Your EMG test consists of two parts. The first part is called Nerve Conduction Study. During this test, brief electrical shocks are delivered to your arm or leg to evaluate the status of the peripheral nerve fibers by recording how well small electrical impulses travel through the fiber nerves

The second part of the EMG nerve test is a needle examination – and as the name implies, it involves a small painless needle. There are no electrical shocks during the needle exam and the needles used are thin. Electromyography (EMG) records the electrical activity in the muscle cells directly.

An electroencephalogram (EEG) is a test used to evaluate the electrical activity in the brain. Brain cells communicate with each other through electrical impulse. An EEG can be used to help detect potential problems associated with this activity.

An electrocardiogram (ECG or EKG) is a test to record the electrical signals in the heart. It shows how the heart is beating. Sticky patches called electrodes are placed on the chest and sometimes on the arms or legs.