Nerve conduction tests

A nerve conduction velocity study measures the speed of conduction of an electrical impulse through the nerve to see if there has been any damage or loss of function to the peripheral nerves. The test may be ordered when someone has symptoms such as numbness, tingling, pain, and weakness in their arms and legs. The test is sometimes done with an electromyography (EMG) to help differentiate between nerve and muscle disorders.

The test can be done on an outpatient basis. Some people find this procedure uncomfortable.

The test helps to detect or define the presence and severity of damage to the peripheral nerves (peripheral neuropathy) and can give clues to their cause. An EMG test can be used to detect myopathy.