Main Page | See live article | Alphabetical index In neurophysiology, an evoked potential is any change in the voltages of a subject's scalp induced by a change in their sensory input. The scalp voltages are typically measured in microvolts by an electroencephalograph (EEG) machine. Evoked potentials are usually done on one sensory mode at a time. Visual evoked potentials may be induced by a flashing light, auditory evoked potentials by the onset of a sound, and somatosensory evoked potentials by a solenoid pulsing against a person's skin. See also : Evoked Response Potentials, Steady-State Evoked Potentials, Visual Evoked Potentials, Auditory Evoked Potentials, Somatosensory Evoked Potentials. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.