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 “"Age related change"”.
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Influence of Overall Habitual Physical Activity on the Age-Related Change in Muscle Mass in 60 to 85 Year-Olds
… (HPA) and leisure-time activity (LTA), on the age-related change in muscle mass. A second objective was to examine the relationship between leg muscle mass and concentric/eccentric peak force production (CEPFP) of the quadriceps femoris muscle group. The final objective was to examine the …
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Numeric Memory: Developing Representations
… numbers, memory span increases dramatically from age 2 to young adulthood. The cognitive mechanisms underlying this age-related change are still somewhat uncertain. With emphasis on the Fuzzy Trace Theory (FTT) and the representational change account of numerical cognition, the present study …
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Changes to Associative Learning Processes in Later Life
… present research sought to describe and explain age related changes to associative learning processes. Eleven experiments were conducted using a human conditional learning paradigm. Background data on health, lifestyle, and cognitive ability were collected and used as predictor variables in …
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Changes In Cerebral White Matter, Vascular Risk And Cognition Across The Adult Lifespan
… imaging (DTI) to examine associations between age, diffusion and anisotropy measures of cerebral white matter (WM), and cognitive performance. However, few have examined relationships between intra-individual change in DTI measures of WM and cognitive function. It is possible that the extant …
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Predicting Vision Loss In Healthy Aging With Manganese-Enhanced Mri Of The Rat Eye
… visual function declines throughout adulthood. Age-related changes in neuronal ion homeostasis -- specifically, increased Ca2+ influx through L-type voltage gated calcium channels (L-VGCCs) -- are believed to contribute to certain functional declines, but this possibility has not yet been tested …
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Emotional Intelligence at Mid Life: A Cross Sectional Investigation of Structural Variance, Social Correlates, and Relationship to Established Personality and Ability Taxonomies
… environments and experiences increases with age, one might expect greater individual differences in EI. Similarly, if EI is located somewhere at the intersection of personality and intelligence, as some have speculated, it may follow a course of structural differentiation similar to cognitive …
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Quantifiable MRI changes in cerebral white matter and their importance to aging, cognition, and Alzheimer's disease
… has accumulated that is suggestive of a vascular-related pathway in AD. A deeper understanding of this phenomenon is critical in advancing our understanding of the AD biological process as well and may lead to the discovery of novel therapeutic targets. A common age-related change in the brain is …
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The development of social and executive functions in late adolescence and early adulthood
… (Magar, Phillips & Hosie, 2010) or broad age ranges in adulthood (Dziobek et al., 2006). This thesis reports executive function, social cognition, IQ and mood state data in a sequential design with 98 participants aged 17 (Younger group), 18 (Middle group) and 19 years (Older group) at …
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The Roles of Age, Glomerular Location, and Collagen Expression in the Canine Kidney: Analysis of a Lifespan Study
… and therefore renal dysfunction, increases with age in many species of mammals. Such alterations in renal structure and function may significantly affect long-term toxicology studies. The purpose of this study was to assess the temporal evolution of glomerulosclerosis, an important renal lesion, …
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Bone Density Measurement via Radiographic Calibration
… volume (<em>p</em> < 0.001) and negatively correlated with age (<em>r</em><sup>2</sup> = 0.28, <em>p</em> < 0.05) as determined from 544 radiographs of the distal phalanx from the left and right front feet. Therefore, veterinarians should be aware of the age related change in the solar, concave …
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Cognition in healthy aging and Parkinson's disease : structural and functional integrity of neural circuits
… anatomy and physiology and how these neural changes relate to measures of cognition and perception. While healthy aging and PD are both accompanied by a wide-range of cognitive impairments, the neural underpinnings of cognitive decline in each is likely mediated by deterioration of different …
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Cognitive flexibility and fronto-parietal control dynamics in aging
… processes, especially as they decline with age? The research program detailed here sheds light on these questions by employing integrative paradigms to investigate brain dynamics related to successful performance in attention or control-demanding situations. These control-demanding processes …
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Aging and Sympathetic Neurotransmission in Two Strains of Rats that Differ in Longevity and Immune Profiles
<p>Age-related changes in sympathetic neurotransmission in immune organs may be associated with immunosenescence; however no causal relationship has been established. From previous studies in Fischer rats (F344), we have found that during middle age, sympathetic nerve activity (SNA) rises in the …