![]() The damage can be caused by a herniated disc, bone spur, or narrowing of the spine. Sciatica can get worse after a nerve conduction study if the test shows that the sciatic nerve is damaged. The electrical activity of the muscles is measured when the nerve is stimulated. In the second part of the test, electrodes are placed on the skin over the muscles. The electrical activity of the nerve is then measured. A small shock is passed through the electrode to stimulate the nerve. In the first part, electrodes are placed on the skin over the nerve that is being tested. A nerve conduction study is a test that measures the electrical activity of the nerves. Sciatica can cause pain, numbness, tingling, or weakness in the leg. ![]() The sciatic nerve runs from the lower back through the buttock and down the leg. ![]() Sciatica is a condition that can be caused by a herniated disc, bone spur, or narrowing of the spine. ![]()
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