Abstract: Event-related potentials (ERPs) develop promptly as one kind of special evoked potentials. And it is one of the most effective methods to investigate human′s cognition function in these years. P300 is the component of ERPs which is widely and maturately researched and has intimate relation with attention, memory and other high psychological activity. The evaluation of recognition change after brain injury is the focus of the research. With the development of relatively research, it is deemed that this technique has wide application perspective in many aspects such as forensic clinical medicine and forensic psychiatry.

Key words: event-related potentials, ERPs, P300, brain injury