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 265 for “"resting state"”.
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Effects of Resting State On Perceptual Learning
<p>Psychophysical experiments in humans have demonstrated that improvements in perceptual learning tasks occur following daytime rests. The neural correlates of how rest influences subsequent sensory processing during these tasks remain unclear. One possible neural mechanism that may underlie this …
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Effect of scan time on resting state parameters
… low-frequency fluctuations (LFF) in a resting-state brain has steadily grown. By measuring LFF (< 0.08 Hz) in blood-oxygen-level-dependent (BOLD) signals, resting-state functional magnetic resonance imaging (rs-fMRI) has proven to be a powerful tool in exploring brain network …
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Longitudinal Changes in Resting-State Connectivity after Traumatic Axonal Injury
… connectivity and neurocognitive outcome. Resting-state fMRI and diffusion tensor imaging (DTI) scans were acquired from 21 patients with moderate-severe brain injuries consistent with TAI compared with 8 non-injured controls. Neurocognitive outcome was assessed at 7 months. Results …
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Resting State Functional Magnetic Resonance Imaging Alterations In Psychosis Spectrum Disorders
The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.
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Test-Retest Reliability of Coherence Measures of Qeeg During Resting State
… reliability of qEEG coherence during a resting state for 40 typically developing students at the University of South Carolina. Results indicated that coherence has moderate to high reliability across all bands and areas of the brain. Additionally, results were consistent with previous …
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Resting-state Functional Connectivity Correlates of Inhibitory Control over Emotional Stimuli
… anti-saccade task, therefore with the use of resting-state functional magnetic resonance imaging (fMRI) and an emotional anti-saccade task, this study aims to identify the neural correlates of inhibitory control over emotional stimuli. The anti-saccade task is known as an effective measure of …
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Comparison between different techniques of preprocessing for resting state fMRI analysis
Resting state functional connectivity as the name suggests is defined as significant temporal correlation between spatially distinct regions of the brain during rest. In this thesis, fMRI resting state dataset was analyzed using different available processing techniques with the same fMRI data to …
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Data-driven Methods for Resting-state fMRI Biomarker Discovery in Mental Illness
… dynamic functional network connectivity (dFNC) states. We posed three specific research questions to address several limitations in the current literature and enhance the characterization process through our contributions. Firstly, there is a need for methods for estimating brain networks to …
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A Study of Resting State FMRI Dynamic Functional Network Analysis of MTBI
… Static functional network analysis using resting state brain fMRI images has shown some promising results in identifying characteristics of MTBI. However, recent development in the dynamics of functional networks have been able to reveal insightful information about anomalies in brain …
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Resting-State Functional Brain Networks in Bipolar Spectrum Disorder: A Graph Theoretical Investigation
… The purpose of this study was to investigate resting state functional connectivity in individuals at low and high risk for BSD based on moderate versus high reward sensitivity, both with and without a BSD diagnosis, using graph theoretical network analysis. Results demonstrated decreased …
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Demographic Differences in Resting State EEG in Healthy Controls and Patients with Schizophrenia
… examined the impact of demographic variables on resting state EEG in either HC or Sz. The current study investigated whether demographic variables (i.e. age and sex) impacted theta (4-7 Hz), alpha (8-12Hz), beta (12-24Hz), and gamma (30-50 Hz) band power during resting state in 124 HC and 117. …
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Time-resolved Resting-state fMRI of Brain States Associated with Drug-resistant Epilepsy
… framework for time-resolved analysis of resting-state functional magnetic resonance imaging (fMRI) data with the aim of elucidating brain patterns of aberrant activity in individuals with drug-resistant epilepsy. Specifically, a dynamic functional connectivity analysis method is first …
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Resting State Neurophysiology of Agonist-Antagonist Myoneural Interface in Persons with Transtibial Amputation
… to the central nervous system. The study of resting state neural activity helps non-invasively characterize the neural patterns that prime task response. In this first study on resting state fMRI in AMI subjects, we compared resting state functional connectivity in patients with transtibial …
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The influence and manipulation of resting-state brain networks in alcohol use disorder
… to self-regulate the network rather than its resting-state tendency. We implemented a real-time fMRI experiment to test the degree to which people along the alcohol use severity spectrum can self-regulate this network. Our results showed that default mode network suppression is impaired as …
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Predicting Individual Differences on Two Episodic Memory Measures Using Resting-State Functional Connectivity Data
… associated with the cognitive variable. Using resting-state fMRI data from the Human Connectome Project, we extended the Rosenberg et al. methodology to episodic memory and evaluated its ability to produce significantly predictive models and provide insights into episodic memory networks. We …
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Differentiating schizophrenic patients from healthy control; application of machine learning to resting state fmri
… to train classifiers to decode stimuli, mental states, behaviors and other variables of interest from fMRI data. Most of these studies focus on fMRI low frequency oscillations. This study focuses on the amplitude of low-frequency fluctuations (ALFF) and fractional amplitude of low-frequency …
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Using Brain Topological Features Extracted from Resting State fMRI to Classify Autism Spectrum Disorder
… task. Graph theoretical measures, extracted from resting state functional MRI, have already proven useful in classifying other neurological disorders. I hypothesized that by using these features for Autism Spectrum Disorder classification, the model performance (accuracy) will improve over …
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Associations Between Resting State Functional Connectivity and Trajectories of General Psychopathology in Emerging Adolescents
… symptoms and is associated with alterations in resting state functional connectivity (RSFC). Specifically, aberrant connectivity within and between networks responsible for higher-order cognition and attention has been concurrently related to higher levels of p-factor scores in youth. It remains …
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Cortical Cartography: Mapping Functional Areas Across the Human Brain with Resting State Functional Connectivity MRI
… spontaneous BOLD activity, often referred to as resting state functional connectivity: rs-fcMRI), are especially promising as a way to delineate functional areas since they localize differences in patterns of correlated activity across large expanses of cortex. Presented here is the exploration, …
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