The EMG / electromyogram is a test of the electrical activity in nerves and muscles. This test is helpful to find out if the way a person’s nerves send electrical impulses is normal and if their muscles are normal.

The EMG test has two parts:

  • Nerve conduction study (NCS): This tests the speed and amount of electrical activity.
  • Nerve EMG study: This looks at electrical activity in muscles at rest and when they are moved by choice (if able) to find out if the pattern of activity is normal.