HS Stroke dataset: an upper-limb motor imagery EEG dataset of chronic stroke patients

The HS Stroke dataset contains motor imagery (MI) EEG recordings from 14 chronic stroke patients performing left- and right-hand MI tasks. Each participant completed 20 sessions over approximately 20 days, with 200 trials per session, yielding a total of 56,000 MI EEG trials. The dataset also includes pre- and post-training clinical and neurophysiological measures, including FMA, sEMG, and MEPs, providing complementary assessments of motor function and neural activity. All data are organized according to the EEG-BIDS standard, including experimental stimuli, EEG data and derivatives, patient information, and analysis code.With this dataset, we first examined the neurophysiological differences between left- and right-hand MI in stroke patients. Subsequently, we performed a binary classification task using baseline data and state-of-the-art methods, achieving an average classification accuracy of 82.65%. This result affirms the quality of the collected EEG signals and demonstrates their successful discriminability based on the execution of MI tasks. Exploratory analyses further showed that MI-related EEG features are significantly associated with FMA scores, indicating their relevance to motor recovery. We expect that this dataset will support future MI-BCI research and inform post-stroke rehabilitation strategies.

HS Stroke数据集收录了14名慢性脑卒中患者执行左右手运动想象（motor imagery, MI）任务时的脑电图（electroencephalogram, EEG）记录。每位受试者在约20天内完成20轮实验，每轮含200次试次，总计获取56000次运动想象脑电图试次。该数据集还包含训练前后的临床与神经生理学测量指标，包括FMA（Fugl-Meyer运动功能评分）、表面肌电图（surface electromyography, sEMG）及运动诱发电位（motor evoked potentials, MEPs），可为运动功能与神经活动提供互补评估。所有数据均按照脑电图脑成像数据结构（EEG-Brain Imaging Data Structure, EEG-BIDS）标准进行组织，涵盖实验刺激、脑电图数据及其衍生数据、受试者信息与分析代码。依托该数据集，我们首先探究了脑卒中患者左右手运动想象的神经生理学差异。随后，我们采用基线数据与最先进方法开展二分类任务，平均分类准确率达82.65%。这一结果证实了所采集脑电图信号的质量，并证明其可基于运动想象任务的执行实现有效区分。探索性分析进一步显示，与运动想象相关的脑电图特征与FMA评分存在显著关联，表明其与卒中后运动恢复具有相关性。我们期望该数据集可助力未来运动想象-脑机接口（motor imagery-Brain-Computer Interface, MI-BCI）研究，并为卒中后康复策略提供参考依据。