For decades electroencephalography (EEG),
the recording of brain potentials through electrodes on the
scalp, has been used to evaluate neurological disorders and
to study the brain. The availability of powerful digital
hardware and analysis algorithms has opened the door to the
brain-computer interface (BCI) field, where the users brain
activity is directly used to issue commands to a device.
Potentially, this could be helpful for people whose
movements are impaired by a disease or a trauma. This...