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Showing 1 to 17 of 17 for “"dynamic functional connectivity"”.
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DYNAMIC FUNCTIONAL CONNECTIVITY NETWORKS: NEW ANALYSIS AND INTERPRETATION STRATEGIES
… network studies have implicitly assumed that functional connectivity between distinct brain regions is static over the recording period of resting state scans. Brain network organization must dynamically recognize, integrate and respond to internal and external stimuli across multiple time …
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A Bayesian model for dynamic functional connectivity estimation in the human brain with structural priors
Studies of dynamic functional connectivity have demonstrated that anatomical linkage is related to persistent functional connectivity. Bayesian models can leverage this connection by regularizing estimates of functional connectivity according to the strength of the corresponding structural …
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The Effects of Chronic Sleep Deprivation on Sustained Attention: A Study of Brain Dynamic Functional Connectivity
… integration between anatomically distributed and functionally connected brain regions. Functional connectivity has been widely used to characterize brain functional integration, which measures the statistical dependency between neurophysiological events of the human brain. Further, evidence from …
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Investigating the Impact of Sleep on Early Dynamic Functional Connectivity: A High-Density Diffuse Optical Tomography Study in Term and Preterm Neonates
… Stangenes et al., 2017). This thesis examines dynamic functional connectivity during sleep in term and preterm neonates using High-Density Diffuse Optical Tomography (HD-DOT), a functional near-infrared spectroscopy (fNIRS) technology. The goal of this work was to clarify the relationship …
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Understanding Brain Signal Variability and Why it Matters in Maturation from Childhood to Adulthood
… to other metrics, some of them reflecting brain dynamics, e.g., BOLD signal complexity (quantified by multi-scale entropy), functional connectivity and dynamic functional connectivity. This work suggests that the relationship between BOLD SD and complexity is time scale dependent, with a positive …
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Dynamic Neural Correlates of Mental Attention Capacity
… well understood. Here, a novel implementation of dynamic functional connectivity (dFC) analysis of resting-state functional MRI data with parcellation of individual brains into a common set of functional areas (Group Prior Individual Parcellation, GPIP) was used to determine whether dFC is 1) …
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Time-resolved Resting-state fMRI of Brain States Associated with Drug-resistant Epilepsy
… 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 used to determine …
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Functional Brain Connectivity Estimators: Understanding and Developing New Methodologies
… for constructing a specific part of the brain functional networks (i.e., functional connectivity or the relationship between different parts of the functional networks). In addition, we will develop new methodologies for estimating functional connectivity and propose modifications for other …
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Inferring differences between networks using Bayesian exponential random graph models
… studies is to better understand how the functional connectivity structure of the brain changes with a given phenotype such as age. Functional connectivity can be characterised as a network, with nodes corresponding to brain regions and edges corresponding to statistical dependencies …
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Complex, yet Resolved: Time-, Frequency-, and Information-resolved Approaches to Brain Function and Human Consciousness
… conceptualising brain function (quantified from functional MRI), and how it may support consciousness. First, I adopt a time-resolved perspective, decomposing brain activity into predominantly integrated or segregated patterns of dynamic functional connectivity. Building on my previous work in …
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Functional Connectivity Within the Dynamic Pain Connectome Underlying Inter-Subject Differences in Acute and Chronic Pain
… patients. Thus, this thesis investigated how functional communication between brain networks involved with pain processing and coping, as assessed by static and dynamic measures of resting-state functional connectivity, are related to inter-individual differences in pain perception and coping …
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Novel Functional Magnetic Resonance Imaging Analysis Approaches for Investigations of the Dynamics of Resting-State Functional Connectivity
… of blood-oxygenation level-dependent functional magnetic resonance imaging (BOLD fMRI) signals are highly synchronous between brain regions that serve similar functions. This provides a means to investigate functional networks of the human brain; however, most data analysis techniques …
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A non-convex framework for structured non-stationary covariance recovery theory and application
… the neuroscience application of estimation of dynamic brain connectivity. Empirical results using simulated and real brain imaging data illustrate that our approach improves time-varying covariance estimation as compared to baselines.
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Moment-to-moment Variability of Intrinsic Functional Connectivity and Its Usefulness
The brain connectivity of resting-state fMRI (rs-fMRI) represents an intrinsic state of brain architecture, and it has been used as a useful neural marker for detecting psychiatric conditions such as autism spectrum disorder, as well as for predicting psychosocial characteristics such as age. …
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Genetic effects on the temporal organization of connectome dynamics and associated cognitive functions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Genetic effects on the temporal organization of connectome dynamics and associated cognitive functions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Ανάπτυξη και εφαρμογή τεχνικών νευροπληροφορικής για τη δυναμική ανάλυση της λειτουργικής συνδεσιμότητας μέσω πολυκαναλικών σημάτων
Σκοπός της παρούσας διδακτορικής διατριβής είναι η ανάπτυξη μεθόδων και εργαλείων εξόρυξης δεδομένων που αναλύουν χρονικά μεταβαλλόμενους γράφους λειτουργικής συνδεσιμότητας, αυξάνουν τον διαχωρισμό μεταξύ δύο καταστάσεων ή δύο ομάδων από υποκείμενα και μετασχηματίζει ένα μεγάλο αριθμό από δυναμικά …