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 20 of 80 for “"Gray Matter"”.
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Black Skies and Gray Matter
Black Skies and Gray Matter is a collection of stories thematically centered on characters that are lonely or lost in the world. These stories explore the characters' personalities through their interactions with others (strangers, family, friends, and spouses) and the difficulties they face being …
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Gray matter covariance networks in the mouse brain
The presence of networks of correlation between gray matter volumes of brain regions - as measured across subjects in a group of individuals - has been consistently described in several human studies, an approach termed structural covariance MRI (scMRI). Complementary to prevalent brain …
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MRI for gray matter: statistical modelling for in-vivo application and histological validation of dMRI
Gray matter (GM) forms the ‘computational engine’ of our brain and plays the key role in brain function. Measures derived from MRI (e.g., structural MRI (sMRI) and diffusion MRI (dMRI)) provide a unique opportunity to non-invasively study GM structure in-vivo and thus can be used to probe GM …
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Differential Proteomic Investigations Of Normal Appearing Gray Matter In Multiple Sclerosis And Control Post-Mortem Brain Tissue.
Mitochondrial dysfunction has been proposed to play a role in the neuropathology of multiple sclerosis (MS). To more thoroughly and efficiently elucidate potential alterations in the expression of mitochondrial and related proteins, The mitochondrial proteome in motor and parietal cortex has been …
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Optimism and the brain: trait optimism mediates the protective role of orbitofrontal cortex gray matter volume against anxiety
… resonance imaging. Results showed that OFC gray matter volume in the left hemisphere was positively correlated with optimism, which in turn was negatively correlated with anxiety. The volume of OFC was found to be negatively correlated with anxiety as well. Furthermore, trait optimism …
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Surface friction and bulk properties of cortical gray and white matter in LE/Blu Gill rats
… scope of this study encompasses the white and gray matter found in the cortex area of the brain. Tests including indentation and sliding are used to quantify the stiffness and friction response on fixed and unfixed samples. In order to apply the needed loads and retrieve data with precision, a …
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Visual Perception in Children with Spina Bifida Myelomeningocele and the Impact of Posterior Cortical Changes
… performance to indices of cortical thickness, gray matter volume, and white matter volume for a subset of these participants. Results revealed weaknesses for children with SBM on both the categorical and coordinate visual perception tasks relative to controls, though both groups were more …
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Intraindividual Variability as a Correlate of White Matter Decline
… increase in IIV has been associated with white matter volumes and microstructure. However, the association between IIV and white matter has not been contextualized with other aspects of cognitive performance and neuroanatomical structure, in particular with median reaction time and estimates of …
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Histological and Functional Characterization of Cervical Spinal Cord Injury After Graded Contusion
… size by fibronectin-immunoreactivity (IR) and gray matter loss by MAP2-IR. There was a significant correlation between lesion size and gray matter loss and injury severity. Correlations between histology and behavior outcomes showed a significant correlation between the percentage of missteps …
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Neurobiological aspects of social anxiety disorder
… SAD using a cortical thickness and subcortical gray matter volume analysis.
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Higher Brain Neurons Succumb to Acute Stroke-Like Insult While Lower Brain Neurons Strongly Resist
… front that drains residual energy in compromised gray matter. The extent of AD reliably determines ensuing damage in higher brain, but using whole-cell recordings we found that all CNS neurons do not generate a robust AD. Higher neurons generate strong AD and show no functional recovery in …
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Functionally relevant basal ganglia subdivisions in first-episode schizophrenia
… divisions, dorsal-ventral divisions, and gray-white matter segmentation. The hypothesis for the present study was that basal ganglia sub-regions forming functionally relevant subdivisions might be different in schizophrenia. Magnetic resonance imaging scans were acquired from 25 …
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Cortical Recruitment in Multiple Sclerosis: An fMRI Investigation of Individual Differences
… with MS show significant global and regional gray matter atrophy, along with a reduction in fractional anisotropy values in anterior and posterior white matter tracts. Higher levels of aerobic fitness were associated with preserved gray matter and higher FA values in a number of cortical …
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Optical dosimetry tools and Monte Carlo based methods for applications in image guided optical therapy in the brain
… phantoms consisting of skull bone, white and gray matter with differing laser beam properties, including flat, Gaussian, and super-Gaussian profiles that are converging, parallel, or diverging. From these simulations, the local photon fluence and tissue dosimetric distribution was simulated …
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Physical Activity and Brain Health in Older Latino Adults: Is There a Moderating Role of Acculturation
… activity and brain structure, specifically total gray matter and white matter volumes in older Latino adults without dementia. Using cross-sectional data from 55 participants in the RADC Latino Core study, MRI results showed that social-based acculturation significantly influenced the association …
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Population-wise consistent segmentation of diffusion weighted magnetic resonance images
… atlas of fiber-bundles as well as deep gray matter structures from a population of diffusion tensor MR images (DT-MRI). We refer to this algorithm as "Consistency Clustering" since the outputs of the algorithm include population-wise consistent segmentations and correspondence between …
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Effects of Music on the Pain Response in the Central Nervous System Using Functional Magnetic Resonance Imaging
… ventromedial medulla (RVM), and the dorsal gray matter of the spinal cord. The data suggest that music seems to engage mesolimbic and mesocortical brain regions to activate the descending pain modulation pathway. Lower subjective pain ratings corresponded to a greater suppression in the …
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The involvement of free radicals in the casual mechanism of Motor Neurone Disease
… was approximately 10-fold higher in the white matter of the spinal cord compared to that in the gray matter, whilst CAT activity was approximately 100-fold higher than GSHPX and equally distributed between the white and gray matter of the spinal cord. The activity of CAT within the central …
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Measuring Brain Iron In Healthy Controls And Accessing Venous Abnormalities In Parkinson's Disease Using Mri
… value and ∆R2^* as a function of age in seven gray matter nuclei. We also studied how the high iron region in the structures change over time, which is a more sensitive way to study the brain iron deposition. Quantitative susceptibility mapping (QSM) is another approch we used to study normal …
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Sex-Differences in Early-Onset Alzheimer's Disease
… linear regressions generated statistical maps of gray matter density, amyloid, and tau PET burden. Chapter 3 analyses evaluated the impact of sex and APOE ε4 on plasma and cerebrospinal fluid (CSF) AD biomarkers. We included 201 EOAD, 64 EOnonAD, and 86 CN participants with plasma data; of these, …
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