Search for dissertations about: "BOLD"
Showing result 16 - 20 of 42 swedish dissertations containing the word BOLD.
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16. MRI at 3 T of brain functions and fibre tracts adjacent to intracranial tumors
Abstract : The aims of the studies were: to evaluate the spatial resolution of fMRI at 3 T by studying fingersomatotopy in area 3 b of the primary sensory area (Paper 1); to investigate the potential of fMRI at 3T as a clinical tool for preoperative evaluation of patients with intracranial tumors (Paper 2); to investigate the effect of glioma resection on the spatial extent of fMRI activation as compared to the normal within-subject variability (Paper 3); to determine whether the apparent diffusion coefficient (ADC) and fractional anisotropy (FA) can distinguish tumor-infiltrated edema of gliomas from pure edema of meningiomas and metastases (Paper 4). Results: Strict somatotopic organisation in the primary sensory cortex was shown in the group average; at the subject level the thumb was located laterally, anteriorly and inferiorly to the little finger in 94 % of subjects (Paper 1). READ MORE
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17. Risk assessment and contest behaviour in the Cichlid fish Nannacara anomala
Abstract : The risk of predation is an important factor for our understanding of animal behaviour in general. This thesis investigates the influence of predation risk on fighting behaviour in the cichlid fish Nannacara anomala. READ MORE
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18. Downstream migration of salmonids in regulated rivers : Non-conventional methods for fish diversion
Abstract : Passages through hydropower plants can be fatal for downstream migrating salmonids (Salmo spp.). This is particularly true for large adults that are returning to the ocean after spawning. READ MORE
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19. Causes and consequences of individual variation in anti-predator traits
Abstract : Predation imposes a potent evolutionary force on prey, moulding the evolution of traits and diversification of species, and can furthermore have powerful ecological consequences. We know that different species vary in how they cope with their natural enemies, and, consequently, a huge range of anti-predator defences are displayed in nature. READ MORE
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20. Functional neurobiology in normal aging, mild cognitive impairment and Alzheimer's disease : focus on on visuospatial processing using functional magnetic resonance imaging
Abstract : With the proportional increase of the aging population in the coming decades as well as a continuously augmenting life expectancy, the effects of neurodegeneration on brain function are a topic of increasing importance. Of special interest are tools that probe the functional consequences of neurodegenerative processes and possible compensatory mechanisms that might emerge. READ MORE