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 frequency"”.
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Exploring Neural Activities in the Prefrontal Cortex of Fragile X Syndrome Mouse Models Using Electroencephalography
… have identified alterations in gamma power, alpha slowing, cross-frequency coupling, and reduced signal complexity, suggesting potential translational biomarkers of network dysfunction. However, the extent to which these signatures are conserved in preclinical models—especially in female …
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An Electrophysiological Investigation into the Role of Cognitive Control in the Attentional Blink
… control), and event-related and resting alpha frequency oscillatory activity (reflecting degree of attentional investment), are used to explain both intra- and inter-individual variability in performance on the AB task. Results supported the hypothesis that stronger cognitive control and …
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The Effects Of The Allocation Of Attention Congruent With Lateralized Cognitive Tasks On EEG Coherence Measurements
… orienting. This effect of attention on alpha coherence values was found in the low alpha (8-10 Hz) frequency band. This provides evidence that the lower alpha frequency band is reflective of manipulations of attention. The higher coherence measures for the congruent orienting group …
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The electroencephalogram in manic-depressive psychosis : relationship to psychological features and implications for a toxic-organic pathogenesis.
… and electroencephalographic features, notably alpha frequency and irregular fast low voltage records which she termed "choppy". The scope undertaking is, however, wider in as much as we shall be testing correlations with rhythms other than the alpha, and not only in respect of frequency but …
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The electroencephalogram in manic-depressive psychosis : relationship to psychological features and implications for a toxic-organic pathogenesis
… and electroencephalographic features, notably alpha frequency and irregular fast low voltage records which she termed "choppy". The scope of our undertaking is, however, wider in as much we shall be testing correlations with rhythms other than the alpha, and not only in respect of frequency but …
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Behavioural and neurophysiological measures of haptic feedback during a drilling simulation
… between haptic and non-haptic trials in the alpha frequency band (8-13 Hz). This work provides evidence that task-relevant haptic feedback can enhance motor performance, and may facilitate motor learning processes.
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Assessing the oscillatory properties of functional connections between sensory areas during crossmodal illusions: A correlational and causal investigation.
… evidence of a correlation between individual alpha frequency and the auditory-induced Double Flash Illusion (DFI). We also provided evidence of a previously unreported correlation between individual beta frequency and the corresponding tactile-induced DFI. In two follow-up studies evidence is …
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EEG measures of subjects with idiopathic chemical sensitivity: A test of the sensitization model
… show increases in the amplitude spectrum in the alpha frequency band across experimental sessions during exposure to odorant stimuli. Additionally, it was hypothesized that the healthy control subjects would show little or no changes over time. As predicted, the chemically sensitive and the …
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The entrainment of brain oscillations through transcranial alternating current stimulation (tACS) delivered at off-peak frequencies.
… the possibility of modulating endogenous frequency peaks, through entrainment, from stimulation delivered at off-peak frequencies. Study 1 utilised EEG recordings to establish whether off-peak stimulation within the alpha frequency range could successfully shift individual alpha peak …
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Task-Dependent Oscillatory Brain Activity During Oculomotor Delayed Response Task
… demands during the delay period. Changes in alpha power were used to index cognitive efforts during the delay period. Continuous EEGs from 25 healthy young adults (18-34 years) were recorded using dense electrode array. The data was analyzed by 6-cycle Morlet wavelet decompositions in the …
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Computational Methods for the Assessment of Brain Connectivity in Visuo-Motor Integration Processes
… autoregressive (MVAR) models, studied in the frequency domain, allow quantitative assessment of connectivity separately for each specific brain rhythm. In spite of its widespread utilization and great potential, MVAR-based brain connectivity analysis is complicated by a number of theoretical …
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Towards A Comprehensive Evaluation of Driving Impairment and Assessment Technologies
… variability), and EEG signals (increased frontal alpha and theta power, reduced peak alpha frequency). ECG and respiration sensors performed reliably, while EEG data quality varied and required extensive processing. Behavioral changes on the road were consistent but subtle, with only lab-based …
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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 …