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 20 for “"theta power"”.
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EEG theta power during Necker cube reversals
… passive attention, there would be greater high theta power during the deliberate focusing of attention than during passive attentional processing, and there would be greater theta power in the right hemisphere. Thirty undergraduate psychology students had monopolar EEG recorded bilaterally from …
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Midfrontal Theta Power and Attention in Middle Childhood
… 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 the service of task goals, …
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Individual Differences In Lpp Amplitude and Theta Power Predict Cue-Induced Eating During A Cued Food Delivery Task
… of the late positive potential (LPP) and power (µV<sup>2</sup>) in the theta (θ, 4-8 Hz) frequency band as metrics of affective and cognitive processing, respectively. To identify individual differences in both affective and cognitive processing, I then conducted two separate …
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ERP and Theta Activity Associated with Facial Emotion Memory
… the relationship between ERP amplitude and Theta Power predict behavioral performance. P1 amplitudes at occipital electrode sites and N170 amplitudes at parietal sites differed by emotional expression. Increased P1 at occipital sites was the best predictor of correct matching of positive …
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Septotemporal Variation in Theta Rhythm Dynamics: Effects of Speed and Habituation
<p>Theta (6-12 Hz) field potentials and the synchronization (coherence) of these potentials present neural network indices of hippocampal physiology. Theta signals within the hippocampal formation may reflect alterations in sensorimotor integration, the flow of sensory input and/or distinct …
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EEG Features of Working Memory Impairment in Alzheimer’s Dementia and Mild Cognitive Impairment
… AD and MCI, with a focus on three EEG features: theta and alpha power, theta-gamma coupling, and theta phase synchronization. We hypothesized that these EEG features would be most impaired in those with AD, while individuals with MCI would present with less significant impairments. Additionally, …
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A domain-general perspective on medial frontal brain activity during performance monitoring
… response. It was also found that increases in theta occurred to each of these task events, and that the effects were evident at the group level and in single cases. In study 2, we replicated our method of classifying MFC activity to cues in our response task and showed again, using additional …
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Error-Related Theta Dynamics and Single-Trial Cognitive Control in Sports-Related Concussion
… from mistakes and inhibiting future responses. Theta dynamics are especially important in terms of error-related brain activity: increases in theta power, and increased connectivity between brain regions is mediated by synchronous theta rhythms. Previous investigations of error-related brain …
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Neural correlates of executive functioning in preschool children
… resting state electroencephalography (EEG) power (i.e., theta, alpha, beta) and EF ability in preschool and examine how early regulatory ability affects this later association. Thirty-seven 4-year-old children who previously participated in the PediaTracTM longitudinal study were recruited …
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A central medullary circuit regulating REM sleep and pontine waves
… composed of tonic features such as hippocampal theta oscillations and skeletal muscle paralysis, which are interleaved with short-lived phasic events such as rapid eye movements, limb twitches, and spike-like pontine (P)-waves. Considered a key hallmark of REM sleep, P-waves are coupled with …
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Orbitofrontal Cortex Repetitive Transcranial Magnetic Stimulation for the Treatment of Major Depressive Disorder
… With respect to EEG, increased frontal theta was found to be weakly, albeit non-significantly, predictive of future improvement. Improvement following OFC-rTMS was significantly correlated with decreases in frontal theta power. The findings of this thesis suggest that OFC-rTMS may be a …
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Development of Computerized Multicomponent Cognitive Stimulation for Improving Cognitive Functions in Older Adults with Mild Cognitive Impairment: A Multimodal Investigation Using Neuropsychological and EEG/ERP Assessment
… EEG analyses indicated increased theta power in the occipital region during the resting state and enhanced P3 amplitude and latency changes during cognitive tasks, particularly in the frontal and central regions. The findings suggest that CMCS, especially with integrated …
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The Effects of Physiological Stress on Brain-Computer Interface Systems
… significant increase in frontal to parietal beta power and a lower P300 peak amplitude in some participants during a BCI task. On the other hand, a dynamic stressor (Drone Collision Exposure Experiment) tends to produce a short-term increase in frontal and central theta power, along with a …
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Investigating the effects of oscillating sounds on the memory of older populations
… Alzheimer’s Disease. Oscillations at the theta (3-7 Hz) frequency, in particular, are thought to play an important role in memory. The peak frequency and amplitude of the theta frequency are modulated by age and could be a useful target to combat the cognitive decline commonly associated …
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Performance optimisation through the use of compression garments and biosensors
… in a reduction in sports performance and muscle power output alike. There were three main aims of the current study, and the first aim was to determine whether compression garments (CGs) affected cardiovascular function during exercise of running trainers. The second aim was to establish whether …
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The Effects of Altered Partial Pressures of Gas on Cognitive and Neural Function
… VEPs, with a specific reduced motor <br/>Beta power, suggesting more localised oscillatory disruptions. <br/>Chapter 6 then investigates HBOT using mobile EEG during a hyperbaric “dive,” to understand <br/>the neural impacts of HBOT. The results showed Delta power decreased cumulatively …
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Towards A Comprehensive Evaluation of Driving Impairment and Assessment Technologies
… 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 reaction time …
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The role of daytime napping in sleepiness and cognitive function in 24-70 year olds /
… However, microarchitecture showed greater theta, alpha, and beta power during Stage 1, and greater delta, alpha, and sigma power during Stage 2 for habitual nappers, for the most part indicating better sleep. Both groups felt less sleepy after the nap. P2 latency, reflecting information …
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Conflict and adaptation: Identifying the markers of cognitive control in the transition from wakefulness to sleep
… variables. In Chapter 5, we found an increase in theta power associated to incongruent trials, a classic neural marker of cognitive control. This effect was observed during wakefulness but not during drowsiness, suggestive of potential alternative mechanisms underlying cognitive control under …
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Dynamics of alpha power in multimodal processing
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01