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 “"Alpha oscillations"”.
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Pulsed out of awareness: EEG alpha oscillations represent a pulsed inhibition of ongoing cortical processing
Alpha oscillations are ubiquitous in the brain, but their role in cortical processing remains a matter of debate. Recently, evidence has begun to accumulate in support of a role for Alpha oscillations in attention selection and control. In this thesis, a series of studies is presented investigating …
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Spontaneous alpha oscillations and low-frequency activities are related to complementary aspects of cognitive control
DSpace SAF Submission Ingestion Package generated from Vireo submission #14801 on 2020-02-28 at 17:24:28
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The good, the bad, the complex: Investigating the behavioural consequences of EEG alpha oscillations in visual detection and selective attention
… in ongoing brain activity, especially in the alpha band (8-12 Hz) of the scalp-recorded electroencephalogram (EEG), with variability in the detection of visual stimuli. Lower alpha power over posterior cortex is generally assumed to lead to superior detection performance. It has also been …
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The neurophysiology of intersensory selective attention and task switching
… referred to as task-switching.</p> <p>Neural oscillations in the alpha band (~8-14 Hz) have been shown to index the distribution of selective attention, and there is increasing evidence that oscillations in this band are in fact utilized by the nervous system to suppress distracting, …
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Do somatosensory oscillations relate to tactile attention? Extracting the phase of transcranial Alternating Current Stimulation (tACS) during stimulus presentation.
… that lateralised changes in the amplitude of alpha oscillations (8-‐14 Hz) are linked to orienting attention and that the phase of an oscillatory cycle can affect how behavioral and perceptual information is processed. Transcranial alternating current stimulation (tACS) is a non-‐invasive …
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Electrophysiological systems underlying human domain-general cognition and selective attention
… slope, and intercept) and oscillatory (theta, alpha, and beta power) components encode task demand and content across three cognitive tasks. Aperiodic broadband power, in particular, shows the strongest decoding performance and cross-task generalisability, highlighting its role in …
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Testing the limits of human vision with quantum states of light
… some preliminary results on how 8- to 13-Hz alpha oscillations in the brain (which have complex effects on neural excitability and visual perception) might impact the detection of few-photon stimuli.
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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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The influences of preparation and brain states on the time-course of oculomotor control in visual selection
… time variability, we tested the hypothesis that alpha-oscillations (8-12 Hz) occurring in the prestimulus period may influence performance and saccadic reaction times in a visual search task. Using a similar design, MEG and eye movements were measured concurrently. Results revealed that slow …
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Systematic examination of the impact of pre-stimulus alpha- mu and gamma band oscillations on perception : correlative and causal manipulation in mouse and human
… of dynamics in the expression of pre-stimulus oscillations on perception. Specifically, I test the prediction that alpha oscillations expressed in a given sensory representation within a neocortical map predict diminished sensory capability in that region of sensory space, while gamma …
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Brain Rhythms in Object Recognition and Manipulation
… in virtual reality, I demonstrated that beta oscillations are crucial to the retrieval of object knowledge during object recognition. Multiple evidence points toward an access to object knowledge during the 300 to 400 ms of visual processing. The different topographies of the beta oscillations …
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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 …