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 20 of 88 for “"Ankle joint"”.
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Simulating control of the ankle joint
… this need. Models and simulations of the human ankle were created in PyODE. This program is useful for creating simple models where the programmer desires a high level of control over model parameters. Simulations of the ankle kicking a ball and taking a step were created to examine the effect …
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Kinematics at the ankle joint complex in rheumatoid arthritis
… the three-dimensional kinematics at the ankle joint complex in rheumatoid arthritis. Previous studies have identified the rearfoot as a common site for inflammatory activity in rheumatoid arthritis resulting in painful and disabling deformity for which there are no proven interventions. A …
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Biomechanical Analyses of Head Acceleration during Contact Sports and Ankle Joint Complex Injury
… in bodily injuries, such as concussions and ankle sprains. This research is divided into two separate biomechanical studies: the design and evaluation of a device to simulate football helmet collisions and its parameters, and a cadaveric study to investigate the effects of ankle sprains. An …
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Comparative Digital Examination of the Talocrural (ankle) Joint Provides Insight into Human bipedal locomotion
… a prominent topic of discussion. The talocrural joint, a major weight-bearing ankle joint, is a feature of this discussion since all animals, including humans and our ancestors, have different functional requirements depending on locomotor modality. These requirements, featuring flexion and …
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In-vivo cartilage contact biomechanics : an experimental and computational investigation of human ankle joint complex
… to investigate the in-vivo biomechanics of human ankle joint complex in this work. The in-vivo kinematic data showed that the talocrural joint contributes more in dorsi/plantarflexion, while the subtalar joint is more responsible for inversion/eversion and internal/external rotation of the joint. …
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Effects of Lumbar Extensor Fatigue on Ankle Joint Motion Sense and Prolonged Effect on Postural Sway
… in postural sway associated with LEF. The ankle plays a major role in upright standing and degradations in proprioception could contribute to increases in sway, thus the effect of LEF on ankle proprioception was studied. Additionally, the effect of circumferential ankle pressure (CAP) on …
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Imaging displacement and strain in the medial gastrocnemius muscle during ankle-joint motion using 2D-ciné DENSE MRI
Skeletal muscle structure has been defined on both macro and microscopic levels by gross dissection, light- and electron-microscopy. The basic physiological building blocks involve the electromechanical coupling between interlinking actin and myosin fibres. Detailed intramuscular behaviour during …
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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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Evaluation of Circumferential Ankle Pressure as an Ergonomic Intervention to Maintain Balance Perturbed by Localized Muscular Fatigue of the Ankle Joint
… specifically the effects of circumferential ankle pressure (CAP) and induced ankle fatigue on postural control. Fourteen young participants (seven males and seven females) performed fatiguing sub-maximal isotonic plantar flexion exercises on an isokinetic dynamometer, in the absence and …
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Comparison of a Dynamic Ankle Orthosis to a Walking Boot for Preserving Ankle Joint Motion and Reducing Tibial Bone Load and Strain
… a walking boot for 3 – 12 weeks, which limits ankle motion and causes lower limb muscle atrophy. A Dynamic Ankle Orthosis (DAO) provided a distractive force that offloaded the ankle and retained sagittal ankle excursion during walking. It remains unclear how tibial loading is affected by a …
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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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The effect of talo-crural joint manipulation on range of motion at the ankle joint in subjects with a history of ankle injury
… research available on the effects of peripheral joint manipulation. Only a few studies have examined the effect of manipulation on ankle range of motion, with conflicting results. This study aimed to determine whether a single high-velocity, low amplitude (HVLA) thrust manipulation to the …
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Exploiting the concept of hysteresis in ankle dysfunction and ankle strengthening
The ankle joint is an important part of the body which is responsible for normal gait cycle. Dorsiflexion, plantar flexion, inversion and eversion are four types of movements controlled by the ankle joint. All these movements are controlled by the ligaments and the muscles associated with the …
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Design and analysis of diagnostic machines utilizing compliant mechanisms
In this paper, the design and testing of an ankle rehabilitation device is presented. The purpose of the research done is to provide physicians with a diagnostics tool that can quantitatively measure the severity of an injury by measuring the ankle joint's functional output. Torque and power output …
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Spatial mechanisms for modelling the human ankle passive motion
… surfaces guide passive motion at the human ankle joint complex is fundamental for the design of relevant surgical treatments. The dissertation presents a possible improvement of this knowledge by a new kinematic model of the tibiotalar articulation. In this dissertation two one-DOF spatial …
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Design and control of an active ankle-foot orthosis
Active ankle-foot orthoses (AAFOs) assist a user unable to dorsiflex the ankle joint. The optimal AAFO is lightweight and aids the user in achieving a nominal gait. This thesis presents the design and control of a novel discrete nonlinear series elastic actuator for AAFOs. The actuator uses …
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Determining muscle-tendon characteristics and function of stretch-shortening cycle performance in dancers
… distal shifts in torque from the hips to the ankle, likely due to postural maintenance. Thus, the role of the ankle in dance is potentially twofold as the primary joint: to both generate torque during dance-specific SSC’s and to achieve stylistic “pointing” of the toes – hyper-plantarflexion. …
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