Evoked potential

In neuropysiology, 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 electroencephalagraph[?] (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[?].