Watch this video to understand how electromyography works. It can detect abnormal electrical activity of muscles and nerves that can occur in many diseases and conditions, including muscular dystrophy, muscle inflammation, pinched nerves, damage to nerves in the arms and legs (peripheral nerve damage) and carpal tunnel syndrome. An electrogram procedure may be performed when patients have unexplained muscle weakness to distinguish if the problem is in the muscle or if it is due to nerve disorders. The electrogram procedure can provide information about the extent of nerve and/or muscle injury and can give some indication as to whether the damage is reversible. Will I get any pain or discomfort during the test The electrical shocks given during nerve test and needle insertion in muscle test are painful. There may be a small amount of pain when the needle is put in. These needles pick up both normal and abnormal electrical signals given off by a muscle when you move them. A new needle is used for each patient and it is thrown away after the test. The needle exam involves inserting very fine needles into several muscles.The doctor then records your readings with the muscle at rest and under contraction. This measures how well electricity moves through your nerves. You may feel a quick, sharp pain during the insertion of the electrode. The nerve conduction study involves stimulating the nerves at different points with small electric stimulation.The results can help your doctor find problems linked to certain disorders or conditions. It consists of two parts: a nerve conduction study and a needle exam for muscle testing. The test can confirm normal function or estimate. The electrogram (EMG) procedure is a test of your muscles and nerves. An EMG or NCS may be ordered if you have pain, tingling, numbness, or unexplained weakness in the arms or legs.

Electromyography sends electrical signals through nerves to diagnose nerve problems.

Are emg test painful