What an Evoked Potential Test Can Tell You

This test for multiple sclerosis is not invasive, nor is it painful. You’ll lean back in a chair while the technician uses gel to place electrodes that measure responses from nerves in the brain area.

Raw Results

Recorded responses from the electrodes typically come through and are recorded as impedance, also known as electrical resistance. The interval between stimulation and response time is known as latency. These numbers show the speed at which your nerves process a signal.


The most current test is called Visual Evoked Potentials, where a patient views an alternating checkerboard pattern displayed through a monitor. The results of a VEP test are analyzed by specially trained neurologist or neurophysiologist.


Doctors look at the VEP test results in line with other medical information to determine if multiple sclerosis is indeed present in a patient. Test data give an indication of the flow of brain waves. Time between stimulation and response either falls into a normal or abnormal range. Before drawing a conclusion, however, doctors must look at the entire central nervous system for signs of damage.
Symptoms are important indicators of a patient’s health condition, but diagnostic procedures add key data to provide the doctor with additional evidence. Call Lakeside Neurocare Limited at 920-223-5580 to learn about evoked potential tests.

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