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 24 for “"Leg -- Muscles."”.
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Biomechanical Assessment and Metabolic Evaluation of Passive Lift-Assistive Exoskeletons During Repetitive Lifting Tasks
… exoskeletons on reducing the activity of back muscles and metabolic reduction. The main objective of this dissertation is to render an overview of three studies that attempt to improve the literature by providing comprehensive biomechanical evaluations and metabolic assessments of three passive …
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Quantification of eccentric load using accelerometer imbedded in GPS
… and stopping require eccentric contractions of leg muscles, potentially causing muscle damage and affecting athletic performance. Thus, it is important to monitor eccentric loading in games and training. A variable known as “eccentric index” (EI) purports to be a better representation of …
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Body dynamics and muscle activity during Chi running
… ankle, and EMG amplitude and duration from four leg muscles. Although no significant differences were found between the two conditions for any of the dependent measures, there was a visible change in running form. A larger number of participants or a different set of dependent measures may be …
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Impacts of Empagliflozin (EMPA) Treatment on Skeletal Muscle Microvasculature in Type 1 Diabetic Rats
… factors were assessed in three separate leg muscles. EMPA+insulin treated rats exhibited better glycemic control, but capillary to fibre ratio and VEGFa mRNA was not impacted by EMPA+insulin treatment in the tibialis anterior. PECAM mRNA and VEGFa protein expression was also not impacted …
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Visualizing muscular fatigue during running exercises with electromyography-derived variables.
… attempted to observe if fatigue occurred in the leg muscles, specifically both gastrocnemius muscles and the vastus lateralis, during a running trial using electromyography to record the muscle activation signals. Post-processing methods calculated four parameters to detect fatigue: mean …
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An investigation of position and force during gait-mimicking finger motions
… injured person without the ability to use their legs (paraplegia) and sometimes, without the ability to use their arms and legs (tetraplegia or quadriplegia). Currently, primitive forms of feed-forward functional electrical stimulation (FES) and special orthotics are available for persons with …
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A haptic control system for functional electrical stimulation of paraplegic legs
… stimulation (FES) is a means by which paraplegic men and women can use their natural legs for walking. In FES the impaired muscles are stimulated with electricity in a proper cycle to cause the legs to move in a walking pattern. It can be greatly beneficial for paraplegics however, current …
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Modules in the brainstem and spinal cord underlying motor behaviors
… the electromyogram (EMG) data recorded from the leg muscles during frog motor behaviors before and after neuronal transection. In my two sets of experiments, EMGs were recorded before and after transection at the level of the caudal end of the third ventricle and at the level of the caudal end of …
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The Effect of Optic Flow During Attention Related Tasks and Quiet Stance
… was also collected by placing EMG on 3 lower leg muscles during the trials. MSRS questionnaire was completed after each trial to assess movement consciousness. Root mean square (RMS), and the mean power frequency (MPF) of Centre of Pressure (COP) and head position (HeadPos) were used to …
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Oxygen Generating Materials for Tissue Restoration and Regeneration
… ischemia, creating an oxygen deficit in the leg muscles. Short-term functional and histological assessments established the effectiveness of the material in an environment with little to no vascular supply, which would normally become necrotic. This initial work provides an important proof of …
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Effects of polyphosphates on frozen chickens.
… and the ionic composition of individual muscles were determined by Inductively Coupled Plasma Atomic Emission Spectrometry (IOPAES). The hydrolysis of polyphosphates was studied using thin layer chromatography(TLC) and phosphorus-31 Fourier transform nuclear magnetic resonance ([31] …
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A model of muscle-tendon function in human walking
In order to motivate the design of legged machines that walk as humans do, this thesis investigates how leg muscles and tendons work mechanically during level-ground human walking at self-selected speeds. I hypothesize that quasi- passive, series-elastic clutch units spanning the knee joint in a …
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The role of surface condition in athletic performance
… jumps. Of note, under unstable conditions, trunk muscles seem to have a stabilizing function during exercise to facilitate the transfer of torques and angular momentum between the lower and upper extremities. The present thesis addresses the acute effects of surface instability on performance …
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Motor control strategies in response to unexpected disturbances of dynamic postural control in people with and without low back pain
… electromyography (EMG), recorded at 12 trunk muscles and 10 (study 1) respectively 5 (study 2) leg muscles. EMG latencies of muscle onset [ms] were retrieved by a semi-automatic detection method. EMG amplitudes (root mean square (RMS)) were assessed within 200 ms post perturbation, normalized …
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Biomechanical Assessment of Varied Lifting Tasks With and Without Passive Back Support Exoskeletons
… data (analyzed in a different study) from the leg muscles had relationships with torso torque while the back and stomach muscles showed no significant relationships. Exoskeleton efficacy research has a strong focus on Stoop, Squat, and Freestyle lifting. However, asymmetric styles such as One …
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Strength Relationship Between the Anterior and Posterior Compartments of the Leg
1 PDF file (60 leaves)
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Sensor Fusion based Gait Recognition for Accurate Actuation of Foot Drop Stimulation
… patients. In FES, the peroneal nerve and lower leg muscles are stimulated by electric current to promote required movement at ankle joint prior swing. A sensory mechanism is therefore employed that detects the gait and actuate stimulation at the right instance. However, the gait sensing system …
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A 3D neuromuscular model of the human ankle-foot complex based on multi-joint biplanar fluoroscopy gait analysis
… by an intricate interplay of several lower leg muscles that cannot be fully uncovered using experimental methods alone. A combination of experiments and mathematical modeling may be used to estimate aspects of neuromusculoskeletal functions that control human gait. In this research, a …
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Development of leg motor neurons in drosophila melanogaster
… while adult flies walk and fly using legs and wings. Leg motor neurons control multi-jointed leg movement by coordinately regulating leg muscle contractions. With the aim of understanding how Drosophila leg motor neurons are specified, in Chapter One, I give a general introduction of …
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