Brainloop

4. BCI - Brain–computer interfaces
	4.2. Present-day BCIs

Present-day BCIs fall into 5 groups based on the electrophysiological signals they use.

The first group, those using VEPs (4.2.1.), are dependent BCIs, i.e. they depend on muscular control of gaze direction.

The other 4 groups, are believed to be independent BCIs and use:

- Slow cortical potentials
- P300 evoked potentials
- Mu and beta rhythms
- Cortical neuronal action potentials

4. BCI - Intro
	4.1. Definition and features of a BCI   4.1.1. Dependent and independent BCIs 4.1.2. BCI use is a skill 4.1.3. The parts of a BCI   4.1.3.1. Signal acquisition 4.1.3.2. Signal processing: feature extraction 4.1.3.3. Signal processing: the translation algorithm 4.1.3.4. The output device 4.1.3.5. The operating protocol 4.2. Present-day BCIs   4.2.1. Visual evoked potentials 4.2.2. Slow cortical potentials 4.2.3. P300 evoked potentials 4.2.4. Mu and beta rhythms   4.2.4.1. The Wadsworth BCI 4.2.4.2. The Graz BCI 4.2.5. Cortical neuronal action potentials 4.3. The future of BCI-based communication

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Source: Brain–computer interfaces for communication and control, Clinical Neurophysiology 113 (2002) 767–791, Jonathan R. Wolpaw, Niels Birbaumer, Dennis J. McFarland, Gert Pfurtscheller, Theresa M. Vaughan