Brain-Computer Interface Systems
Please follow the links below to view written information and videos about our brain-computer interface systems for assistive technologies.
Basic Design of a BCI System for Assistive Technology Control
In BCIs using visual, auditory, or tactile
stimuli, a computer selects stimuli to be presented to the user via a
presentation device (e.g. display, headphones, or tactors), and the user's
reactions produce brain signals. In self-driven BCIs, the user spontaneously
produces brain signals;the left-hand portion of the figure (in gray) does not
apply in these systems. In either case, the brain signals are processed and
digitized by signal acquisition hardware and sent to the computer for analysis.
If the computer has sufficient evidence to infer the user's intent, it sends a
control command to the AT software or device. If not, it initiates the
presentation of additional stimuli to the user, or, in the case of self-driven
BCIs, awaits additional information from the user. In many systems, the user
simultaneously receives input from the stimulus presentation device and
feedback from the AT.