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首页> 外文期刊>Brain research. Cognitive brain research >Imagery of motor actions: differential effects of kinesthetic and visual-motor mode of imagery in single-trial EEG.
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Imagery of motor actions: differential effects of kinesthetic and visual-motor mode of imagery in single-trial EEG.

机译:运动动作图像:在单次试验脑电图中,动觉和视觉运动模式的图像产生不同的影响。

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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.
机译:单次尝试运动图像分类是许多脑机接口(BCI)系统的组成部分。使用以下实验条件解决了涉及动作的运动学或视觉表示的影像类型的可能意义:动觉运动影像(MIK),视觉运动影像(MIV),运动执行(ME)和运动观察(OOM)。基于14位惯用右手的参与者的多通道EEG记录,我们应用了学习分类器,区分敏感学习矢量量化(DSLVQ)来识别相关特征(即频段,电极部位)以识别相应的心理状态。对于ME和OOM,总体分类精度约为80%。 MIK(67%)的结果优于MIV(56%)的结果。此外,在运动感觉成像过程中发现的活动焦点靠近感觉运动手区域,而视觉运动图像并未揭示清晰的空间格局。因此,为了改善基于运动图像的BCI控制,用户培训应强调动觉体验而不是动作的视觉表示。

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