足底圧力分布計測による足構築の解析

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In this paper we deal with the pressure distribution under the foot in the standing position and the correlation be teen its patterns and bonny architecture of the foot. They can worthy in assessing foot contact and load transmission through the foot. We employed the pressure measuring device consists of capacitive pressure sensors which were originally developed in Yokohama System Laboratory and measured 142 feet of 103 normal Japanese subjects. The patterns of the pressure distribution wcre classified into five types (type I-V). Type I represented the most common pattern with main pressure distributed on the metatarsal heads and heel. The remainig lower pressure was also found on the outer side of the sole. Type II showed pressure distribution almost exclusively limited on the metatarsal heads and heel. Type III showed increased pressure distributrd to the outer side of the sole as compared to Type I. Type IV exhibited pressure distribution on the medial side of the foot as compared to Type I. Type V represented so-called flat foot with diffuse presure distribution on the whole planter surface. The incidence of each type was as follows: Type I,51 (35.9%) : Type II, 25 (17.6%): Type III, 31 (21.8%) : TypeIV, 16 (11.3%) and Type V, 19 (13.4%) The height of the medial longitudinal arch and the lateral longitudinal arch of each foot was evaluated by radiographic examination taken at one leg standing position. The relationship between the height of the foot arch and the pressure distribution pattern was as follows; The medial longitudinal arch; Type II >Type I ; Type IV and V <Type I : The lateral longitudinal arch ; Type II>Type I >Type III and V. Thus the height of the foot arch was different among each type of the pressure distribution pattern. lt suggested that our pressure distribution pattern classification correlated with radiographic evaluation of the height of the foot arch. As Type I showed the most common pressure distribution pattern and the height of the foot arch, other types could be classified as variants representing the following categries; Type II ; high arched foot, Type III ; depressed lateral longitudinal arch foot, Type IV ; depressed medial longitudinal arch foot, Type V ; bilaterally depressed arch foot. These results indicated that the pressure distribution pattern classification by new device correlated with three-demensional constitution of the foot.
神戸大学の論文

足底圧力分布計測による足構築の解析

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