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 38 for “"Plantarflexion"”.
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Design of an Ankle Exoskeleton Employing Dual Action Plantarflexion Assistance and Gait Progression Detection
… ankle exoskeleton prototype supporting ankle plantarflexion during gait was developed under a design approach that seeks to optimize actuator performance. The actuation system featured in this prototype consists of a custom dual-action linear actuator that can provide mechanical assistance to …
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Determining muscle-tendon characteristics and function of stretch-shortening cycle performance in dancers
… achieve stylistic “pointing” of the toes – hyper-plantarflexion. Little research has delineated the MTU properties surrounding the ankle-joint of dancers and how they might influence dance-specific SSC performance, like saut de chat leaping. Furthermore, ankle-specific strength and conditioning …
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Sagittal plane characterization of normal human ankle function across a range of walking gait speeds
… controlled dorsitlexion, and powered plantarflexion. Ankle function during controlled plantarflexion is characterized by a linear, torsional spring. The work done by the spring increases with gait speed, and while gait speed is constant, the work is kept constant by modulating the …
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Ganganalyse des oberen Sprunggelenks rheumaerkrankter Kinder mittels mobiler Videoaufnahme
… affektiertem oberen Sprunggelenk in der Plantarflexion geringere Winkelwerte in der Plantarflexion, dagegen höhere Winkelwerte in der Dorsalextension aufweisen als Patienten ohne Sprunggelenksbeteiligung. Viele Faktoren wie unter anderem morphologische und strukturelle Veränderungen des …
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The Role of Voluntary Descending Control in Enhancing Motor Function Via Transcutaneous Spinal Cord Stimulation
… recorded during isometric dorsiflexion and plantarflexion tasks using varying levels of torque were analyzed. The peak-to-peak muscle responses at the motor threshold amplitude at rest were examined to compare the muscle responses during different levels of voluntary pre-activation.</p> …
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Development and Application of a BioRobotic Simulation of Stance Phase Gait to Study Foot and Ankle Kinematics
… over 10 degrees dorsiflexion and 20 degrees plantarflexion. Platform axes were controlled within 2µm and 0.008 degrees resulting in ATL measurements within ±2N of target conditions. Mean ATLs and IAR values were not significantly different between cycles of motion, but IAR values were between …
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Impact of wearing a robotic exoskeleton on gait parameters and muscle activity in individuals with incomplete spinal cord injury
… knee flexion-extension and ankle dorsiflexion-plantarflexion, and muscle activity of the lower extremities. Each participant performed walking under two conditions: with and without wearing the EKSO. RESULTS: There were significant differences between the two conditions in gait speed (p = …
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Study of mechanical characteristics of ankle-foot orthoses using finite element analysis method
… and moment of 23.9 Nm and 2.7° during plantarflexion and above which, non-linear behaviour is seen. FEA showed asymmetry in buckling displacements at the malleoli in medial and lateral surfaces of the AFO, where the lateral surface was found to be stiffer compared to the medial. …
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Morphology of the Ankle Collateral Ligaments: Functional and Clinical Considerations
… malleolar line of the talus. The ATFL limits plantarflexion, inversion and talar adduction, and internal rotation. The calcaneofibular ligament (CFL) originated 7.63 mm from the lateral malleolar tip and passed to the calcaneal lateral surface to insert 17.7 mm commonly posterosuperior to the …
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Ankle Kinetics During Landing Tasks in Participants with Chronic Ankle Instability and Uninjured Controls
… the two groups for ankle net joint moments (plantarflexion/dorsiflexion, inversion/eversion, internal/external rotation) and ankle net joint forces (axial, anterior/posterior, medial/lateral) at any time point from ground contact to 150 ms after. We conclude that those with CAI do not suffer …
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Ankle mechanical impedance under muscle fatigue
… mechanical impedance decreases in both the dorsi-plantarflexion and inversion-eversion directions under tibialis muscle fatigue. However, the effect of triceps surae on ankle mechanical impedance is uncertain since the current experimental protocol could not effectively induce fatigue in triceps …
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Biomechanical Analyses of Head Acceleration during Contact Sports and Ankle Joint Complex Injury
… The ankle was moved from full dorsiflexion to plantarflexion using a stepper motor attached to Achilles tendon. The effect of muscle configuration (Weak TA and Weak EDL) and injuries (ΔATFL and ΔATFL-CFL) compared to baseline (intact ankle with physiological load set) on the measured ankle …
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Design and analysis of diagnostic machines utilizing compliant mechanisms
… of the two modes of ankle joint rotation (plantarflexion/dorsiflexion and inversion/eversion) are dependent on a subject's own development.
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Design and control of a Two-Degree-of-Freedom powered ankle-foot prosthesis
… that can have active control on not only plantarflexion and dorsiflexion but also eversion and inversion. The objective of this thesis is to design and evaluate a two-degree-of-freedom powered ankle-foot prosthesis that is untethered and can support an average size human for level-ground …
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Effects of Increased Shoe Collar Height and Limb Dominance on Landing Knee Biomechanics in Collegiate Volleyball Players
… a shoe effect for peak dorsiflexion angle, peak plantarflexion moment, and peak medial GRF. A limb effect was found for peak knee abduction moment. The MC shoes did not increase knee frontal plane loading, but greater knee abduction moments were observed in the dominant limb. This suggests …
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Outcomes of Selective Percutaneous Myofascial Lengthening Surgery (SPML) In Children with Lower Extremity Spasticity
… pre and post-operative comparisons, except for plantarflexion at toe-off. There was no difference in gait speed. FMS ratings improved by 1 level at 5 m, 50 m, and 500 m distances. The results of this study indicate that the SPML surgery, can positively affect dynamic ROM of the knee and ankle …
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The Effects of Massage on Mood State, Range of Motion, Sports Performance, and Perceived Performance
… extension, knee flexion and extension, and ankle plantarflexion and dorsiflexion, as well as sports performance testing of vertical jump, and perceived performance rating on a scale from 1 to 10. A five minute, 100 watt, bike warm-up was completed before a 130-foot contact plyometric workout …
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The Effects of Massage on Mood State, Range of Motion, Sports Performance, and Perceived Performance
… extension, knee flexion and extension, and ankle plantarflexion and dorsiflexion, as well as sports performance testing of vertical jump, and perceived performance rating on a scale from 1 to 10. A five minute, 100 watt, bike warm-up was completed before a 130-foot contact plyometric workout …
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A Kinematic Comparison Of Shoulder And Elbow Dynamics Influenced By The Shoe-Surface Interface In Youth And Adolescent Baseball Pitchers
… elbow relative to flat ground. Stride leg ankle plantarflexion (pf) exhibited significant differences across surface and footwear. The ts shoa greater pf position relative to the mc. These results are consistent in the ankle stabilization muscles (g & ta) showing significantly greater muscle …
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