EMG (Electromyogram)/Nerve Conduction Studies (NCS)

An EMG/NCS is an electrodiagnostic test to examine your nerves and muscles.

An EMG/NCS is an electrodiagnostic test to examine your nerves and muscles. It is usually a two-part procedure consisting of nerve conduction studies and an electromyogram (EMG). Nerve conduction studies (NCS) are performed by taping an electrode on the skin and giving small electrical pulses to a nerve. Although this gives an unusual sensation, it is not generally considered painful. Measurements are then taken to determine how fast and well a nerve transmits messages.

The Electromyogram (EMG) test evaluates the electrical activity in your muscles. A fine needle electrode is inserted into the muscle, which picks up the electricity normally present in the muscle. No electric shocks are given. The muscle’s electric activity is displayed on a screen and heard through a speaker so we can see and hear it. While the test takes about one to one-and-half hours to perform, the time may vary depending on the reason for the test.

How to Prepare for the EMG/NCS:

Do not use lotion, bath oils, or creams.
Wash arms and legs well to remove all body oils.
Wear loose-fitting, comfortable clothes.
Eat normal meals.
Take regular medications as directed.
Bring a list of current medications.