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 13 of 13 for “"EEG-fMRI"”.
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An information theoretic approach to EEG-fMRI integration
… of signals from electro-encephalography (EEG) and functional magnetic resonance imaging (fMRI), acquired simultaneously from the same observer, holds great potential for the elucidation of the neurobiological underpinnings of human brain function. However, the most appropriate way in which …
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Identifying the Seizure Onset Zone using Intracranial EEG-fMRI
Simultaneous EEG-fMRI has been an effective technique for identification of the seizure onset zone (SOZ) in patients with refractory epilepsy. Recent studies have shown that using intracranial electrodes (iEEG) combined with fMRI offers unique insight into changes in blood oxygen-level dependent …
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Fúze simultánních EEG-FMRI dat za pomoci zobecněných spektrálních vzorců
… během posledních 15 let výzkumu simultánního EEG-fMRI. Aktuální dizertační práce shrnuje aktuální současný stav v oblasti výzkumu fúze simultánních EEG-fMRI dat a pokládá si za cíl vylepšit vizualizaci úkolem evokovaných mozkových sítí slepou analýzou přímo z nasnímaných dat. Dva rozdílné …
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Novel data-driven analysis methods for real-time fMRI and simultaneous EEG-fMRI neuroimaging
… novel methods to perform data fusion between EEG and fMRI data acquired simultaneously. The core of this thesis is organized around four "experiments", each one addressing one of these specic aims. The main results can be summarized as follows. Experiment 1: a data analysis software has been …
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Safety and data quality of EEG recorded simultaneously with multi-band fMRI
… and functional magnetic resonance imaging (EEG-fMRI) is highly informative yet technically challenging. Until recently, there has been little information about EEG data quality and safety when used with newer multi-band (MB) fMRI sequences. Here, we measure the relative heating of a MB …
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Algorithms for enhanced spatiotemporal imaging of human brain function
… resolution. The electroencephalogram (EEG) and magnetoencephalogram (MEG) measure neuronal activity with high temporal resolution, and provide clinically accessible signatures of brain states. However, they have limited spatial resolution for regional dynamics. Combinations of M/EEG …
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Delineating the Neural Correlates of Visual Awareness through the Integration of Multimodal Neuroimaging and Noninvasive Electrical Neuromodulation
… To this extent, we utilized simultaneous EEG-fMRI imaging to investigate both the electrophysiological and hemodynamic correlates of visual awareness during binocular rivalry. Binocular rivalry is a classic visual phenomenon in which one’s perception spontaneously fluctuates between two …
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Spatiotemporal brain imaging
… of functional magnetic resonance imaging (fMRI) with electroencephalography (EEG) and magnetoencephalography (MEG). fMRI provides millimeter spatial resolution, while EEG and MEG provide millisecond temporal resolution. The thesis is divided into two broad sections: Monte Carlo modeling …
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Spatiotemporal Neural Dynamics of Audiovisual Perception and Cross-modal Mental Imagery
… and combining the high spatial resolution of fMRI with the high temporal resolution of EEG to examine how the brain processes real-world audiovisual events and recalls them by cross-modal information. First, we characterized where and when different levels of stimulus information are processed …
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A functional imaging study of the relationship between the Default Mode Network and other control networks in the human brain
… analysis of combined electroencephalographic (EEG) recordings. Data utilised across a series of three experiments were obtained from combined EEG-functional Magnetic Resonance Imaging recordings acquired during technical development of a new scanner in the Clinical Research Centre, Ninewells …
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Brain Dynamics When Alertness Fluctuates but Attentional Demands Persist
… using functional magnetic resonance imaging (fMRI). First, we examined how sustained auditory attention impacts brain functional reorganisation during sleep onset. We compared how brain dynamics change when alertness decreases during active and passive levels of auditory task engagement. We …
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The negative BOLD response as a marker of the seizure onset zone
… and functional magnetic resonance imaging (iEEG-fMRI) has been proposed as a novel method of identifying the SOZ. However, iEEG-fMRI faces the methodological challenge of artifact introduced from MR scanning which completely obscures the physiological EEG signal. Therefore, the first step …
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The Effects of Nicotine on Attention Orienting
… were assessed using electrophysiological (EEG) and behavioral measures in an auditory number parity decision task with different levels of distraction. Participants made forced choice ‘odd’ or ‘even’ number decisions, while ignoring preceding or simultaneous novel distractors. A group of …