Electromyography (EMG) and nerve conduction velocity (NCV)


Electromyography (EMG) and nerve conduction velocity (NCV) are tests that are used in measuring the electrical activity of your muscles and nerves. These tests may be an important part of a spine patient’s diagnosis. Apart from having back pain or neck pain, some patients with a spine-related problem report unexplained symptoms which may include numbness and/or tingling sensations, muscle cramping, or weakness.

EMG and NCV tests are done to help get to the bottom of why those symptoms are occurring.

Why is an EMG NCV test needed?

Your doctor may need these tests if you have symptoms of a nerve disorder or a muscle disorder. These symptoms may include:

  • Weakness of muscle
  • Tingling sensation or a feeling of numbness in arms, legs, hands, feet, and/or face
  • Muscle cramps, spasms, and/or twitching
  • Paralysis of any muscles