The EMG / electromyogram is a test that evaluates the electrical activity in nerves and muscles. This test is helpful to determine if abnormalities exist in the way nerves transmit electrical impulses or abnormalities to the muscles themselves.

The EMG test consists of two parts:

  • Nerve conduction study (NCS), which evaluates the speed and amount of electrical activity along a nerve
  • EMG study, which looks at electrical activity in muscles at rest and also when they are voluntarily moved (if possible) to determine if the pattern of activity is normal