Pressure Distribution under the Foot during Static Activities

Arvikar, R.J.; Seireg, A.

doi:10.1243/emed_jour_1980_009_023_02

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…Hallux valgus is considered to be a medial deviation of the first metatarsal and lateral deviation and/or rotation of the hallux with or without medial soft tissue enlargement of the first metatarsal head [22], thus the vertical load under the first metatarsal head will apparently diminish, while great increase of the load of the second and fifth metatarsal head occurs [23], so the first metatarsal head is no longer the main weight-bearing region in the fore-foot. Assuming 1 P and 2 P separately represent pressure under the first and second metatarsal head, Researches in foreign countries, such as the one described in [23] have studied the ratio of 2 P and 1 P in normal conditions, but considering that racial differences lead to significant different plantar pressure [24], we use a Chinese study as reference, it indicates that in normal conditions, when walking, the typical value of 1 2 P / P is 1.31 [25].…”

Section: B Hallux Valgusmentioning

confidence: 99%

“…Assuming 1 P and 2 P separately represent pressure under the first and second metatarsal head, Researches in foreign countries, such as the one described in [23] have studied the ratio of 2 P and 1 P in normal conditions, but considering that racial differences lead to significant different plantar pressure [24], we use a Chinese study as reference, it indicates that in normal conditions, when walking, the typical value of 1 2 P / P is 1.31 [25].…”

Section: B Hallux Valgusmentioning

confidence: 99%

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A novel platform system for gait analysis

Zhou

Sun

2008

2008 Conference on Human System Interactions

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A novel platform system for gait analysis was developed, with its two main parts: force platform and pressure platform, it can offer complete components of pressures in walking, including vertical pressure, shear forces, pressure distribution and COP (centre of pressure) with reliable result. System configuration was introduced as an important part, and gait model was established. Some examples of application were also reported.

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Section: B Hallux Valgusmentioning

confidence: 99%

Section: B Hallux Valgusmentioning

confidence: 99%

A novel platform system for gait analysis

Zhou

Sun

2008

2008 Conference on Human System Interactions

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show abstract

“…The images were recorded using still or cine photography (48 frames per second). Some images were digitized and used to produce what were possibly the earliest computer-generated graphic displays [16] of foot pressure, although the process had to be [61] Ring completed manually and proved too laborious to be suitable for clinical use. Static calibration by step loading [10] produced a nonlinear curve with a greater sensitivity to lower loads and dynamic calibration was undertaken by applying a load via a damped pendulum [14].…”

Section: 32mentioning

confidence: 99%

Plantar pressure-measurement sensors

Urry

1999

Meas. Sci. Technol.

139

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The sole of the foot acts as the interface between the ground and the body and is subjected to changing patterns of stress. These stresses will be accompanied by temporary or permanent strains within the tissues and may therefore be linked with those foot conditions which involve some degree of structural failure. One method of investigating the stresses is to measure the pressure distribution at the sole; an apparently simple task that continues to test scientific ingenuity and technological progress. Recent attempts to quantify shear stresses show that this extra goal may be even more challenging. Previous reviews describe the technology but not the relationship between the sensor characteristics and the associated data. The apparent lack of understanding of this relationship is reflected in some published reports and has meant that clinical findings can be misinterpreted. This report reviews those sensor characteristics that have been recorded in the literature. It also shows how the sensor design influences the data and explains why a realistic appreciation of clinical findings requires a preliminary understanding of the chosen sensor.

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The influence of mediolateral deformity, tibial torsion, and foot position on femorotibial load

Lindgren

Seireg

1989

Arch Orthop Trauma Surg

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The influence of mediolateral deformity, tibial torsion, and different centers of foot support was studied with a three-dimensional computer model that incorporates the significant muscles of the lower extremities needed for quasi-static walking. This theoretical method avoids the variability in gait pattern from the pain and discomfort associated with deformity in patients. The study illustrates the possible importance of the muscle force on the load across the knee and ankle. High strains in the medial gastrocnemius and the medial hamstring created particularly high loads in the medial compartment of the knee. Internal torsion and varus deformity were associated with the highest loads in the medial compartment of the knee, although the peak load for each deformity occurred in different phases of the gait cycle. Both external torsion and valgus deformity generally decreased the load in the medial compartment, but early in the gait cycle external torsion increased the loads on the medial side. In addition, when the center of support of the body was in the forefoot, the loads through the knee were lower than when foot support was at the heel. As expected, if the center of support was on the lateral foot line, the lateral compartment was subjected to more load and, conversely, when the center of support was on the medial part of the foot the medial compartment of the knee was more loaded. Although the predicted forces agree well with those found with other methods, we think that the model is best used to measure the direction of influence of specific factors.

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Pressure Distribution under the Foot during Static Activities

Cited by 14 publications

References 10 publications

A novel platform system for gait analysis

A novel platform system for gait analysis

Plantar pressure-measurement sensors

The influence of mediolateral deformity, tibial torsion, and foot position on femorotibial load

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