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.
Results
Showing 1 to 13 of 13 for “"Structural magnetic resonance imaging (MRI)"”.
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Systematic review of imaging studies in the lateral orbitofrontal circuit in bipolar type I disorder
… this study was to review the available published structural magnetic resonance imaging (MRI) data in bipolar type I disorder, looking for any evidence of a change in size of the structures in lateral orbitofrontal circuits relative to the conceptually unaffected motor circuit. Structures in the …
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Brain structure and function associated with emotion-cognition interactions: A multi-method investigation
… multi-method approach involving structural and functional brain imaging (i.e., structural magnetic resonance imaging, MRI; functional MRI; event-related optical signal, EROS; electroencephalography/event-related potential, EEG/ERP), a cognitive task involving emotion-cognition …
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Lesion identification and the effect of lesion on motor mapping after stroke
… includes longitudinal behavioral and multimodal imaging data in both stroke patients and healthy controls for two research projects. Firstly, I improved an automatic lesion segmentation method to aid in the identification of the location and extent of the stroke in structural magnetic resonance …
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Automated hippocampal location and extraction
… studied extensively and is subject to abnormal structural change in various neuropsychiatric disorders. The highest definition in vivo method of visualizing the anatomy of this structure is structural Magnetic Resonance Imaging (MRI). Gross structure can be assessed by the naked eye inspection …
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Multimodal neuroimaging and early neurobehavioural and developmental correlates of alcohol and methamphetamine exposed infants in Cape Town
… brain in infants as measured by multimodal brain imaging and the relationship of these findings to early neurobehavioral and developmental status. The specific aims the thesis addressed included leveraging structural magnetic resonance imaging (MRI), diffusion tensor imaging (DTI), proton magnetic …
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The effects of HIV-1 infection on subcortical brain structures in children receiving ART : a structural MRI study
… structures as measured on high-resolution structural Magnetic Resonance Imaging (MRI) scans traced manually. The sample comprised 79 5-year old children, 52 with HIV and 27 uninfected controls. Infected children were all stable on antiretroviral therapy (ART) and were from the Children with …
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Mechanisms of vascular cognitive impairment in cerebral small vessel disease and stroke
… barrier (BBB) permeability and white matter microstructural damage. This thesis aims to elucidate our understanding of the roles of these mechanisms in CSVD and VCI. Methods: This thesis focusses on two longitudinal studies, the ‘PET-MRI-SVD’ and ‘Rates, risks and routes to reduce vascular …
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Development of the adolescent prefrontal cortex and basolateral amygdala and the effects of puberty and alcohol exposure
Human structural magnetic resonance imaging (MRI) studies indicate that some neural regions such as the prefrontal cortex (PFC) and the amygdala continue to develop throughout adolescence into early adulthood. These studies have specifically shown that the volume of the PFC increases until puberty …
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Predicting trajectories of symptom change during and following treatment in adolescents with Unipolar Major Depression.
… on a subsample of patients: 109 of the 465 with structural magnetic resonance imaging (MRI) data. FreeSurfer was used to extract cortical thickness (CT) and surface area (SA) measures from 4 regions of interest (ROI; rostral anterior cingulate, dorsolateral prefrontal cortex, orbitofrontal …
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Structural brain imaging in individuals at high familial risk of schizophrenia
… high risk studies utilizing surface based MRI programmes provide a good method to investigate this. In the Edinburgh High Risk Study, structural magnetic resonance imaging (MRI) scans of 150 young individuals at familial high risk of schizophrenia, 34 patients with first-episode …
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Modelling the pathophysiology of schizophrenia and methamphetamine-induced psychosis: A structural magnetic resonance imaging and cytokine study
… However, no studies to date have 1) compared structural findings in SCZ and MAP, 2) investigated the associations of psychotic symptom severity and duration with brain volumes and cytokine concentrations in SCZ and MAP and 3) determined the effect of antipsychotic type on brain measures in SCZ …
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Development of human functional and structural brain networks in adolescence and its relevance to psychiatric disorders
… development. In this thesis, functional and structural magnetic resonance imaging (MRI) is used to map normative brain development, in adolescence and later life, which might differentially predispose men and women to different levels of risk for adolescent and adult mental illness. First, …
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Brain morphometry of HIV-infected children on early antiretroviral therapy (ART) from age 5 to 9 years
… 5 -13 years). The effects may be studied using structural magnetic resonance imaging (MRI) and automated segmentation software. FreeSurfer (https://surfer.nmr.mgh.harvard.edu/) is a valuable tool for investigating brain morphology but was not originally designed for segmenting pediatric brains. …