Nerve conduction velocity tests are done to locate damage and destruction to the peripheral nervous system, which encompasses all nerves leading from the brain and spinal cord, reports WebMD. This test measures the rate of conduction of electrical impulses through the nerves, notes John Hopkins Medicine.Continue Reading
In the test, electrode patches that stimulate and record electrical impulses are placed on the skin over each nerve being examined, says WebMD. The velocity is calculated by measuring the distance between electrodes and the time it takes the impulses to travel between them. The test may take anywhere from 15 to 60 minutes to complete.
Nerve conduction velocity tests are effective in identifying a number of conditions, including carpal tunnel syndrome, herniated disk disease, pinched nerve, chronic inflammatory polyneuropathy and neuropathy, Guillain- Barré syndrome and Charcot-Marie-Tooth disease, says John Hopkins Medicine.Learn more about Diagnostics & Imaging