Here are the differences, in a nutshell, between two common diagnostic tests used to identify disorders that involve the muscles and nerves: electromyography and nerve conduction studies. Electromyography (EMG) Electromyography records the electrical activity of muscles when at rest or when contracted to determine muscle health. During an electromyography, a pin with a tiny electrode is inserted into the muscle to be tested. The pin is connected to a special recording device. You will be ... [Read More]