EEG-based communication: presence of an error potential

被引:136
作者
Schalk, G
Wolpaw, JR
McFarland, DJ
Pfurtscheller, G
机构
[1] New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12201 USA
[2] SUNY Albany, Albany, NY 12201 USA
[3] Graz Univ Technol, Inst Biomed Engn, Dept Med Informat, A-8010 Graz, Austria
关键词
error potential; event related potential; error related negativity; brain-computer interface; mu rhythm; sensorimotor cortex; electroencephalography; augmentative communication; rehabilitation;
D O I
10.1016/S1388-2457(00)00457-0
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Background: EEG-based communication could be a valuable new augmentative communication technology for those with severe motor disabilities. Like all communication methods, it faces the problem of errors in transmission. In the Wadsworth EEG-based brain-computer interface (BCI) system, subjects learn to use mu or beta rhythm amplitude to move a cursor to targets on a computer screen. While cursor movement is highly accurate in trained subjects, it is not perfect. Methods: In an effort to develop a method for detecting errors, this study compared the EEG immediately after correct target selection to that after incorrect selection. Results: The data showed that a mistake is followed by a positive potential centered at the vertex that peaks about 180 ms after the incorrect selection. Conclusion: The results suggest that this error potential might provide a method for detecting and voiding errors that requires no additional time and could thereby improve the speed and accuracy of EEG-based communication. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
引用
收藏
页码:2138 / 2144
页数:7
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