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首页> 外文会议>International IEEE/EMBS Conference on Neural Engineering >Robustness of movement detection techniques from motor execution: Single trial movement related cortical potential
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Robustness of movement detection techniques from motor execution: Single trial movement related cortical potential

机译：电机执行的运动检测技术的鲁棒性：单次试验运动相关皮质潜力

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Alterations in attention are known to modify excitability of underlying cortical structures and thus the activity recorded during non-invasive electroencephalography (EEG). Brain-Computer-Interface systems for neuromodulation are based on reliable detection of intended movements from continuous EEG signals, thereby generating real time feedback to induce neuroplasticity. We have shown in past studies that the movement related cortical potential (MRCP), a slow negative potential commencing 1-2 s prior to movement, can be reliably detected in real time within a single session and used to drive an external device that reproduces the intended movement. In the present study, our main objective was to characterize movement detection performance of two algorithms, when the subject's attention is altered. In nine healthy participants the auditory oddball paradigm was used to modulate attention. All subjects completed a set of movement executions prior to and following the oddball paradigm. The locality preserving projection followed by the linear discriminant analysis (LPP-LDA) and the matched-filter (MF) technique were applied offline for detection of movement. Results show that LPP-LDA significantly outperformed MF. The robustness of the LPP-LDA method was demonstrated by a higher true positive rate (TPR), lower false positive rate (FPR) and a shorter detection latency when attention levels were altered.
机译：众所周知，众所周知，涉及引起的改变，以改变潜在的皮质结构的兴奋性，从而在非侵入性脑电图（EEG）期间记录的活动。用于神经调节的脑电脑界面系统基于来自连续EEG信号的预期运动的可靠性检测，从而产生实时反馈以诱导神经塑性。我们在过去的研究中显示了运动相关皮质电位（MRCP），在移动前开始的慢负极电位，可以在单个会议内实时可靠地检测到1-2秒，并用于驱动再现的外部设备预期运动。在本研究中，我们的主要目标是在改变受试者的注意力时表征两种算法的运动检测性能。在九个健康的参与者中，听觉奇怪的范式被用来调节关注。所有受试者在奇怪的标准范围之后完成了一组运动执行。沿着线性判别分析（LPP-LDA）和匹配过滤器（MF）技术的位置保存投影被离线以进行检测以检测运动。结果表明，LPP-LDA显着优于MF。通过更高的真正阳性率（TPR），较低的假阳性率（FPR）和改变注意力水平时，较高的阳性阳性率（FPR）和较短的检测等待时间来证明了LPP-LDA方法的鲁棒性。

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