Force myography (FMG), is shown to be a promising alternative to electromyography in locomotion classification. However, the placement of force myography sensors over the thigh during locomotion is not yet clear. To this end, an inhouse developed FMG strap was placed over the thigh muscles of healthy/amputees, while walking on different terrains. The performance of the system was tested on six healthy and two amputees during the five different placements of FMG strap i.e., base, distal, lateral, medial, and proximal. The study reveals that there is an increase in average accuracy (STD) from [mean (STD)] 96.4% (4.0) to 99.5% (0.5) for healthy individuals and 95.5% (3.0) to 99.1% (0.3) for amputees while moving the FMG strap to the proximal of the thigh/stump. The study further determines the combination of three FMG channels on anterior side (Rectus Femoris, Vastus lateralis, and Iliotibial Tract muscles) that provides classification accuracy at par (p > 0.05) to utilizing all eight channels for locomotion classification. The variation of humidity throughout the trials did not significantly (p > 0.05) affect the classification accuracy. The study concludes that the optimal location to place the FMG strap is proximal to the thigh/ stump with a minimum of three FMG channels on the anterior part of the thigh for superior classification accuracy.

中文翻译：

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用于最大限度提高经股截肢者运动分类准确度的最佳力肌图放置：一项试点研究

肌电图 (FMG) 被证明是运动分类中肌电图的有前途的替代方法。然而，在运动过程中在大腿上放置力肌图传感器尚不清楚。为此，在不同地形上行走时，内部开发的 FMG 带被放置在健康/截肢者的大腿肌肉上。该系统的性能在 FMG 带的五种不同位置（即基部、远端、外侧、内侧和近端）期间在 6 名健康者和 2 名截肢者身上进行了测试。研究表明，健康个体的平均准确度 (STD) 从 [mean (STD)] 96.4% (4.0) 增加到 99.5% (0.5)，截肢者从 95.5% (3.0) 到 99.1% (0.3)将 FMG 带移动到大腿/残肢的近端。该研究进一步确定了前侧的三个 FMG 通道（股直肌、股外侧肌和髂胫束肌肉）的组合，该组合提供了标准 (p > 0.05) 的分类精度，以利用所有八个通道进行运动分类。整个试验中湿度的变化对分类精度没有显着影响（p > 0.05）。该研究得出的结论是，放置 FMG 带的最佳位置是靠近大腿/残肢，大腿前部至少有三个 FMG 通道，以提高分类精度。0.05) 影响分类精度。该研究得出的结论是，放置 FMG 带的最佳位置是靠近大腿/残肢，大腿前部至少有三个 FMG 通道，以提高分类精度。0.05) 影响分类精度。该研究得出的结论是，放置 FMG 带的最佳位置是靠近大腿/残肢，大腿前部至少有三个 FMG 通道，以提高分类精度。