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Using rest class and control paradigms for brain computer interfacing

 
: Fazli, S.; Danoczy, M.; Popescu, F.; Blankertz, B.; Müller, K.-R.

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Cabestany, J.:
10th International Work-Conference on Artificial Neural Networks 2009. Vol.1: Bio-inspired systems: Computational and ambient intelligence : Salamanca, Spain, June 10-12, 2009 ; proceedings
Berlin: Springer, 2009 (Lecture Notes in Computer Science 5517)
ISBN: 3-642-02477-7
ISBN: 978-3-642-02477-1
ISSN: 0302-9743
pp.651-665
International Work Conference on Artificial Neural Networks (IWANN) <10, 2009, Salamanca>
English
Conference Paper
Fraunhofer FIRST ()

Abstract
The use of Electro-encephalography (EEG) for Brain Computer Interface (BCI) provides a cost-efficient, safe, portable and easy to use BCI for both healthy users and the disabled. This paper will first briefly review some of the current challenges in BCI research and then discuss two of them in more detail, namely modeling the "no command" (rest) state and the use of control paradigms in BCI. For effective prosthetic control of a BCI system or when employing BCI as an additional control-channel for gaming or other generic man machine interfacing, a user should not be required to be continuously in an active state, as is current practice. In our approach, the signals are first transduced by computing Gaussian probability distributions of signal features for each mental state, then a prior distribution of idle-state is inferred and subsequently adapted during use of the BCI. We furthermore investigate the effectiveness of introducing an intermediary state between state pro babilities and interface command, driven by a dynamic control law, and outline the strategies used by 2 subjects to achieve idle state BCI control.

: http://publica.fraunhofer.de/documents/N-188351.html