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 23 for “"MRI study"”.
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Effects of prenatal alcohol exposure on cerebellar volume in children an MRI study
… teratogenic effects of alcohol. The aim of this study was to determine whether prenatal exposure to alcohol has specific effects on the volumes of specific lobules of the cerebellum. Lobule tracing was performed manually, with Multitracer, using a refined methodology. Lobule volumes (normalized …
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A functional MRI study of the distributed neural circuitry of learning and reward
The aim of this research project was to study the neural substrates involved in processing rewarding stimuli. Evaluation of the magnitudes of reward is one of the fundamental aspects of goal directed behavior, and studies have shown that this process involves the midbrain dopamine system. Work by …
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Regional Differences in Brain Structure Underlying Childhood Stuttering Persistence and Recovery: An MRI Study
CWPS and CWRS exhibited similar structural anomalies when contrasted to CWNS in several cortical, subcortical, and cerebellar regions critical for speech motor sequencing and sensorimotor integration, such as the left inferior frontal area, bilateral temporoparietal regions, as well as several …
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NEUROANATOMICAL CORRELATES OF AUTISM SPECTRUM DISORDER AND THEIR CORRELATION WITH CLINICAL FEATURES A MULTICENTRIC MRI STUDY.
… understood ethiology .The aim of the present study was to investigate and describe the brain morphologic characteristics (surface area SA, cortical thickness CT and volume) in children and adolescents with ASD and control subjects, in order to determine neuroanatomical correlates that …
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Cognitive therapy, working memory training, and the treatment of Methamphetamine Use Disorder - a functional MRI study
… memory training to improve outcomes. The current study aims to investigate the potential impact of brief cognitive therapy and using working memory training as an adjunct in the treatment of MUD. Methods: Participants were recruited from an in-patient drug rehabilitation centre in Cape Town. The …
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Brain volumetric MRI study of extremely low gestational age newborns (ELGANs) at 9 to 10 years of age
… emotional and behavioral deficits. This study is to determine potential brain volumetric abnormalities of ELGAN children at 9 to 10 years of age. METHODS: High-resolution magnetic resonance imaging (MRI) scans were obtained from 82 ELGAN children using a dual-echo turbo spin-echo (DE-TSE) …
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The effects of HIV-1 infection on subcortical brain structures in children receiving ART : a structural MRI study
… 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 HIV early antiretroviral (CHER) cohort …
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The longitudinal effects of HIV and ART on the developing brain: a structural MRI study using manual segmentation
… gap, this thesis builds on a cross-sectional study, by the same author, of this group of 106 children who were perinatally infected with HIV (PHIV), and form part of “Children with HIV early antiretroviral”(CHER) trial who have been followed since birth (Violari et al. 2008; Laughton et al. …
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A cadaveric and magnetic resonance imaging study of the anatomical variations of levator scapulae
… scapulae muscle is to elevate the scapula. This study aimed to determine the morphometric variation in levator scapulae muscle and its related neurovasculature via cadaveric and MRI studies. There were 20 available cadavers, and their posterior and anterior neck triangles were dissected to expose …
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MOLECULAR DISSECTION OF CARDIOMYOPATHY
… in Singapore and China respectively. In cardiac MRI study, genotype-positive HCM patients had more fibrosis but smaller indexed left ventricular mass. While in DCM, 10.7% Singapore cases carried TTN truncating variants and another 10% carried pathogenic HCM variants suggesting burnt-out HCM. …
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Visual Enumeration and Estimation: Brain mechanisms, Attentional demands and Number representations.
… and enumeration in an in-depth single case study of a patient with simultagnosia. Subsequently I demonstrated that, in visual enumeration, subitizing and counting are dissociable processes and they rely on different brain structures. This was done through a neuropsychological single case …
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Improved Techniques For Acquisition and Analysis of Dynamic Contrast-Enhanced Magnetic Resonance Imaging For Detecting Vascular Permeability In The Central Nervous System
… magnetic resonance imaging (DCE-MRI) is a noninvasive technique for quantitative assessment of the integrity of blood-brain barrier and blood-spinal cord barrier (BSCB) in the presence of central nervous system pathologies. However, the results of DCE-MRI show substantial …
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A Machine Learning and Computer Assisted Methodology for Diagnosing Chronic Lower Back Pain on Lumbar Spine Magnetic Resonance Images
… time for a Magnetic Resonance Imaging (MRI) scan and time for the analysis result to come out. Currently diagnosing the lower back pain is done by visual observation and analysis of the lumbar spine MRI images by radiologists and clinicians and this process could take up much of their …
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An investigation of the relationship between anterior knee pain and lower limb biomechanics.
… evidence to support this. A quantitative study explored the dynamics of walking barefoot, shod and with orthotic devices using the 3D Kinematic Motion Analysis System, Vicon 370. Sample sizes of 30 control subjects and 30 subjects with anterior knee pain were recruited. Kinematic gait …
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Effects of Atomoxetine and Methylphenidate on functional brain activation in Medication-naive children with Attention Deficit Hyperactivity Disorder
… present functional magnetic resonance imaging (MRI) study compared the effects of two commonly prescribed medications for Attention Deficit Hyperactivity Disorder (ADHD), the stimulant methylphenidate (MPH), and the non-stimulant Atomoxetine (ATX) in ADHD. Brain activation and task performance …
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The Relationship Between Phonological Short-Term Memory (pSTM) and Categorical Perception of Speech
… typical adults (N = 75). Finally, a functional MRI study provided preliminary evidence that perceptual demands and pSTM demands do not load on a shared brain network (Chapter Five). Thus, by collating evidence from children and adults, and using behavioural and neuroimaging approaches, I …
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Evaluation of IP-10 and TNFalpha-transducing parvoviral vectors as antitumoral agents in animal glioblastoma models
… simultaneously. Histological analysis and MRI study showed that antitumoral effects in this system (tumor growth delay, reduced tumor volume and prolongation of animal survival) were not dependent on the inhibition of angiogenesis. We were able to show that intact immune system is necessary …
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Cognition and apathy in normal pressure hydrocephalus
… associated with more severe apathy. A structural MRI study was then conducted to expand on these findings and to define brain structural correlates of apathy in NPH (Chapter 4). Results from this study suggested a potential role of the caudate nuclei in apathetic symptoms in NPH. Finally, …
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Single-sided magnetic resonance sensors for clinical detection of volume status
… for fluid diagnostics with clinical MRI. The primary research question that motivated this thesis is: can a point-of-care relaxometer accurately distinguish muscle interstitial fluid shifts in a single measurement? Several approaches are used to answer this question including …
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