When you are experiencing symptoms of a nerve or muscle disorder, such as muscle weakness, tingling, numbness or muscle cramping, your doctor may recommend that you undergo a procedure called an electromyography (EMG). The procedure is used to evaluate the health of your muscles and the nerve cells that control them.
The results of an EMG can help to diagnose or rule out some neurological conditions such as muscular dystrophy, carpal tunnel syndrome, polio and herniated discs in the spine. The procedure has minimal risks and complications are very rare.
During an EMG, electrodes will be placed at various locations on your body where you’re experiencing symptoms. The electrodes will transmit tiny electrical currents that may feel like a slight twinge or spasm. Your doctor will determine whether there is any spontaneous electrical activity when the muscle is at rest and will interpret the results of the procedure which will be discussed during a follow-up appointment.