Results were compared when the same tests were done on 15 normal, healthy adults (control group). Testing was done on 23 patients with piriformis syndrome. Magnetic stimulation of the nerve is painless and can be used to test the deep nerves such as the sciatic nerve. NCV to measure the speed of signals along the sciatic nerve are invasive and can be painful. MRI or ultrasound studies are not always able to pinpoint the cause of buttock pain. Symptoms include buttock and/or leg pain, numbness, tingling, and muscle weakness. Piriformis syndrome is a group of symptoms caused by pressure on the sciatic nerve as it passes through the piriformis muscle in the buttocks. In this study, scientists compare the results of needle electromyography (EMG) tests with magnetic nerve conduction velocity (NCV) tests to diagnose piriformis syndrome.
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