Brain-Computer Interface

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g.BCIsys

BCI2000

ActiveTwo

The Brain-Computer Interface (BCI)

A Brain-Computer Interface (BCI) provides a new communication channel between the human brain and the computer. Mental activity leads to changes of electrophysiological signals like the Electroencephalogram (EEG) or Electrocorticogram (ECoG). The BCI system detects such changes and transforms it into a control signal which can, for example, be used as spelling device or to control a cursor on the computer monitor. One of the main goals is to enable completely paralyzed patients (locked-in syndrome) to communicate with their environment.

Two learning systems

An interesting question for the development of a BCI is how to handle two learning systems: The machine should learn to discriminate between different patterns of brain activity as accurate as possible and the user of the BCI should learn to perform different mental tasks in order to produce distinct brain signals.

BCI research makes high demands on the system and software used. Parameter extraction, pattern recognition and classification as well as the generation of neurofeedback for a successful training of the user has to run in real-time.

Additional information

g.BCIsys

g.tec provides complete MATLAB-based development/research systems including all hard- and software components needed for data acquisition, real-time and off-line data analysis, data set classification and for providing neurofeedback. The BCI system can be realized with g.MOBIlab+, g.USBamp or g.BSamp.

BCI2000

BCI2000 is a general-purpose system for BCI research and development. It can also be used for data acquisition, stimulus presentation, or brain observation applications. BCI2000 has been in development since 2000 in a collaborative effort led by the Wadsworth Center, Albany, New York, USA. BCI2000 has been used to replicate or extend current BCI methods in humans, and has recently been used in a number of groundbreaking BCI studies.

ActiveTwo

ActiveTwo is a powerful high-resolution biosignal acquisition system that incorporates some revolutionary concepts. Active electrode technology is just one of the significant innovations in the ActiveTwo system. By placing active electronics within millimeters of the actual electrode contact, ActiveTwo virtually eliminates the need to prepare the skin before applying electrodes. This can cut measurement preparation time by an estimated 15 -30 minutes for most laboratories!

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