Look Ma, No Hands
The traumatically brain-injured, quadriplegics, and nonverbal persons now have a way to communicate, recreate, contribute to society and even pursue happiness. Technology that interfaces with brainwaves and physical movement, may let impaired persons play video games, adjust lightning, and communicate using an on-screen keyboard. This hands-free computer access solution uses a headband and special software. Introducing Brain Fingers, a trademark of Brain Actuated Technologies. Here’s how.
Facial muscles, brain waves and eye movements are transmitted using electrical signals; the headband has sensors that detect these movements from your forehead. Using a special software that decodes these signals, and recodes them to virtual fingers (hence the name Brain Fingers), allows a keyboard or mouse to access third-party software, gives people with severe disabilities the capability to enjoy computer access.
The headband amplifies and decodes these signals from the forehead using algorithms that separate channels (3) of information. These signals are captured by three plastic sensors and are sent to an interface box that contains a bio-amplifier and signal processor. This box connected to the PC, digitizes, amplifies and translates (by a patented decoding algorithm) into multiple commands which then create a hands-free control interface.
The lowest channel detects eye movements called ElectroOculoGraphic (EOG) signals, the left-right movements of the eye are mapped to left-right movements of the cursor.
The second channel is called the Electroencephalographic (EEG) signal; these frequencies are a reflection of internal brainwave activity. Tensing and relaxing certain facial muscles give users the ability to control these frequencies and are used for vertical and horizontal cursor control.
The third channel is the Electromyography (EMG) signals, which also reflect from facial muscle activity, and is used for keyboard commands, left and right mouse buttons and on and off program commands.
The CyberTrainer software is included and configures the system to the individual users. Certain actions, such as raising an eyebrow, will be different for each user, sensitivity adjustments are then made.
In some studies users were successful at using the BrainFinger system to pick randomly appearing targets in under 4 seconds, all done without using a hand.

http://www.brainfingers.com/