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 6 of 6 for “"Dynamic Causal Modelling"”.
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Setting location priors using beamforming improves model comparison in MEG-DCM
Modelling neuronal interactions using a directed network can be used to provide insight into the activity of the brain during experimental tasks. Magnetoencephalography (MEG) allows for the observation of the fast neuronal dynamics necessary to characterize the activity of sources and their …
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Age-Related Changes to the P3a and P3b
… the age-related changes to the underlying neural dynamics responsible for the age-related changes to the P3a and P3b. In chapter 2, we perform a wavelet transformation (WT) analysis of the P3a and P3b in younger and older adults to explore the age-related changes to the underlying neurocognitive …
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Electrophysiological Markers of Sensory Plasticity and Connectomics in Ageing and Mild Cognitive Impairment
… using electroencephalography (EEG) and Dynamic Causal Modelling (DCM) and 2) explore the utility of these measures in distinguishing between healthy ageing, and potential latent neuropathology in those classified with amnestic Mild Cognitive Impairment (aMCI); an 'at risk' group for …
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The Role of the Basal Ganglia in Memory and Motor Inhibition
… during prevention and cancellation. Through dynamic causal modelling (DCM), we found that both DLPFC and basal ganglia play effective roles to achieve inhibition in the task-specific regions (hippocampus for memory inhibition; primary motor cortex (M1) for motor inhibition). Specifically, …
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Uncovering Dynamic Semantic Networks in the Brain Using Novel Approaches for EEG/MEG Connectome Reconstruction
… (EEG/MEG) data in order to track dynamic modulations of activity and connectivity within the semantic networks while a concept unfolds in the brain. Moreover, in order to obtain more accurate connectivity estimates of the semantic networks, we propose novel methods for some of the …
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The effect of Alzheimer's disease on cortical microcircuits
… treatments. To this end, biophysically-informed dynamic causal models can support inferences around laminar and cell-specific disease effects from human non-invasive imaging. This thesis aims to use dynamic causal models to elucidate cellular-level effects of Alzheimer’s disease on cognition to …