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 16 of 16 for “"Neural synchrony"”.
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Toward optogenetic control of neural synchrony : experimental results from the hippocampal slice model of gamma oscillations and computational modeling
… never been possible to selectively manipulate neural synchrony without altering other fundamental properties of the system and observing the functional outcome. This limit may now be overcome with the introduction of genetically targeted light-activeatable means of controlling neural activity, …
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Neural Correlates of Repetition Priming: Changes in fMRI Activation and Synchrony
The neural mechanisms of behavioural priming remain unclear. Recent studies have suggested that category-preferential regions in ventral occipitotemporal cortex (VOTC) play an important role; some have reported increased neural synchrony between prefrontal cortex and temporal cortex associated with …
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Not the Pearls but the Thread: Using fNIRS Hyperscanning to Investigate Real-Life Social Interactions
… enabling researchers to directly investigate the neural mechanisms underlying active social exchange. Around the early 2010s, the use of functional near-infrared spectroscopy (fNIRS) became increasingly popular in hyperscanning research. This trend was driven by the technique’s high tolerance for …
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An Analysis Using State Space Global Coherence of Brain Dynamics in a Young Child Under Sevoflurane General Anesthesia
… for more precise, quantitative methods to assess neural synchrony and coherence in this vulnerable population. This thesis explores advanced state-space modeling techniques, specifically focusing on State Space Global Coherence (SSGC), to estimate global coherence (GC) during sevoflurane general …
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Gamma oscillatory activity in autism spectrum disorder during a face cueing task
… (ASD), causing cascading effects on development. Neural synchrony in the gamma frequency band is thought to be involved in cognitive functions such as joint attention. The current study investigated differences in gamma power between neurotypicals and ASD as measured by magnetoencephalography …
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The neural correlates of social and non-social decision-making in resolving complex, dynamic uncertainty
… modeling these processes, but the cognitive and neural dynamics that govern real-time appraisal during complex narratives remain underexplored. Across three studies, this dissertation investigated how individuals dynamically appraise social and non-social ambiguity using a 45-minute episode of a …
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Form in Darkness: Linking Visual Cortex Structure With Spontaneous Neural Function
Spontaneous neural activity within visual cortex is synchronized at varying spatial scales, from the cytoarchitecural level of individual neurons to the coarse scale of whole regions. The neural basis of this synchronicity remains ambiguous. In this thesis, we focus on the role visual experience …
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Modeling phase synchronization of interacting neuronal populations : from phase reductions to collective behavior of oscillatory neural networks
… The coordinated interplay between neurons and neural circuits allows to perceive, process and transmit information in the brain. As such, synchronization phenomena occur across all scales. The coordination of oscillatory activity between cortical regions is hypothesized to underlie the concept …
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Early Detection of Neurodegenerative Diseases from Bio-Signals: A Machine Learning Approach
… in EEG signals of Alzheimer’s patients, three neural synchrony measurement techniques; phase synchrony, magnitude squared coherence and cross correlation are applied on three different databases of mild Alzheimer’s disease (MiAD) patients and healthy subjects. I have compared right and left …
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Decision-Making with Heterogeneous Sensors - A Copula Based Approach
… is large.</p> <p>The problem of quantifying neural synchrony using copula functions is also investigated. It has been widely accepted that multiple simultaneously recorded electroencephalographic signals exhibit nonlinear and non-Gaussian statistics. While the existing and popular measures …
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Cortical Tracking of Syntax in Post-Stroke Aphasia: An EEG Investigation of Disrupted Sentence Comprehension
… these perspectives may be disambiguated by the neural activity profiles of people with aphasia during comprehension. For this purpose, we examined aphasia-related changes in cortical “tracking” of phrases—which has been suggested as a neural correlate of successfully encoded grammatical content. …
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Anteromedial Thalamus Gates the Selection & Stabilization of Long-Term Memories
… for mice. We used fiber photometry to record neural activity from multiple regions across the brain throughout consolidation and identified a unique and significant neural correlate of memory in anterior thalamus that emerged in training and persisted for weeks. Inhibition of the anteromedial …
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Mother-newborn EEG connectivity during affectionate touch and impact of hypoxic-ischaemic encephalopathy
… (BAMBY) study to assess mothers’ and babies’ neural responses to affectionate touch in the days after birth. I recruited and studied 37 mother-newborn dyads, recording hyperscanning electroencephalography across social (mother and baby skin-to-skin) and nonsocial (mother and baby separate) …
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The Impact of Cortical State On Neural Coding and Behavior
… of cortical networks influence sensory coding in neural circuits and the behavior of the animal are unknown. To shed light on this issue, we conducted multi-unit electrophysiology experiments in visual areas V1 and V4 of behaving monkeys. First, we studied the impact of neural population spiking …