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 22 for “"functional brain imaging"”.
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Methods for functional brain imaging
Magnetic resonance imaging (MRI) has demonstrated the potential for non-invasive mapping of structure and function (fMRI) in the human brain. In this thesis, we propose a series of methodological developments towards improved fMRI of auditory processes. First, the inefficiency of standard fMRI that …
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Spatio-temporal analysis in functional brain imaging
… a new method to incorporate information from functional magnetic resonance imaging (fMRI) into the estimation algorithm.
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Quantitative functional brain imaging with Positron Emission Tomography and irreversible tracers
… alternative to standard methodologies<br/>for functional quantitative imaging with PET and irreversible tracers.
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Functional brain imaging of facial emotion processing in individuals with intellectual impairments
… intellectually able. This is particularly so in brain imaging research, largely by reason of the significant challenges of the imaging environment, with many of the challenges of having a scan corresponding with particular difficulties for the individuals; e.g. the noise of the scanner being of …
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Magnetic particle imaging for intraoperative breast cancer margin assessment and functional brain imaging
Magnetic Particle Imaging (MPI) is an emerging tracer-based imaging modality that uniquely images the nonlinear magnetization of superparamagnetic iron oxide nanoparticles (SPIOs). MPI boasts high sensitivity, zero background signal, positive contrast, fast temporal resolution, and quantitative …
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Neurobehavioral mechanisms of social cognition and emotion regulation: A behavioral and functional brain imaging approach
… socioemotional factors at multiple levels (i.e., brain function, behavior, and individual differences), in order to better understand the interplay of emotion and cognition with increased ecological validity. These issues were investigated using a multi-method approach involving functional brain …
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Applications of U-net to diffuse optical tomography data: Image reconstruction and superresolution
… (DOT) is being investigated for effective functional brain imaging. It serves as a cheaper, less bulky and safer alternative to fMRI imaging which is the current gold standard. However, due to the complicated nature of the system, analytical reconstruction approaches begin to fail. …
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Localized or diffuse: a volumetric investigation of the relation between prefrontal cortical regions and the habitual engagement of cognitive reappraisal
Despite extensive functional brain imaging research pointing to the role of the prefrontal cortex (PFC) in cognitive reappraisal, the structural correlates of habitual engagement of reappraisal are unclear. Functional brain imaging studies of reappraisal have shown broad engagement of bilateral …
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An information theoretic approach to EEG-fMRI integration
… signals from electro-encephalography (EEG) and functional magnetic resonance imaging (fMRI), acquired simultaneously from the same observer, holds great potential for the elucidation of the neurobiological underpinnings of human brain function. However, the most appropriate way in which to …
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High-density intraoperative brain monitoring during cardiac surgery.
Functional near-infrared spectroscopy (fNIRS) is a prominent technique that allows assessment of functional brain activity by measuring hemodynamic responses. Most existing functional brain imaging methods are only capable of examining cere-bral oxygenation at the frontal lobes during cardiac …
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Engineered metalloproteins as contrast sensors for molecular fMRI
Functional brain imaging technologies seek to expand our understanding of intact neural systems. Present day functional MRI (fMRI) measures the delayed hemodynamic response that is indirectly associated with neural activity. To study underlying molecular systems noninvasively but precisely, tools …
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Cerebral mechanisms of breathlessness and its relief
… mechanisms of breathlessness is lacking. Functional brain imaging studies have identified involvement of certain cortical structures but interpretations of these data are limited by various assumptions. Aim:The primary purpose of this thesis was to interrogate the validity of the …
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Brain structure and function associated with emotion-cognition interactions: A multi-method investigation
… emotional challenges are scarce. At the level of brain structure, there has not been clear consensus on what the most appropriate tools and techniques are for investigating individual differences. At the level of brain function, the link between spatial (where) and temporal (when) aspects of the …
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Temporal Dynamics of Endogenous and Stimulus-Driven Attention: Combined ECoG/fMRI Studies
… to potentially rewarding or harmful stimuli. Functional brain imaging studies have identified networks of broadly distributed brain regions that are recruited during goal-driven attention (i.e. based on internal expectations or goals) and/or stimulus-driven attention (i.e. driven by salient or …
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Time-domain diffuse correlation spectroscopy: instrument prototype, preliminary measurements, and theoretical modeling
… (NIRS) is an emerging diffuse optical imaging tool with both clinical and academic applications such as functional brain imaging, breast cancer detection, and cerebral health monitoring. Due to its non-invasiveness, high spatial and temporal resolution, and portability, it has been …
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Inhibitory mechanisms for visual learning in the human brain
… between indistinguishable targets. As the human brain is trained on this type of visual tasks, we observe changes in its function that correspond to improved performance. We use functional brain imaging, to measure learning-dependent modulations of brain activation and investigate the processes …
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The matter of mindfulness : investigations into the mechanisms of mindfulness
… of literature analysis, clinical intervention, functional brain imaging and brain-lesion methods. In Study One a total of 10 commonly proposed mechanisms of mindfulness were identified through a qualitive systematic analysis of the literature: self-regulation, exposure, cognitive flexibility, …
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MEG coherence imaging in dyslexia: Activation of working memory pathways
… the genetic, neurodevelopmental, structural, and functional brain imaging studies that are the foundations of our understanding of dyslexia and 2) investigate the pattern of activation and functional connectivity of neuronal networks critical in working memory in dyslexics by means of …
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Revealing Preferences: a neuroeconometric approach to understanding decision-making behaviour
… On a neurobiological level the results of a functional brain imaging experiment showed that the OFC represented preferences as defined by empirically obtained indifference curves. Based on the findings we reasoned that the OFC computes an economic value; that is a subjective preference for a …
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