Imagery of motor actions: Differential effects of kinesthetic and visual-motor mode of imagery in single-trial EEG

被引:473
作者
Neuper, C [1 ]
Scherer, R
Reiner, M
Pfurtscheller, G
机构
[1] Graz Univ Technol, Ludwig Boltzmann Inst Med Informat & Neuroinforma, A-8010 Graz, Austria
[2] Graz Univ, Dept Psychol, Graz, Austria
[3] Graz Univ Technol, Lab Brain Comp Interface, Inst Comp Graph & Vis, A-8010 Graz, Austria
[4] Technion Israel Inst Technol, Haifa, Israel
来源
COGNITIVE BRAIN RESEARCH | 2005年 / 25卷 / 03期
关键词
motor imagery; single-trial EEG; event-related (de-)synchronization; ERD/ERS; brain-computer interface (BCI);
D O I
10.1016/j.cogbrainres.2005.08.014
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
Single-trial motor imagery classification is an integral part of a number of brain-computer interface (BCI) systems. The possible significance of the kind of imagery, involving rather kinesthetic or visual representations of actions, was addressed using the following experimental conditions: kinesthetic motor imagery (MIK), visual-motor imagery (MIV), motor execution (ME) and observation of movement (OOM). Based on multi-channel EEG recordings in 14 right-handed participants, we applied a learning classifier, the distinction sensitive learning vector quantization (DSLVQ) to identify relevant features (i.e., frequency bands, electrode sites) for recognition of the respective mental states. For ME and OOM, the overall classification accuracies were about 80%. The rates obtained for MIK (67%) were better than the results of MIV (56%). Moreover, the focus of activity during kinesthetic imagery was found close to the sensorimotor hand area, whereas visual-motor imagery did not reveal a clear spatial pattern. Consequently, to improve motor-imagery-based BCI control, user training should emphasize kinesthetic experiences instead of visual representations of actions. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:668 / 677
页数:10
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