![]() The EMG can also be used to detect true weakness, as opposed to weakness from reduced use because of pain or lack of motivation. The EMG helps to distinguish between muscle conditions in which the problem begins in the muscle and muscle weakness due to nerve disorders. Why is an EMG test done?Īn EMG is most often performed when patients have muscle pain, numbness, tingling or weakness. An EMG is also referred to as a myogram.ĮMG's can be used to detect abnormal muscle electrical activity that can occur in many diseases and conditions, including muscular dystrophy, inflammation of muscles, pinched nerves, peripheral nerve damage (damage to nerves in the arms and legs), amyotrophic lateral sclerosis (ALS) (also known as Lou Gehrig disease), myasthenia gravis, disc herniation, and others. This current is usually proportional to the level of the muscle activity. ![]() When muscles are active, they produce an electrical current. An electromyogram is a graphic record of the study. Electromyography (EMG) is a test that is used to record the electrical activity of muscles.
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