Detección de potenciales evocados en época única

Abstract

A Single-Trial detection for Evoked Potentials is presented, it was tested with Event Related Potentials (oddball) which are used in the Donchin's Speller. The scheme is based in inner product of registered potentials over signal subspaces, estimated by principal components analysis. Different combinations of projection coefficients were used as characteristic vectors for a gaussian Support Vector Machine classifier. To assess the scheme performance, the ROC area and accuracy were evaluated. Procedures were tested on 9 healthy subjects. Results suggest that the scheme could be used on line. © Springer-Verlag Berlin Heidelberg 2007.