表面肌电手势解码中的健全到截肢者迁移：训练源与校准预算
Intact-to-Amputee Transfer in Surface-EMG Gesture Decoding: Training Source and Calibration Budget
- University of Saskatchewan（萨斯喀彻温大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究将表面肌电手势解码编码器从健全者迁移至截肢者，发现需少量校准数据，结合健全与截肢训练源最优，并界定基线强度解释的适用范围。
AI中文摘要：
在一人身上训练出的识别器很少能迁移到下一人，且有用的性能通常需要最终用户进行新一轮的带标签校准。对1077项研究的系统回顾量化了证据薄弱之处：截肢者仅出现在约六分之一的研究中。在此，一个与电极布局无关的跨用户编码器被应用于十一名经桡骨截肢者，其协议与其健全肢体训练数据相匹配。零样本跨群体迁移完全失败：编码器在开始解码前需要新用户的带标签数据，之后在三轮重复及队列中每个受试者上，其性能超过诊所将拟合的单用户分类器0.190宏F1分数。在给定三轮带标签重复时，其达到0.779宏F1，而单用户流程为0.589。在四十名健全受试者上训练比在十名其他截肢者上训练能产生更好的对新截肢者的迁移，且将两者结合比单独任一种产生更好的迁移。本研究预先注册的预测，该预测以截肢者肌电信号可分性较差的假设扩展了编码器的基线强度解释，仅在几轮重复可用且用额外截肢者丰富源池后才成立。在单次重复及在与健全肢体比较匹配的源下的每个预算下，该预测失败。因此，它定位了所提出解释的边界。
英文摘要：
A recogniser trained on one person rarely transfers to the next, and useful performance usually demands a fresh round of labelled calibration from the end user. A systematic review of 1077 studies quantifies where the evidence is thin: amputees appear in about one in six. Here a montage-agnostic cross-user encoder is carried to eleven transradial amputees on a protocol matched to its intact-limb training data. Zero-shot cross-population transfer fails outright: the encoder requires labeled data from the new user before it begins decoding, and it then exceeds the per-user classifier a clinic would fit by 0.190 macro F1 at three repetitions and for every subject in the cohort. Given three labelled repetitions it reaches 0.779 macro-F1 against 0.589 for the per-user pipeline. Training on forty intact subjects produces better transfers to a new amputee than training on ten other amputees, and combining the two produces better transfers than either individually. The prediction pre-registered for this study, which extends the encoder's baseline-strength account with the premise that amputee EMG is less separable, holds true only after a few repetitions become available and after enriching the source pool with additional amputees. At a single repetition, and at every budget under a source matched to the intact-limb comparison, it fails. Thus, it locates the boundary of the proposed account.
