and the treatment of the Piriformis muscle will not cure Sciatic Pain or even provide relief.
Sciatica’s Root Cause
Generally the body’s overall mechanics have a lot to do with Sciatica. Whenever a person sits or stands muscle imbalances in their body cause a Disc Bulge or Herniation because the frame sags or twists under their body weight and gravity.
This can increase the pressure on the Sciatic Nerve where it exits around the L4, L5 or S1 region of the spine. To achieve relief from Sciatica this is what must be treated through special exercises and/or therapies. A simple adjustment, massage or stretches invariably irritate the Sciatic problem rather than relieve pressure from the Sciatic Nerve.
There are key treatment areas to work on in the body to provide relief from Sciatic Symptoms however a general overall full body approach is required to re-balance the muscle system and release pressure from the disc bulge or herniation.
Source:http://www.backpain.com.au
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