They should also inform their doctors if they have a pacemaker. Before undergoing EMG and NCV testing, patients should alert their doctors to any medications they are taking, as certain medications can affect the nervous system. The examinations may be conducted in a hospital, clinic, or doctor’s office, usually in a room that prevents any outside electrical interference. The test measures the speed and strength of electrical activity in a nerve and can be used to diagnose a number of disorders, including Guillain-Barre and carpal tunnel syndrome. NCV tests find damage to the peripheral nervous system, which includes all the nerves leading away from the brain and spinal cord and the smaller nerves branching out from them. It can also detect conditions such as pinched nerves or inflammation of muscles. By pinpointing the source of the pain, doctors can then devise an appropriate plan of treatment.Īn EMG measures muscle response to nerve stimulation in order to differentiate between a muscle or nerve disorder or find diseases that damage muscle tissue or nerves.
The two separate tests, which are generally conducted during the same appointment, are used to measure the electrical activity of muscles and nerves.
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