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Rehabilitation Practice and Science

Translated Title

正常人蹠骨尖峰壓力區之壓力時間曲線分析

Abstract

The purpose of this study was to describe the characteristics of the pressure-time curve under the peak metatarsal pressure site during walking. Plantar pressures were measured at the forefoot area of 30 healthy adults during walking using high resolution transducers with the first step method. The pressure data at each time frame under the peak metatarsal pressure site were extracted and analyzed. A mathematic model was calculated to approximate this curve with the least square residual. The patterns of pressure-time curves under the peak metatarsal pressure sites were very similar in all subjects. After forefoot contact, it was an increasing curve which had two different components with different slopes. The approximate model of the pressure-time curve with least square residual at peak pressure site was the cubic equation which can be expressed as P(t)=α(superscript *)t^3+β(superscript *)t^2+γ(superscript *)t+δ. The means of coefficients of approximate function α was 13491±8214, β was -9005±5643, γ was 2414±1496, and δ was 2400±1102 (the unit of P(t) is kPa, and t is second). The correlations between weight, height and each coefficient (α, β, and γ) were statistically insignificant. Further study in the correlation between pathological conditions and changes of the pressure-time curves should be conducted.

Language

English

First Page

209

Last Page

214

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