Ground reaction force and 3D biomechanical characteristics of walking in short-leg walkers

Zhang, Songning; Clowers, Kurt; Powell, Douglas W.

doi:10.1016/j.gaitpost.2005.12.003

Cited by 38 publications

(53 citation statements)

References 16 publications

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“…Inasmuch the advancement of the disease determines the magnitudes of changes, the general characteristics of gait mechanics are disease-specific. Similar findings were reported for subjects with a shorter [38] or amputated [39] lower limb.…”

Section: Clinical Examples Of the Effects Of Force Reduction Of Selecsupporting

confidence: 87%

Inverse Dynamics and Artificial Neural Network Applications in Gait Analysis of the Disabled Subjects

Wit¹,

Czaplicki²

2008

Human Movement

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The aim of this study is to review the achievements of the mathematical modeling of muscles force contribution during walking. In order to determine the contributions of individual muscles to the net force or net muscle torque at a given joint, the external forces acting on lower extremity joints during gait ought to be identified. The solution of this problem, called in biomechanics the inverse dynamics, is now regarded as a classical method of movement modelling. In the hypothesis put forward in this paper, it is considered if the artificial neural network method could be applied to the muscle contraction prediction during gait analysis in normal and disabled subjects. Artificial neural network (ANN) is an artificial intelligence method used in mathematical modelling and its applications in diverse areas, especially in biology and medicine, are steadily progressing. The achievements and possibilities of ANN in biomechanics were presented previously by others authors. For example, Liu and Lockhart [13] attempted at creating a network capable of reproducing muscle forces during gait from EMG signals recorded in working muscles. The objective of our study was to make use of the experience gained in the construction of ANN and to apply advanced mathematical procedures to identical experimental conditions of gaint analysis.

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Section: Clinical Examples Of the Effects Of Force Reduction Of Selecsupporting

confidence: 87%

Inverse Dynamics and Artificial Neural Network Applications in Gait Analysis of the Disabled Subjects

Wit¹,

Czaplicki²

2008

Human Movement

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“…Higher peak hip flexion moments were observed when subjects were instructed to push less with their feet as they walked (Lewis et al, 2008). Increased peak knee flexion and peak extension moments were observed when walking with short-leg walking boots compared to normal shoe conditions (Zhang et al, 2006). Increased knee stiffness caused by an enhanced activity of the hamstring muscles (m. biceps femoris and m. semitendinosus) was observed when the ankle was immobilized (Gruber et al, 2006).…”

Section: Introductionmentioning

confidence: 95%

Effect of boot shaft stiffness on stability joint energy and muscular co-contraction during walking on uneven surface

Böhm

Hösl

2010

Journal of Biomechanics

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“…Both anatomical and tracking markers were used in static trials that are used to define the relationships between the anatomical and tracking markers, but the anatomical markers were removed and only the tracking markers were used during the movement trials. 36 To increase the consistency and minimize the potential errors in placing the anatomical markers for the different static trials, we marked the lateral and medial joint positions for the lower extremity joints with a marker pen. For the lateral and medial malleoli in the Element and Functional ankle brace conditions the markers were placed on the outside surface of the estimated locations on the brace supporting arms.…”

mentioning

confidence: 99%

Efficacy of an Ankle Brace With a Subtalar Locking System in Inversion Control in Dynamic Movements

Zhang¹,

Wortley²,

Chen³

et al. 2009

J Orthop Sports Phys Ther

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t he ankle joint is the most commonly injured joint during sports participation. 3,13,14,19 The most recent National Collegiate Athletic Association injury data over 16 years (1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004) showed that ankle ligamentous injuries represent the highest injury rate at 14.9% of all reported injuries in 15 sports, ranging from 2.8% of all injuries for women's ice hockey to 26.6% for men's basketball. 19 Basketball, volleyball, soccer, and lacrosse are among the sports with the highest ankle injury rate. It was reported that up to 80% t Study deSign: Controlled laboratory study.t objectiveS: To examine effectiveness of an ankle brace with a subtalar locking system in restricting ankle inversion during passive and dynamic movements.t background: Semirigid ankle braces are considered more effective in restricting ankle inversion than other types of brace, but a semirigid brace with a subtalar locking system may be even more effective.t MethodS: Nineteen healthy subjects with no history of major lower extremity injuries were included in the study. Participants performed 5 trials of an ankle inversion drop test and a lateralcutting movement without wearing a brace and while wearing either the Element (with the subtalar locking system), a Functional ankle brace, or an ASO ankle brace. A 2-way repeated-measures analysis of variance (ANOVA) was used to assess brace differences (P.05).t reSultS: All 3 braces significantly reduced total passive ankle frontal plane range of motion (ROM), with the Element ankle brace being the most effective. For the inversion drop the results showed significant reductions in peak ankle inversion angle and inversion ROM for all 3 braces compared to the no brace condition; and the peak inversion velocity was also reduced for the Element brace and the Functional brace. In the lateral-cutting movement, a small but significant reduction of the peak inversion angle in early foot contact and the peak eversion velocity at push-off were seen when wearing the Element and the Functional ankle braces compared to the no brace condition. Peak vertical ground reaction force was reduced for the Element brace compared to the ASO brace and the no brace conditions. t concluSionS: These results suggest that the tested ankle braces, especially the Element brace, provided effective restriction of ankle inversion during both passive and dynamic movements.

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Ground reaction force and 3D biomechanical characteristics of walking in short-leg walkers

Cited by 38 publications

References 16 publications

Inverse Dynamics and Artificial Neural Network Applications in Gait Analysis of the Disabled Subjects

Inverse Dynamics and Artificial Neural Network Applications in Gait Analysis of the Disabled Subjects

Effect of boot shaft stiffness on stability joint energy and muscular co-contraction during walking on uneven surface

Efficacy of an Ankle Brace With a Subtalar Locking System in Inversion Control in Dynamic Movements

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