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 28 for “"Neural oscillations"”.
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State space models for isolating neural oscillations
… cells at the population level can be observed as oscillations of varying frequency and power, in local field potential recordings as well as non-invasive scalp electroencephalograms (EEG). These oscillations are thought to be responsible for coordinating activity across larger brain regions and …
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Learning Long Temporal Sequences in Spiking Networks by Multiplexing Neural Oscillations
… could drive the activity on their underlying neural populations. For instance, writing the word "time" requires a precise sequence of muscle contraction in the hand and wrist. There has to be some patterns of activity in the areas of the brain responsible for this behaviour that are …
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Explorations of beta-band neural oscillations during language comprehension: Sentence processing and beyond
Contains fulltext : 168943.pdf (Publisher’s version ) (Open Access)
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The Influence of Aging and Parkinson’s Disease on Neural Oscillations Associated with Memory Consolidation
… extremely stereotypical patterns of oscillatory neural activity found in almost all mammals. Within these characteristic patterns of wide-scale neural activity occurs crossregional synchronization of oscillations of various frequencies and this coupling is fundamental to the process of memory …
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State-space Modeling of Neural Oscillations: Toward Assessing Alzheimer’s Disease Neuropathology with Sleep EEG
… sleep as a window of opportunity to assess neural activity impacted by AD neuropathology before clinical symptoms emerge. However, many existing practices in sleep electroencephalography (EEG) analysis are based on visual inspection and the ubiquitous Fourier transform. These approaches face …
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Developmental Alterations to the Alpha-Beta Neural Oscillations Underlying Verbal Working Memory Function in Children and Adolescents
… improvements are well-documented, the underlying neural mechanisms of WM development, particularly that which is related to neural oscillations, is understudied and warrants further investigation. This study aimed to characterize the developmental trajectory of neural oscillatory activity, …
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Modelling resting-state neural oscillations to uncover circuit mechanisms of aging and rTMS response in late-life depression
… and neurological disorders. Resting-state oscillations are rhythmic neural patterns observed when the brain is not engaged in a specific task, measurable via magnetoencephalography (MEG) or electroencephalography (EEG). Alpha rhythms, a prominent feature of these oscillations, are altered …
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Electrophysiological Signatures of Spatial and Temporal Coding in Humans
… is still poorly understood in humans. One of the neural signatures in humans related to memory and navigation are neural oscillations in cortical and subcortical regions (such as the hippocampus). The presence of cortical and hippocampal theta oscillations predicts better subsequent memory and …
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Causal role of different frequencies of brain rhythms for the processing of conscious and unconscious perceptual contents
… of conscious and unconscious information. Neural oscillations are fundamental to information processing and communication in the brain. While many studies have shown a correlational and causational role of these neural oscillations for the maintenance of conscious information, there exists …
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State Space Methods Using Biologically-Relevant Generative Models to Analyze Neural Signals
Neural oscillations have long been recognized for their mechanistic importance in coordinating activity within and between brain circuits. Co-occurring broad-band, non-periodic signals are also ubiquitous in neural data and are thought to reflect the characteristics of population-level neuronal …
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Constructing multiple objects across space and time
… the reader to the existing literature on neural oscillations, specifically alpha band frequency, which is hypothesized to play a critical role in temporal processing and attention. This is followed by a review of the literature on temporal integration and the theoretical background of …
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Cannabinoids and Psychosis – Cause and Treatment
… to excess striatal dopamine release or abnormal neural oscillations respectively.</p> <p>The cannabis plant contains over sixty cannabinoid molecules, one of which, Cannabidiol (CBD) can antagonise some of the pharmacological effects of THC. It has been suggested that the absence of CBD in …
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Analysis of beta-band MEG coherence in ASD during direct gaze processing: Relationship to social cognition
… but no studies have employed a more holistic neural network approach analyzing coherence (i.e., synchrony of neural oscillations) during direct gaze processing. The current study examined coherence between each pair of 54 brain regions and the relationship between average coherence and …
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Mechanisms of Deep Brain Stimulation for the Treatment of Parkinson's Disease: Evidence from Experimental and Computational Studies
… We quantified changes in error index as well as neural activity within the model GPe and globus pallidus interna (GPi, equivalent to the SNr in rats).</p><p>Using these two approaches, we first quantified the effects of different frequencies of STN DBS. High frequency stimulation was more …
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Midfrontal Theta Power and Attention in Middle Childhood
… development. Previous research has linked neural oscillations in the theta frequency band to controlled attentional and cognitive processes, which has been replicated in children and adults. The development of executive attention, which biases attention and alters mental representation in …
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Sensory Entrainment, Paying Attention, and Keeping Beat: General Effects and Individual Differences
Neural entrainment is a phenomenon whereby neural oscillations adjust their frequency to synchronize with the periodic vibration of external stimuli. Research suggests that neural entrainment may help explain the relationship between music education and more optimal cognitive performance later in …
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Optimal Control of Weakly Forced Nonlinear Oscillators
… by reduced order dynamical systems. Control of neural oscillations by external stimuli has a broad range of applications, ranging from oscillatory neurocomputers to deep brain stimulation for Parkinson's disease. In this dissertation, we investigate fundamental limits on how neuron spiking …
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A computational study of the origin of brain oscillations at multiple scales
… are observed both using indirect recordings of neural activity, such as resting-state functional magnetic resonance imaging (rs-fMRI), or direct recording of neural activity with electrophysiology. The origin and role of such oscillatory patterns and their relationship between those observed …
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Molecular Mechanisms of Melatonin Action on the Rat Suprachiasmatic Nucleus: An in Vitro Analysis
… generates a near 24-hour pattern of spontaneous neural activity that may communicate timing between cells of the SCN as well as in targets of SCN projections. The timing of the molecular and neural oscillations of the SCN can be adjusted by various stimuli, including the pineal hormone melatonin. …
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The Effects of Altered Partial Pressures of Gas on Cognitive and Neural Function
Oxygen is central to neural function, yet the precise mechanisms and effects by which varying <br/>oxygen levels, whether through Hypoxia, Hyperoxia, or Hyperbaric Oxygen Therapy (HBOT), <br/>shape cognition and brain activity remain incomplete. This thesis adopts a novel, multi-modal …
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