tailieunhanh - Báo cáo hóa học: " Robust EEG Channel Selection across Subjects for Brain-Computer Interfaces"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Robust EEG Channel Selection across Subjects for Brain-Computer Interfaces | EURASIP Journal on Applied Signal Processing 2005 19 3103-3112 2005 Hindawi Publishing Corporation Robust EEG Channel Selection across Subjects for Brain-Computer Interfaces Michael Schroder 1 Thomas Navin Lal 2 Thilo Hinterberger 3 Martin Bogdan 1 N. Jeremy Hill 2 Niels Birbaumer 3 Wolfgang Rosenstiel 1 and Bernhard Scholkopf2 1 Department of Computer Engineering Eberhard-Karls University Tubingen Sand 13 72076 Tubingen Germany Emails schroedm@ bogdan@ rosenstiel@ 2 Max Planck Institute for Biological Cybernetics Spemannstrasse 38 72076 Tubingen Germany Emails navin@ jez@ bs@ 3 Institute of Medical Psychology and Behavioral Neurobiology Eberhard-Karls University Tubingen Gartenstrasse 29 72074 Tubingen Germany Emails Received 11 February 2004 Revised 22 September 2004 Most EEG-based brain-computer interface BCI paradigms come along with specific electrode positions for example for a visualbased BCI electrode positions close to the primary visual cortex are used. For new BCI paradigms it is usually not known where task relevant activity can be measured from the scalp. For individual subjects Lal et al. in 2004 showed that recording positions can be found without the use of prior knowledge about the paradigm used. However it remains unclear to what extent their method of recursive channel elimination RCE can be generalized across subjects. In this paper we transfer channel rankings from a group of subjects to a new subject. For motor imagery tasks the results are promising although cross-subject channel selection does not quite achieve the performance of channel selection on data of single subjects. Although the RCE method was not provided with prior knowledge about the mental task channels that are well known to be important from a physiological point of view were .