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Some characteristics of several different BCI systems
| BCI system | Signal | Invasiveness | Training required |
|---|---|---|---|
| P300 | Evoked potential | Noninvasive | Minimal |
| SMR | “Spontaneous” rhythms | Noninvasive | Extensive |
| Single unit | Neuronal spikes | Invasive | Extensive |
| SSVEP | Evoked oscillations | Noninvasive | Minimal |
Abbreviations: BCI, brain-computer interface; SMR, sensorimotor rhythm; SSVEP, steady-state visual evoked potential.
