Clash Royale CLAN TAG #URR8PPP See also: Evoked potential This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations. (January 2009) (Learn how and when to remove this template message) A waveform showing several ERP components, including the N100 (labeled N1) and P300 (labeled P3). Note that the ERP is plotted with negative voltages upward, a common, but not universal, practice in ERP research An event-related potential ( ERP ) is the measured brain response that is the direct result of a specific sensory, cognitive, or motor event. [1] More formally, it is any stereotyped electrophysiological response to a stimulus. The study of the brain in this way provides a noninvasive means of evaluating brain functioning. ERPs are measured by means of electroencephalography (EEG). The magnetoencephalography (MEG) equivalent of ERP is the ERF, or event-r...