Oscillatory EEG based brain-computer interface

Brain-computer interface(BCI)systems support direct communication and control between brain and external devices without any use of peripheral nerves and muscles.It provides a new augmentative technology for those people with severe motor disabilities to convey their intents or to control surrounding devices. As a non-invasive technology,the electroencephalogram(EEG)based BCI has drawn many attentions in BCI studies.Several types of EEG signals have been adopted in EEG based BCI.Among them,oscillatory EEGs have significant advantages of larger amplitude and less sensitive to noise.For these reasons,oscillatory EEG based BCIs have become one of most successful designs in BCI system development.Two of major oscillatory EEG based BCIs will be introduced.They are steady state visual evoked potential(SSVEP)and sensorimotor rhythm (SMR)based BCIs respectively.The physiological background,BCI paradigms,system configurations and signal processing methods will be described in details.The demonstrations showing the potential applications will also be presented.