 EMG An electromyography is an invasive diagnostic procedure to assess the health of muscle and nerve cells that control them. Before undergoing this procedure, please inform your doctor if you are on blood thinners or have a history of bleeding tendencies. During this procedure, a small thin needle electrode is inserted into several muscles to look for the disease while electrographic readings are being taken. The entire procedure takes around 1-2 hours depending on the number of muscles to be tested. You may feel slight pain or minor bleeding around the electrode insertion point during the test. Post procedure, you may resume your daily routine activities. There are no long lasting side effects of this procedure. Your reports will be issued in an hour at the reception after the procedure.