Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Ankle stiffness"”.
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On the control of paraplegic standing using functional electrical stimulation
… to ease the task of stabilising the body. Ankle stiffness control has been proposed in the literature to accomplish this task. Hitherto, ankle stiffness was provided by artificial actuators. In the second part we investigated the feasibility and limitations of ankle stiffness control by …
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Design and testing of a flexible exoskeleton-to-shoe interface
… After the interface was designed and built, the stiffness of the interface was measured and compared to the stiffness of the original rigid attachment. The stiffness was calculated using exoskeleton torque and the corresponding angle of attachment. Torque was calculated based on force applied by …
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Development and validation of a novel framework for designing and optimizing passive prosthetic feet using lower leg trajectory
… An experimental prosthetic foot with variable ankle stiffness was built based on one of these analytical models and tested by a subject with unilateral transtibial amputation in a gait lab under five different ankle stiffness conditions. Across five prosthetic-side steps with each of the five …
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Evaluation of postural stability using sensory organization test
… PSI and ES between the average sway angle, the ankle stiffness, and the SF-36 summary scores. Another aim was to investigate a method of validating mathematical models of the postural system, with the help of Ascension's Flock of Birds (FOB). This was done by testing the position output of the …
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Lower limb response to modified ankle impedance in gait
… exoskeletal robot to increase and decrease the stiffness of the ankle joint during treadmill walking to measure the effect of ankle impedance on lower limb joint kinematics. By quantifying the effect of ankle impedance on the knee joint we sought to better understand coordination and control of …
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An Attempt to Improve Stance Mechanics of Trans-Tibial Amputee Gait by the Design of a Modular Ankle Joint Prosthetic
… poor gait parameters when walking with low-cost ankle-foot prosthetics (here referred to as baseline AFP’s). This has drastic implications for the amputee populations in the developing world specifically, as they have limited access to advanced prosthetic technologies. Low-cost AFP’s are unable …
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Developing and Evaluating New Methods for Assessing Postural Control and Dynamics
… to better understand the effects of localized ankle muscle fatigue, gender, and aging on postural coordination and control. First, two methods were used to evaluate postural coordination. A wavelet coherence approach was developed and applied to assess the level and pattern of coordination …
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Effects of Running Speed, Fatigue, and Bracing on Motor Control of Chronically Unstable Ankles
Ankle sprains are among the most common injuries for participants in running and jumping sports. Following an initial sprain injury, many (30-40%) will develop chronic ankle instability (CAI), characterized by a perception of instability and repeated sprain injuries. Quasi-static test methods …
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Adaptive gait strategies of healthy individuals walking with a novel bi-linear stiffness ankle-foot orthosis
Ankle-foot orthoses are a category of biomechanical assistive devices intended to address a variety of gait impairments by providing support and stability about the ankle joint. Passive-dynamic AFOs (PD-AFOs) are broadly designed with a foot plate, a cuff that wraps around the shank, and a strut …
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Trail runners: Neuromuscular and biomechanical insights
… the SLS task, trail runners exhibited less ankle varus and less ankle external rotation at peak knee flexion in comparison to road runners. These findings suggest that trail runners’ performance in the SLS test may represent a kinematic adaptation to habitual terrain targeted at minimising …