PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

Voluntary Brain Regulation and Communication with ECoG-Signals
T. Hinterberger, G. Widmann, T.N. Lal, J. Hill, M. Tangermann, W. Rosenstiel, B. Schölkopf, C.E. Elger and N. Birbaumer
Epilepsy and Behavior Volume 13, Number 2, pp. 300-306, 2008.

Abstract

Brain–computer interfaces (BCIs) can be used for communication in writing without muscular activity or for learning to control seizures by voluntary regulation of brain signals such as the electroencephalogram (EEG). Three of five patients with epilepsy were able to spell their names with electrocorticogram (ECoG) signals derived from motor-related areas within only one or two training sessions. Imagery of finger or tongue movements was classified with support-vector classification of autoregressive coefficients derived from the ECoG signals. After training of the classifier, binary classification responses were used to select letters from a computer-generated menu. Offline analysis showed increased theta activity in the unsuccessful patients, whereas the successful patients exhibited dominant sensorimotor rhythms that they could control. The high spatial resolution and increased signal-to-noise ratio in ECoG signals, combined with short training periods, may offer an alternative for communication in complete paralysis, locked-in syndrome, and motor restoration.

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EPrint Type:Article
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Computational, Information-Theoretic Learning with Statistics
Learning/Statistics & Optimisation
Brain Computer Interfaces
Theory & Algorithms
ID Code:4324
Deposited By:Bernhard Schölkopf
Deposited On:13 March 2009