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 515 for “"Flexion"”.
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EMG control of prosthetic ankle plantar flexion
… initiate or control the amount of ankle angle deflexion for a more normative stair descent gait pattern. This paper presents a hybrid controller that adds myoelectric control functionality to an existing intrinsic controller. The system employs input from both mechanical sensors on the ankle as …
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Prolonged Lumbar Flexion Disturbs Paraspinal Reflex Behavior
The neuromuscular response to prolonged lumbar flexion has recently been extensively studied in felines but has not been examined in humans. Animal studies suggest that prolonged lumbar flexion disturbs neuromuscular control of paraspinal muscles. This disturbance was linked to creep deformation of …
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Biomechanical analysis of carpal flexion and extension
… formulation of a biomechanical model of wrist flexion and extension. Such a model would predict forces and torques at specific wrist postures and be employed to reduce cumulative trauma disorders of the wrist. Sixty right-hand dominant subjects (30 male, 30 female) between 20 and 30 years of …
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Effects of isometric elbow flexion on electromyographic spike analysis
The main objective of this research was to examine the relationship between surface electromyographic (SEMG) spike activity and force. The secondary objective was to determine to what extent subcutaneous tissue impacts the high frequency component of the signal, as well as, examining the …
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The development of automated palmprint identification using major flexion creases
Palmar flexion crease matching is a method for verifying or establishing identity. New methods of palmprint identification, that complement existing identification strategies, or reduce analysis and comparison times, will benefit palmprint identification communities worldwide. To this end, this …
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Comparison of passive cervical spine flexion in children and adults
… the effects of maturation on the changes in neck flexion biomechanics, this study compared the passive cervical spine flexion of children to adults in specific age groups (6-8, 9-12, 20-29, 30-40 years). Subjects with restrained torsos and lower extremities were exposed to a 1 g inertial load in …
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Biomechanical characteristics of low back tissues during trunk flexion-extension
… and neural regulatory mechanisms of the flexion-relaxation phenomenon (FRP), observed in deep trunk flexion, was performed since it is believed these mechanisms provide insight into the causes of low back injury and pain. Three methods were used to analyze the behavior of the lumbar …
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Weak lensing flexion as a probe of galaxy cluster substructure
… method for measuring weak gravitational lensing flexion to inform mass measurements on small scales. While previously published methods for measuring flexion focus on measuring derived properties of the lensed images, such as shapelet coefficients or surface brightness moments, my method fits a …
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Inter-examiner and intra-examiner reliability of the seated flexion test
… demonstrating its reliability. The seated flexion test is a motion test that has been advocated for the detection of sacroiliac joint dysfunction and has not been examined for reliability. The aim of this study was to determine the inter- and intra-examiner reliability of the seated flexion …
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Analysis of Lumbar Spine Kinematics during Trunk Flexion and Extension Motions
The effectiveness of exercise has been increasingly studied as exercise has been popular for the improvement of physical performance and rehabilitation of lumbar spine. A variety of exercises have been used to reduce back pain or spinal degeneration. However, there are no studies to determine …
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Training distribution and the acquisition of maximal isometric elbow flexion strength
… (n=13) completed 15 maximal isometric elbow flexion strength trials in one session, while the distributed group (n=13) performed five such contractions on three successive days. After a two-week and three month rest interval, both groups returned to perfonn another five maximal isometric …
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Flexion and Extension : Studies Employing Muscles of the Shank in Amphibians
Tibialis anticus and peronaeus longus of the frog have been examined by optical and electron microscopy. Sodium and potassium concentrations of these muscles have been determined. Double myograms have been used to compare physiological and pharmacological properties of flexor and extensor and to …
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Variation in cranial base flexion and craniofacial morphology in modern humans
Cranial base flexion has been used extensively as a baseline or standard from which to interpret differences in craniofacial growth and morphology. Lateral cephalometric radiographs of 414 adults representing seven samples from around the world were compared for variation in cranial base and facial …
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High flexion kinematics and kinetics for the improvement of artificial knee joints
… especially for activities requiring deep knee flexion. The philosophy of this dissertation was that more functionally effective and optimally designed artificial knees could be created for high flexion activities, if the knee joint kinematics and joint contact forces applied during finite …
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Effect of Creatine Supplementation on Wrist Flexion Work and Power after Immobilization
… = 11; age 22 ± 4 years) subjects performed wrist flexion exercise before (PRE) and after (POST) one week of wrist/forearm cast immobilization. During the immobilization period, subjects consumed Cr (20g) or placebo PL (4% CHO flavored solution) interspersed throughout the day. On the first day of …
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Loading and recovery behavior of the human lumbar spine under static flexion
Musculoskeletal disorders account for 32 percent of work related injuries and illnesses. Extensive studies have been conducted to understand and explore the factors that affect the development of musculoskeletal disorders to provide effective control strategies. One of the most important factors …
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Experimental and Simulation Based Dynamic Assessment of Flexion and Extension Movements of Torso
… Dynamic stability and muscle forces during trunk flexion-extension movements are studied in this dissertation. Torso muscle fatigue is known to affect the neuromuscular muscle recruitment that influences spinal stability. The first part of this dissertation investigates the effect of muscle …
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The biomechanics of knees at high flexion angles before and after Total Knee Arthroplasty
… knee function in the range of zero to 120⁰ of flexion for most patients. However, many patients rarely can flex tier knees beyond 120⁰ after TKA. Limited information is available regarding the biomechanics of the knee beyond 120⁰ of flexion. Little is known about the biomechanical function of …
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