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 14 of 14 for “"Upright stance"”.
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Contribution of Modified Visual Gain to Human Balance Control During Quiet, Upright Stance
… contributes to balance control during quiet, upright stance among healthy adults. Optic flow was amplified or reduced relative to head motion while participants stood quietly on either a firm or foam surface. Overall, when there was an increased reliance placed on the visual system by standing …
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The effects of postural threat on cognitive strategies used to maintain upright stance
It is well established that postural threat modifies postural control, although little is known regarding the underlying mechanism(s) responsible. It is possible that changes in postural control under conditions of elevated postural threat result from alterations in cognitive strategies. The …
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Use of Statistical Mechanics Methods to Assess the Effects of Localized muscle fatigue on Stability during Upright Stance
… dataset was employed, in which sway during quiet stance was measured under different visual and surface compliance conditions, among both genders and different age groups, as well as before and after induction of localized muscle fatigue at the ankle, knee, torso, and shoulder. The stabilogram …
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The Effect of Optic Flow During Attention Related Tasks and Quiet Stance
… balance. Increasing visual information during upright stance leads to tighter regulation of upright stance. Cognitive related tasks and postural control share capacities and compete for cognitive resources which may cause interference on one or both tasks. There is limited work on the impact of …
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Effects of Manipulating Optic Flow Gain on Dynamic Postural Control During Continuous Support Surface Translations
… and somatosensory systems to maintain upright stance. Quiet stance assesses posture when participants are standing still, and dynamic postural control has been assessed through use of moveable support surfaces. Limited work utilizes VR-induced optic flow with continuous platform …
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Avaliação do Microsoft Kinect v2 como instrumento de medição das oscilações posturais
… v2 and a force plate, respectively, during upright stance with eyes open or close, on stable or unstable surface (Airex foam). Discriminatory ability of the instruments between conditions was evaluated using parameters from CM and CP. The Spearman correlations between parameters from …
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An experimental and simulation based approach toward understanding the effects of obesity on balance recovery from a postural perturbation
… an initial angular velocity from the natural stance, and an initial angular velocity from a prescribed position. Obese participants were unable to recover balance using an ankle strategy as well as normal-weight participants when perturbations involved an initial angular velocity. However, no …
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Validation Testing of a Synthetic Spine and Upgraded Protocol for a Biomechanical Evaluation of a Lumbar Spinal Orthosis
… DMO4 successfully offloaded the lumbar spine in upright stance through 25° of flexion and 10° of extension. DMO4 was also successful at providing unconstrained axial rotation beyond the range required for DLAs. Pilot data of a physical therapy patient with low back pain was ascertained. The …
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Development and evaluation of postural control models for lifting motions and balance control
… control. At the same time, behaviors during upright stance are commonly characterized by COP-based measures. Thus, changes in COP based measures with aging, LMF, and external loads were addressed by using the proposed models, and possible postural control mechanisms were identified by …
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Postural control in persons with multiple sclerosis: an investigation of dual task cost and physical modeling
… peripheral control processes to the control of upright stance. Multiple sclerosis is known to negatively influence both central and peripheral control processes. This work investigates how human postural control is affected in persons with multiple sclerosis (MS). The first study investigated …
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Experimental and simulation-based assessment of the human postural response to sagittal plane perturbations with localized muscle fatigue and aging
… center of pressure (COP)-based measures of quiet stance. This is important because these increases have been linked to elevated risk of falls, and workers in the construction industry frequently engage in fatiguing activities while working at heights. In addition, the rate of fatality due to an …
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Developing and Evaluating New Methods for Assessing Postural Control and Dynamics
… mode controller was developed to model quiet upright stance. In contrast to most previous postural controllers, which assume continuous control, an intermittent controller was considered more consistent with recent evidence on muscle activity and the results of the first study on postural …
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Proprioception and performance in surfing
… manoeuvres while maintaining or regaining an upright stance, which may induce changes in the subcomponents of the postural control system including proprioception. Currently, proprioception is not well understood nor examined in surfers, making it difficult to quantify proprioceptive ability …
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Transition between single and multiple stepping strategies in forward fall recovery
Background. Following a balance disturbance, one or more steps are often taken. Studies have shown that older adults are more likely than young adults to take multiple steps, and that number of steps is a predictor of fall risk. In order to better understand how a stepping strategy is chosen, we …