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 21 for “"Multimodal Neuroimaging"”.
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Data-driven analysis for multimodal neuroimaging
… und fMRT Signalen zwingend erforderlich. Diese multimodalen Simultanmessungen sind inzwischen technisch möglich. Jedoch fehlen geeignete Analysemethoden. Gängige Verfahren basieren auf vereinfachenden Annahmen über die neurovaskuäre Kopplungsdynamik. Diese Annahmen sind zwar praktisch, erwiesen …
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Hierarchical Bayesian Models for Multimodal Neuroimaging Data
… Due to the complex spatial structure of neuroimaging data as well as the small number of samples typically collected in neuroimaging experiments, statistical methods which try to integrate different types of neuroimaging data are paramount. Our research is focused on the development of …
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Neurovascular mechanisms of cognitive aging: A multimodal neuroimaging investigation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Statistical Methods for Extracting and Comparing Patterns in Multimodal Neuroimaging Studies
Neuroimaging data are a vital part of advancing our understanding of brain health and the etiology of neuropsychiatric disorders. But the inherent complexity and dimensionality of these data necessitate new statistical methods to produce replicable and interpretable results. In this work, we …
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Elucidating neural mechanisms of tinnitus generation and persistence: A multimodal neuroimaging investigation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Multimodal neuroimaging with simultaneous electroencephalogram and high-field functional magnetic resonance imaging
… is an important emerging tool in functional neuroimaging with the potential to reveal new mechanisms for brain function by combining the high spatial resolution of fMRI with the high temporal resolution of EEG. Applications for this technique include studies of sleep, epilepsy, and …
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Blood-Oxygen-Level-Dependent Parameter Identification using Multimodal Neuroimaging and Particle Filters
… from the BOLD signal only. The mulitmodal neuroimaging setup consisted of the information from Cerebral Blood Volume (CBV) ( VASO-Fluid-Attenuation-Inversion-Recovery (VASO-FLAIR)), and Cerebral Blood Flow (CBF) (from Arterial Spin Labelling (ASL)) in addition to the BOLD signal and the …
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Network coherence in autism spectrum disorder : a multimodal neuroimaging study of functional connectivity and spectroscopy MRI
The underlying neuropathology and effects on neuronal activity in individuals with ASD are still being elucidated; as well as their impact on intervention and treatment outcomes. Frontal, temporal, parietal and cerebellar pathways exhibit disrupted structural and functional connectivity in …
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Delineating the Neural Correlates of Visual Awareness through the Integration of Multimodal Neuroimaging and Noninvasive Electrical Neuromodulation
… of consciousness through the integration of multimodal functional neuroimaging and noninvasive electrical neuromodulation. To this extent, we utilized simultaneous EEG-fMRI imaging to investigate both the electrophysiological and hemodynamic correlates of visual awareness during binocular …
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Multimodal neuroimaging and early neurobehavioural and developmental correlates of alcohol and methamphetamine exposed infants in Cape Town
… exposure on the 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 …
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Multimodal neuroimaging signatures of early cART-treated paediatric HIV - Distinguishing perinatally HIV-infected 7-year-old children from uninfected controls
… brain alterations can be identified using neuroimaging modalities such as proton magnetic resonance spectroscopy (1H-MRS), structural magnetic resonance imaging (sMRI), diffusion tensor imaging (DTI), and functional MRI (fMRI). However, few studies have combined multiple MRI …
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THIS IS YOUR BRAIN ON DRUGS: A MULTIMODAL NEUROIMAGING AND COMPUTATIONAL INVESTIGATION INTO THE EFFECTS OF PSYCHEDELIC TRYPTAMINES AND MDMA ON HUMAN BRAIN DYNAMICS
Psychedelic and entactogenic drugs, once prohibited, are now being decriminalized at the local level and are poised to soon be regulated as medicines by the FDA. With nearly 100 pharmaceutical and biotech companies developing novel therapeutics from these compounds, it is essential to understand …
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Sex Differences in Alzheimer’s Disease Neuroimaging Biomarkers among Cognitively Normal Older Adults
… negatively compared to men. This exploratory multimodal neuroimaging study aimed to examine sex differences in cognitively normal older adults on: (1) Amyloid-β on 18F-AV-45 Florbetapir PET imaging (2) neurodegeneration via T1 weighted MRI volumetrics, (3) cerebral blood flow via ASL-MRI. We …
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Neurobiological and metabolic mechanisms of binge-eating in anorexia and bulimia nervosa
… eating, outlining the motivation for the multimodal neuroimaging protocol detailed in Chapter 2. Chapter 2 focuses on the specific methodology of this neuroimaging study, which examined the impact of acute, psychological stress on gut hormones, endocrine responses, and inhibitory control …
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Mechanisms of vascular cognitive impairment in cerebral small vessel disease and stroke
… = 77) and stroke (n = 201) cohort respectively. Multimodal neuroimaging data were acquired in both studies, including structural magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI), the latter of which quantifies white matter microstructural integrity. The PET-MRI-SVD study …
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Morphogenetic Principles of Brain Organisation in Health and Disease
Non-invasive neuroimaging methods, such as MRI, provide a window into the structure of the mammalian brain. However, despite the ubiquity of these methods, the biological interpretation of the information obtained using these tools remains elusive. In order to accurately link this macroscale data …
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Relationship of brain functional, structural and vascular patterns to cognition in ageing and dementia
… before cognitive impairment. Measurements from neuroimaging can be useful to identify the complex processes of neurodegeneration which involve structural, cerebrovascular and functional changes. In this dissertation, I investigated the following questions: 1) Can we explain the relationship …
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Motorische Gehirnaktivität beim Menschen : eine Studie mittels Stromdichterekonstruktion und funktioneller MRT
… Versuchspersonen mit einem neuen Ansatz von multimodalem Neuroimaging untersucht, wobei hochauflösendes EEG und funktionelle MRT mit dem individuellen anatomischen MR integriert wurden. Eine elektrische Quellenrekonstruktion wurde in Beziehung zur individuellen Gehirnmorphologie durchgeführt. …
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Exploring the relationship between multimodal magnetic resonance neuroimaging and cognitive outcomes in children: applying machine learning algorithms to brain MRI features to predict cognitive scores and performance categories of children living with and without HIV
… to predict cognitive abilities or deficits from neuroimaging or other methods could make it easier to identify at-risk children who may benefit the most from targeted inter-ventions. This is of relevance in low-SES populations with relatively high rates of child-hood HIV that may affect …
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