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Journal ArticleDOI

Biomechanical evaluation of human lower-extremity disability in erect standing.

01 Jan 1983-Medical & Biological Engineering & Computing (Kluwer Academic Publishers)-Vol. 21, Iss: 1, pp 91-96
TL;DR: The findings of this investigation where the experimental measurements have been analysed to recognise the static weight-bearing patterns associated with different types of lower-extremity handicapped subjects and to define an index that may be used for the assessment are reported.
Abstract: In order to develop a clinically suitable method for the assessment of lower-extremity disability during erect standing—the commonest static activity involving the human lower-extremity system—an investigation using a system made up of strain gauge load cells has been carried out. This paper reports the findings of this investigation where the experimental measurements have been analysed to recognise the static weight-bearing patterns associated with different types of lower-extremity handicapped subjects and to define an index that may be used for the assessment.
Citations
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01 Jan 2009
TL;DR: In this article, the authors compare alternative methods to compute a pressure map from collected data, and conclude that with stationary pressure distribution, both cumulative and maximum or average pressure maps should be presented.
Abstract: A variety of methods to process plantar pressure distribution data are available. The aim of this study was to compare alternative methods to compute a pressure map from collected data. Correlation coefficients between the pressure maps were used to ascertain whether the pressure maps contain the same information. The interface pressure data of twenty subjects was collected for the data analysis with commercial GAITRite walkway system. Stationary pressure distribution and pressure distributions at normal and fast walking speeds were recorded with each subject. The data was analyzed with Matlab software instead of the GAITRite software. Three alternative pressure maps (cumulative, maximum and average pressure maps) were computed from the measured data. The cumulative pressure map shows the sum of all pressure values detected with a single sensor. The maximum and average pressure maps, instead, present the maximum and mean pressure values of each sensor. The results of this study indicate that with stationary pressure distribution, both cumulative and maximum or average pressure maps should be presented. With pressure distributions measured at walking, instead, any of the three computing methods can be used.

10 citations


Cites methods from "Biomechanical evaluation of human l..."

  • ...Ganguli used the same method with their system [11]....

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Patent
30 Jan 1995
TL;DR: In this article, the crosspiece is formed in one piece for taking up and transmitting the forces exerted by the load on the platform, and the encoder may be potentiometers having their shafts in line with extensions of the cross-piece axes.
Abstract: The platform (1) is pivotable about two intersecting geometric axes equipped with pivot angle encoders (17). It is supported centrally on a universal joint (3) with a crosspiece representing the axes, which are spaced at pref. less than 5 cm from the platform. The encoders are immobilised against rotation w.r.t. the crosspiece, which is formed in one piece for taking up and transmitting the forces exerted by the load on the platform. The encoders may be potentiometers having their shafts in line with extensions of the crosspiece axes.

6 citations

Journal ArticleDOI
TL;DR: Four different gait analysis techniques (three-dimensional kinematic analysis, two force plates, dynamic electromyography (EMG), dynamic analysis of plantar pressure distribution) were employed in a study on 10 normal subjects and 12 patients after treatment of displaced calcaneal fractures for accuracy of measurement of the severity of functional impairment.

5 citations

Journal Article
TL;DR: The goal of this research is to develop and test an ultrasound-based gait tachography system to enable the doctors and physiotherapists to evaluate lower limb extremity problems.
Abstract: Gait analysis is an approach towards analysis of the structure and function of the foot, lower limb and body during walking or running. The aim of gait analysis in rehabilitation centres is much larger than only simply a functional assessment tool as it can help us determine the complex relationships between impairment, functional limitation and disability. The goal of this research is to develop and test an ultrasound-based gait tachography system to enable the doctors and physiotherapists to evaluate lower limb extremity problems. Gait tachography employ Doppler frequency shifting principle to calculate the change in velocity of body's centre of gravity during gait. The ultrasound-based gait tachography includes simple instrumentation, composed of a transmitter and a receiver block. The ultrasonic gait tachograph is cost efficient, comparatively small, lightweight, does not hamper a person's psychology much and is suitable to be used in non-laboratory situation.

3 citations

References
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Journal ArticleDOI
TL;DR: Unlike many previous trials which had negative results, in this trial the drug was given intravenously and promptly (median of 4 hours from onset of pain to injecton), thereby achieving early beta-blockade.

308 citations

Journal ArticleDOI
TL;DR: Sir Arthur Keith has given his support to one side, and the resuIts of studies which contribute to the opposing point of view are submitted.
Abstract: W ITHIN the Iast year we have been favored with a very interesting and vaIuabIe articIe from Sir Arthur Keith, entitIed “The History of the Human Foot and its Bearing on Orthopaedic Practice.“l In it he impIies the existence of two cIinica1 schooIs of thought in regard to static foot disorders; or to be more exact, he recognizes the present existence of one schoo1 as having superseded the other which is now out of date, and seems to assign to me the uncertain honor of being to his knowIedge, its singIe surviving advocate. I shaI1 not presume to use this occasion as an opportunity for arguing persona1 ideas, nor wouId I impose myseIf upon the courtesy of your esteemed society, were I not convinced that the conchrsions which I hoId are entertained by some-of you at Ieast and that their soundness is estabIished by substantia1 evidence. Keith has given his support to one side, and I appreciate this priviIege of submitting before you the resuIts of studies which contribute to the opposing point of view. AIIow me to quote directIy from his articIe.

108 citations

Journal ArticleDOI
TL;DR: A new method and instrument developed by the authors allows a simultaneous recording of the pressure distribution between each foot and the ground during either standing or walking, which may yield important data for the evaluation of prosthetic-orthotic appliances, in post-operative follow-up of orthopedic patients, and in the mechanics of rehabilitation.

97 citations

Journal ArticleDOI
TL;DR: The results show that the load carried by the normal midfoot is low and considerable variation between individuals is seen in the distribution of vertical load across the forefoot.
Abstract: 1. A method is described for measurement of the vertical load carried by different areas of the foot while walking barefoot. The results of tests on fourteen subjects, seven with some foot abnormality, are reported. 2. The results show that the load carried by the normal midfoot is low. Measurements in this area could be useful in the quantitative assessment of some foot abnormalities. 3. Considerable variation between individuals is seen in the distribution of vertical load across the forefoot. The metatarsal bones do not necessarily carry loads in proportion to their size.

96 citations