An explorative investigation of functional differences in plantar center of pressure of four foot types using sample entropy method.

	An explorative investigation of functional differences in plantar center of pressure of four foot types using sample entropy method.
	Mei, Zhanyong; Ivanov, Kamen; Zhao, Guoru; Li, Huihui; Wang, Lei
刊名	MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
	2017
文献子类	期刊论文
英文摘要	In the study of biomechanics of different foot types, temporal or spatial parameters derived from plantar pressure are often used. However, there is no comparative study of complexity and regularity of the center of pressure (CoP) during the stance phase among pes valgus, pes cavus, hallux valgus and normal foot. We aim to analyze whether CoP sample entropy characteristics differ among these four foot types. In our experiment participated 40 subjects with normal feet, 40 with pes cavus, 19 with pes valgus and 36 with hallux valgus. A Footscan (R) system was used to collect CoP data. We used sample entropy to quantify several parameters of the investigated four foot types. These are the displacement in medial-lateral (M/L) and anterior-posterior (A/P) directions, as well as the vertical ground reaction force of CoP during the stance phase. To fully examine the potential of the sample entropy method for quantification of CoP components, we provide results for two cases: calculating the sample entropy of normalized CoP components, as well as calculating it using the raw data of CoP components. We also explored what are the optimal values of parameters m (the matching length) and r (the tolerance range) when calculating the sample entropy of CoP data obtained during the stance phases. According to statistical results, some factors significantly influenced the sample entropy of CoP components. The sample entropies of non-normalized A/P values for the left foot, as well as for the right foot, were different between the normal foot and pes valgus, and between the normal foot and hallux valgus. The sample entropy of normalized M/L displacement of the right foot was different between the normal foot and pes cavus. The measured variable for A/P and M/L displacements could serve for the study of foot function.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/11975]
专题	深圳先进技术研究院_医工所
作者单位	MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
推荐引用方式 GB/T 7714	Mei, Zhanyong,Ivanov, Kamen,Zhao, Guoru,et al. An explorative investigation of functional differences in plantar center of pressure of four foot types using sample entropy method.[J]. MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING,2017.
APA	Mei, Zhanyong,Ivanov, Kamen,Zhao, Guoru,Li, Huihui,&Wang, Lei.(2017).An explorative investigation of functional differences in plantar center of pressure of four foot types using sample entropy method..MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING.
MLA	Mei, Zhanyong,et al."An explorative investigation of functional differences in plantar center of pressure of four foot types using sample entropy method.".MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING (2017).