One of the approaches in rehabilitation after a stroke is mental training by representation of movement using a brain-computer interface (BCI), which allows one to control the result of every attempt of imaginary movement. BCI technology is based on online analysis of an electroencephalogram (EEG), detecting moments of imaginary movement representation (reaction of sensorimotor rhythm desynchronization) and presenting these events in the form of changing scenes on a computer screen or triggering electro-mechanical devices, which essentially is feedback. Traditionally used visual feedback is not always optimal for poststroke patients. Earlier, the effectiveness of tactile feedback, triggered only after a long-time mental representation of the movement, for several seconds or more, was studied. In this work, the efficiency of quick tactile feedback with motor-imagery-based BCI was investigated during classification of short (0.5 s) EEG segments. It was shown that quick tactile feedback is not inferior to the visual feedback and that it is possible to create BCI with tactile feedback that allows a quick reward of physiologically effective attempts of motor imagery and operates with acceptable accuracy for practical use. Furthermore, under certain conditions, tactile feedback can lead to a greater degree of sensorimotor rhythm desynchronization in subjects in comparison with the visual feedback, which can serve as a basis for constructing an effective neurointerface training system.

中文翻译：

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具有快速响应的触觉反馈的运动图像脑机接口的特性研究

中风后康复的方法之一是通过使用脑机接口（BCI）来表示运动来进行心理训练，该接口可以控制每一次虚构运动尝试的结果。BCI技术基于对脑电图（EEG）的在线分析，检测虚构运动表示的时刻（感觉运动节律失调的反应）并以在计算机屏幕上改变场景或触发机电设备的形式呈现这些事件。是反馈。对于卒中后患者，传统上使用的视觉反馈并不总是最佳的。早先，研究了仅在长时间的运动心理表示后几秒钟或更长时间才触发的触觉反馈的有效性。在这项工作中 在短（0.5 s）脑电图段分类过程中，研究了基于运动图像的BCI快速触觉反馈的效率。结果表明，快速的触觉反馈并不逊色于视觉反馈，并且可以创建具有触觉反馈的BCI，该BCI可以快速奖励生理学上有效的运动图像尝试，并且在实际使用中具有可接受的精度。此外，在一定条件下，与视觉反馈相比，触觉反馈可导致受试者更大程度的感觉运动节律失调，这可作为构建有效的神经界面训练系统的基础。结果表明，快速的触觉反馈并不逊色于视觉反馈，并且可以创建具有触觉反馈的BCI，该BCI可以快速奖励生理学上有效的运动图像尝试，并且在实际使用中具有可接受的精度。此外，在一定条件下，与视觉反馈相比，触觉反馈可导致受试者更大程度的感觉运动节律失调，这可作为构建有效的神经界面训练系统的基础。结果表明，快速的触觉反馈并不逊色于视觉反馈，并且可以创建具有触觉反馈的BCI，该BCI可以快速奖励生理学上有效的运动图像尝试，并且在实际使用中具有可接受的精度。此外，在一定条件下，与视觉反馈相比，触觉反馈可导致受试者更大程度的感觉运动节律失调，这可作为构建有效的神经界面训练系统的基础。