Use of Plantar Contact Area to Predict Medial Longitudinal Arch Height During Walking

2006 ◽  
Vol 96 (6) ◽  
pp. 489-494 ◽  
Author(s):  
Thomas G. McPoil ◽  
Mark W. Cornwall
Keyword(s):  
Contact Area ◽  
Sensor Data ◽  
Medial Longitudinal Arch ◽  
Arch Height ◽  
Plantar Surface ◽  
Longitudinal Arch ◽  
Surface Contact ◽  
Surface Contact Area ◽  
Arch Index ◽  
Vertical Height

A study was conducted to determine whether plantar surface contact area measures calculated from footprints collected during walking can be used to predict the height of the medial longitudinal arch. Thirty healthy women participated in the study. Arch height was determined by the distance from the navicular tuberosity to the floor and by the “bony” arch index. Dynamic plantar surface contact area was recorded using a pressure platform as the subjects walked across a 12-m walkway. The arch index and the total plantar surface contact area were determined from the pressure sensor data. The results indicated that plantar surface contact area could be used to estimate only approximately 27% of the height of the medial longitudinal arch as determined by navicular tuberosity height and the bony arch index. These findings demonstrate the inability of the clinician to predict the vertical height of the medial longitudinal arch on the basis of the amount of foot plantar surface area in contact with the ground during walking. (J Am Podiatr Med Assoc 96(6): 489-494, 2006)

scholarly journals Can foot anthropometric measurements predict dynamic plantar surface contact area?

2009 ◽  
Vol 2 (1) ◽  
Author(s):  
Thomas G McPoil ◽  
Bill Vicenzino ◽  
Mark W Cornwall ◽  
Natalie Collins
Keyword(s):  
Contact Area ◽  
Anthropometric Measurements ◽  
Plantar Surface ◽  
Surface Contact ◽  
Surface Contact Area

Reliability and Correlation of Static and Dynamic Foot Arch Measurement in a Healthy Pediatric Population

2017 ◽  
Vol 107 (5) ◽  
pp. 419-427 ◽  
Author(s):  
Timo Scholz ◽  
Astrid Zech ◽  
Karl Wegscheider ◽  
Susanne Lezius ◽  
Klaus-Michael Braumann ◽  
...  
Keyword(s):  
Mixed Model ◽  
Dynamic Assessment ◽  
Standard Procedure ◽  
Time Of Day ◽  
Poor Correlation ◽  
Medial Longitudinal Arch ◽  
Arch Height ◽  
Longitudinal Arch ◽  
Foot Arch ◽  
Arch Index

Background: Measurement of the medial longitudinal foot arch in children is a controversial topic, as there are many different methods without a definite standard procedure. The purpose of this study was to 1) investigate intraday and interrater reliability regarding dynamic arch index and static arch height, 2) explore the correlation between both arch indices, and 3) examine the variation of the medial longitudinal arch at two different times of the day. Methods: Eighty-six children (mean ± SD age, 8.9 ± 1.9 years) participated in the study. Dynamic footprint data were captured with a pedobarographic platform. For static arch measurements, a specially constructed caliper was used to assess heel-to-toe length and dorsum height. A mixed model was established to determine reliability and variation. Results: Reliability was found to be excellent for the static arch height index in sitting (intraday, 0.90; interrater, 0.80) and standing positions (0.88 and 0.85) and for the dynamic arch index (both 1.00). There was poor correlation between static and dynamic assessment of the medial longitudinal arch (standing dynamic arch index, r = –0.138; sitting dynamic arch index, r = –0.070). Static measurements were found to be significantly influenced by the time of day (P < .001), whereas the dynamic arch index was unchanged (P = .845). This study revealed some further important findings. The static arch height index is influenced by gender (P = .004), whereas dynamic arch index is influenced by side (P = .011) and body mass index (P < .001). Conclusions: Dynamic and static foot measurements are reliable for medial longitudinal foot arch assessment in children. The variation of static arch measurements during the day has to be kept in mind. For clinical purposes, static and dynamic arch data should be interpreted separately.

scholarly journals Windlass Mechanism in Individuals With Diabetes Mellitus, Peripheral Neuropathy, and Low Medial Longitudinal Arch Height

2014 ◽  
Vol 35 (8) ◽  
pp. 816-824 ◽  
Author(s):  
Judith R. Gelber ◽  
David R. Sinacore ◽  
Michael J. Strube ◽  
Michael J. Mueller ◽  
Jeffrey E. Johnson ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Peripheral Neuropathy ◽  
Medial Longitudinal Arch ◽  
Arch Height ◽  
Longitudinal Arch

scholarly journals Does the weakening of intrinsic foot muscles cause the decrease of medial longitudinal arch height?

2017 ◽  
Vol 29 (6) ◽  
pp. 1001-1005 ◽  
Author(s):  
Kazunori Okamura ◽  
Shusaku Kanai ◽  
Sadaaki Oki ◽  
Satoshi Tanaka ◽  
Naohisa Hirata ◽  
...  
Keyword(s):  
Medial Longitudinal Arch ◽  
Arch Height ◽  
Longitudinal Arch ◽  
Intrinsic Foot Muscles

scholarly journals Strontium Oxide Deposited onto a Load-Bearable and Porous Titanium Matrix as Dynamic and High-Surface-Contact-Area Catalysis for Transesterification

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 973 ◽  
Author(s):  
Han Lee ◽  
Jiunn-Der Liao ◽  
Mu Lee ◽  
Bernard Liu ◽  
Wei-En Fu ◽  
...  
Keyword(s):  
Contact Area ◽  
Porous Matrix ◽  
Porous Titanium ◽  
Transesterification Reaction ◽  
Biodiesel Production ◽  
Strontium Oxide ◽  
Chemical Structures ◽  
Surface Contact ◽  
Surface Contact Area ◽  
Highly Porous

Strontium oxide (SrO) deposited onto a porous titanium (Ti)-based scaffold (P-Ti) is a promising and novel approach for high-throughput transesterification. Notably, a highly porous and calcinated scaffold provides a load-bearable support for a continuous process, while the calcinated SrO catalyst, as it is well distributed inside the porous matrix, can extend its surface contact area with the reactant. In this work, the formation of transesterification reaction with the conversion and production of olive oil to biodiesel inside the porous matrix is particularly examined. The as-designed SrO-coated porous titanium (Ti)-based scaffold with 55% porosity was prepared via a hydrothermal procedure, followed by a dip coating method. Mechanical tests of samples were conducted by a nanoindentator, whereas the physical and chemical structures were identified by IR and Raman Spectroscopies. The results implied that SrO catalysts can be firmly deposited onto a load-bearable, highly porous matrix and play an effective role for the transesterification reaction with the oil mass. It is promising to be employed as a load-bearable support for a continuous transesterification process, such as a process for batch or continuous biodiesel production, under an efficient heating source by a focused microwave system.

scholarly journals MORPHOMETRIC STUDY OF PLANTAR ARCH INDEX AND THE PREVALENCE OF FLATFOOT AMONG TRIBES

2020 ◽  
Vol 8 (4.1) ◽  
pp. 7782-7787
Author(s):  
Adjei-Antwi Collins ◽  
◽  
Chrissie Stansie Abaidoo ◽  
Nketsiah James ◽  
Joshua Tetteh ◽  
...  
Keyword(s):  
Prevalence Rate ◽  
The Other ◽  
Morphometric Study ◽  
Medial Longitudinal Arch ◽  
Foot Deformity ◽  
Pes Planus ◽  
Longitudinal Arch ◽  
Ethical Approval ◽  
Foot Arch ◽  
Arch Index

Flatfoot (pes planus), commonest foot deformity caused by the absence or collapse of the medial longitudinal arch. Flatfoot results in serious health problems and postural defects. It is highly variable in different populations with many factors associated. This study was conducted to find the plantar arch index and the prevalence of flatfoot and its relationship with tribes in Ghana. A total of 278 participants (172 males and 106 females) with ages ranging from 16 to 34 years were recruited for the study. Ethical approval and participants’ informed consent were sought prior to the study. Participants were drawn from the Akan, Ewe, Ga-Dangbe and other tribes (Dagomba, Dagabaa, Frafra, Gonja, Wale Wale etc). Foot imprints were taken from each participant using the ink method. The plantar arch index was calculated using the ratio of the width of the central and the heel region of the footprint. The mean right plantar arch index was higher than the left. The prevalence of flatfoot was 15.1% (6.1% unilateral left, 5.8% unilateral right and 3.2% bilateral). The prevalence rate was 15.7% in males and 14.1% in females. The prevalence rates reported for the Ga-Dangbes and Ewes were 30.8% and 23.6% respectively. On the other hand, both Akans and individuals belonging to the other tribes recorded the same prevalence rate of 13.7%. Flatfoot was found to be high among the Ga-Dangbes. Ethnicity as an external factor has a great role in influencing foot arch structure. Also, sex has an influence on the morphology of an individual’s foot. KEY WORDS: Flatfoot, Pes planus, Foot deformity, Medial Longitudinal Arch.

scholarly journals A STUDY OF FOOTPRINTS OF TREE-CLIMBING COMMUNITIES OF SOUTH INDIA

2014 ◽  
Vol 04 (04) ◽  
pp. 060-064
Author(s):  
P. Shivarama Bhat ◽  
Arunachalam Kumar
Keyword(s):  
Accidental Falls ◽  
South India ◽  
Community Study ◽  
Medial Longitudinal Arch ◽  
Arch Height ◽  
Accidental Fall ◽  
Longitudinal Arch ◽  
Morphological Adaptations ◽  
Kinetics Of

AbstractThe paper details the morphological adaptations of the foot shape and its arches to sustained professional tree climbing activity. Foot inversion, as required by climbers on a long term and regular basis reshapes the bony architecture of the foot and the medial longitudinal arch over a period of time. These changes can be observed and measured, noninvasively through study of footprints.This community study on the progressive adaptation of the arch to the rigors of climbing was recorded through footprints collected from the climbers with varied experience in the profession. The collation of observations show that the medial arch continues to shrink with sustained inversion, raising the dome of the instep.The progressive compensatory rise in arch height however, is arrested abruptly after a phase, with failure of the arch to accommodate further to more stress – leading to slipping and falls from heights. The article discusses the bio-mechanisms and kinetics of foot adaptation to the rigors of climbers and analysis the cause of accidental falls, even though most of the accidental fall victims have had a number of years of climbing experience.

Effect of Running Shoe Type on the Distribution and Magnitude of Plantar Pressures in Individuals with Low- or High-Arched Feet

2009 ◽  
Vol 99 (4) ◽  
pp. 330-338 ◽  
Author(s):  
Joseph M. Molloy ◽  
Douglas S. Christie ◽  
Deydre S. Teyhen ◽  
Nancy S. Yeykal ◽  
Bradley S. Tragord ◽  
...  
Keyword(s):  
Motion Control ◽  
Negative Correlation ◽  
Contact Area ◽  
Plantar Pressure ◽  
Arch Height ◽  
Plantar Pressures ◽  
Pressure Distributions ◽  
Test Conditions ◽  
Running Shoes ◽  
Arch Index

Background: Research addressing the effect of running shoe type on the low- or high-arched foot during gait is limited. We sought 1) to analyze mean plantar pressure and mean contact area differences between low- and high-arched feet across three test conditions, 2) to determine which regions of the foot (rearfoot, midfoot, and forefoot) contributed to potential differences in mean plantar pressure and mean contact area, and 3) to determine the association between the static arch height index and the dynamic modified arch index. Methods: Plantar pressure distributions for 75 participants (40 low arched and 35 high arched) were analyzed across three conditions (nonshod, motion control running shoes, and cushioning running shoes) during treadmill walking. Results: In the motion control and cushioning shoe conditions, mean plantar contact area increased in the midfoot (28% for low arched and 68% for high arched), whereas mean plantar pressure decreased by approximately 30% relative to the nonshod condition. There was moderate to good negative correlation between the arch height index and the modified arch index. Conclusions: Cushioning and motion control running shoes tend to increase midfoot mean plantar contact area while decreasing mean plantar pressure across the low- or high-arched foot. (J Am Podiatr Med Assoc 99(4): 330–338, 2009)

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