Visual Gate for Brain-Computer Interfaces

被引：1

作者：

Dias, N. S. ^{[1
]}

Jacinto, L. R. ^{[1
]}

Mendes, P. M. ^{[1
]}

Correia, J. H. ^{[1
]}

机构：

[1] Univ Minho, Dept Ind Elect, P-4800058 Guimaraes, Portugal

来源：

2009 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-20 | 2009年

关键词：

ATTENTION;

D O I：

10.1109/IEMBS.2009.5333496

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Brain-Computer Interfaces (BC!) based on event related potentials (ERP) have been successfully developed for applications like virtual spellers and navigation systems. This study tests the use of visual stimuli unbalanced in the subject's field of view to simultaneously cue mental imagery tasks (left vs. right hand movement) and detect subject attention. The responses to unbalanced cues were compared with the responses to balanced cues in terms of classification accuracy. Subject specific ERP spatial filters were calculated for optimal group separation. The unbalanced cues appear to enhance early ERPs related to cue visuospatial processing that improved the classification accuracy (as low as 6%) of ERPs in response to left vs. right cues soon (150-200 ms) after the cue presentation. This work suggests that such visual interface may be of interest in BCI applications as a gate mechanism for attention estimation and validation of control decisions.

引用

页码：532 / 535

页数：4

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