Brain-Computer Interfaces

This chapter introduces the field of brain - computer interfaces (BCIs), also called brain-machine interfaces (BMIs), which has seen impressive achievements over the past few years. It first reviews the different kinds of brain signals that can be recorded as input for a BCI. Then, the chapter discusses a series of principles to build efficient BCIs that are independent of the particular signal of choice. There follows a short overview of BCI attempts to improve the outcome of neurorehabilitation, especially for motor control in stroke patients. The chapter concludes by pinpointing some future research directions in the field of BCI.