Trunk Movement Analysis with FDA: Exploratory Study for the Healthy Subject

C. Amici, Martina Mosso, F. Vérité, M. Tiboni, A. Borboni, S. Negrini
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Abstract

In this work, 48 acquisitions of trunk flexion-extension in healthy subjects are evaluated with the Functional Data Analysis (FDA) approach. Signals are registered with different strategies: i) assigning to the registering function two and three landmark points, and ii) aligning signals to a target profile externally imposed. The results are compared, and the normality profile for the analyzed sample is computed, revealing that the registration with three landmark points represents the best compromise between accuracy and computational burden for the current dataset. The reliability of FDA for the current purpose is investigated with the Leave-One-Out method, and the obtained results suggest the suitability of FDA for the analysis of this kind of data, although further studies should be performed increasing the original dataset in quantity and quality to extend the reliability of the normality profile to the whole healthy population.
用FDA分析躯干运动:对健康受试者的探索性研究
本研究采用功能数据分析(FDA)方法对48例健康受试者的躯干屈伸进行了评估。信号以不同的策略进行注册:i)为注册函数分配两个和三个地标点,以及ii)将信号对准外部强加的目标轮廓。结果进行了比较,并计算了分析样本的正态性曲线,结果表明,对于当前数据集,三个地标点的配准代表了精度和计算负担之间的最佳折衷。使用Leave-One-Out方法对FDA的可靠性进行了调查,结果表明FDA适合分析这类数据,但需要进行进一步的研究,在数量和质量上增加原始数据集,以将正态性概况的可靠性扩展到整个健康人群。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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