A review of methods and applications of brain computer interface systems

Brain-computer interface (BCI) systems provide a device for communication that does not depend on the brain's normal output and peripheral nerves. Recently, BCIs have attracted massive attention, triggered by new scientific progress in understanding brain function and by impressive applications. This paper will study steps in the regular BCI system, various BCI systems, methods used in processing signals, applications, improvements, and current challenges. Finally, BCI possible future trends are discussed.