ABSTRACT
This chapter introduces the reader to brain–computer interfaces (BCIs), providing an overview of the different applications of these systems as assistive technology for different patient populations. First, we provided a definition and description of BCI systems, and we described different electrophysiological and neuroimaging techniques through which brain activity can be recorded for BCI applications. Furthermore, we described different practical uses of BCIs, particularly for restoring communication and for motor rehabilitation of patients with impaired mobility. Finally, we tackled the issue of BCI usability and the need to develop BCIs that adapt to the user's affective and cognitive state.
