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 18 of 18 for “"voxel-based morphometry"”.
-
Neuroanatomical differences in adults and children who stutter: a voxel-based morphometry study
… children groups were analyzed separately with voxel-based morphometry (VBM), an unbiased, whole-brain based volumetric technique. Adult group comparisons consisted of adults who stutter (n=12) versus adult controls (n=25), and pediatric group comparisons included recovered children (n=7); …
-
Validation of DARTEL registration technique. Application to Mild Cognitive Impairment and Schizophrenia using Voxel Based Morphometry
This research analyzes anatomic variability of brain structures due to Mild Cognitive Impairment and Schizophrenia. This information is coded by spatial transformation between Resonance Magnetic image and a template selected as anatomic reference. To get this information efficiently, DARTEL …
-
Localizing longitudinal changes in volumetric bone mineral density after acute knee injury using voxel-based morphometry
… which can be accurately captured using X-ray-based imaging modalities (e.g., dual energy quantitative computed tomography; DE-QCT) that capture bone mineral density (BMD). Voxelbased morphometry (VBM) can provide a comprehensive assessment of the entire bone structure through voxel-by-voxel …
-
Efficient Moments-Based Permutation Tests: A Framework, Methods and Applications
… a new blockwise permutation test approach based on the moments of the test statistic. The accuracy and efficiency of the proposed method are demonstrated through simulated experiments and magnetic resonance imaging (MRI) brain data, including the multi-site voxel-based morphometry analysis …
-
The Effect of C-Section Birth on Attention Task Performance and Cortical Grey Matter Integrity
… No other tests showed significant differences based on birth method. Additionally, whole-brain voxel-based morphometry analysis was conducted on the anatomical magnetic resonance imaging data of adults to identify potential effects of C-section birth on cortical grey-matter integrity. Findings …
-
Apathy and Impulsivity in Frontotemporal Lobar Degeneration Syndromes
… of frontotemporal lobar degeneration syndromes. Voxel based morphometry revealed distinct neural correlates for the components of apathy and impulsivity. Patient ratings correlated with white matter changes in the corticospinal tracts, which may reflect retained insight into their physical …
-
Learning task-optimal image registration with applications in localizing structure and function in the cerebral cortex
… registration are used in other tasks, such as voxel-based morphometry, functional group analysis, image segmentation and tracking. In this thesis, we argue that the quality of image registration should be evaluated in the context of the application. Consequently, we develop a framework for …
-
Multimodal Investigation of Neurobiological Alterations in the At Risk Mental State and First Episode of Psychosis
… alterations by performing a comparison between voxel-based morphometry and cortical thickness measurements. I then moved on to the investigation of alterations of regional activation and interregional coupling within a network of fronto-temporal regions, using a standard functional Magnetic …
-
Brain Connectivity in Autism Spectrum Disorder
… the findings from a metaanalysis of published voxel-based morphometry studies investigating white matter abnormalities in ASD. This analysis showed that patients with ASD display abnormalities in long white matter association tracts, such as the arcuate and uncinate fasciculus, known to be …
-
Inner speech in post-stroke aphasia : a behavioural and imaging study
… methods were employed in this instance: Voxel based Lesion Symptom Mapping (VLSM) and Voxel Based Morphometry (VBM). Lastly, functional magnetic resonance imaging (fMRI) was used to study the dynamics of functional activations supporting inner speech production. The study showed that …
-
Investigating the relationship between cognitive control and speech-in-noise recognition in tinnitus from perceptual, neuroanatomical, and electrophysiological aspects
… tinnitus percept impacts SiN recognition. Using voxel-based morphometry, the second study investigated the relationship between SiN performance and gray matter volume in auditory and cognitive processing regions in individuals with tinnitus. Lastly, using electroencephalogram to record brain …
-
Gray matter covariance networks in the mouse brain
… resolution morpho-anatomical MRI with network-based approaches on a large cohort of genetically-homogeneous wild-type mice (C57Bl6/J). To this purpose, I first developed a semi-automated pipeline enabling reliable Voxel Based Morphometry (VBM) of gray matter volumes in the mouse. To validate …
-
Behavioural and Neural Investigation of the Subjective Experience of Remembering
… episodic recall in normal ageing using voxel-based morphometry and a custom 3D object location memory task that manipulated visual perspective during both encoding and retrieval. Compared to healthy younger adults, older adults showed a general deficit in first-person recall of object …
-
The influence of low physical activity levels versus extreme physical activity levels on brain structure and working memory
… Resonance Imaging (MRI) and analysed using Voxel-Based Morphometry (VBM). Habitual levels of physical activity were measured using the Global Physical Activity Questionnaire (GPAQ). For the second part of this thesis, we tested participants aged 20-59 years. Participants were split into a …
-
Blushing and gaze avoidance in social anxiety disorder : a structural neuroanatomical investigation
… avoidance. Structural data was analysed using voxel-based morphometry (VBM). Regression and contrast analyses were used to correlate blushing propensity and gaze anxiety and avoidance symptoms with brain volumes, controlling for total grey matter volume, age and level of education. Results: …
-
Neuroimaging Depression Risk in a Sample of Never-Depressed Children
… neuroimaging techniques to characterize risk-based differences in children’s neural structure, function, and functional connectivity, most have used samples that include participants with a personal history of depression or older samples (i.e., past the typical age of onset for depressive …
-
Grey matter morphological changes in late life using magnetic resonance imaging technique
… lacking. The first topic is to examine the voxel‐wise correlation between GM volume and four cognitive domains. The findings are largely consistent with the conventional understanding of neuroanatomical basis of cognition. However, the lack of hemispheric predominance in these GM correlates, …