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.
Results
Showing 1 to 20 of 27 for “"fronto-parietal"”.
-
Fronto-parietal cortex in sequential behaviour
This dissertation investigates the fronto-parietal representation of the structure of organised mental episodes by studying its effect on the representation of cognitive events occurring at various positions within it. The experiments in chapter 2 look at the completion of hierarchically organized …
-
Cognitive flexibility and fronto-parietal control dynamics in aging
… Older adults show a specific decline in fronto-parietal regions and in executive function abilities, particularly in tasks that involve flexibly allocating attention. Here, in addition to age, corpus callosum and modulation over left frontal cortex predicted switch costs. Using …
-
Ready for Action! When the Brain Learns, Yet Memory-Guided Behavior Does Not Follow
… review and a meta-analysis and demonstrated that fronto-parietal attention and control networks are critical for memory-guided behavior. Study 3 empirically validated this working model, using time-frequency source localization. Specifically, I showed that, in addition to fronto-parietal networks, …
-
Delineating the Neural Correlates of Visual Awareness through the Integration of Multimodal Neuroimaging and Noninvasive Electrical Neuromodulation
… Differential patterns of activation in fronto-parietal networks and across the default mode network were associated with both subjective changes in visual awareness and maintaining perceptual stability during rivalry. Collectively, our findings suggest that suppression of eye-specific …
-
Quantification of neural substrates of vergence system via fMRI
… independent component analysis from to the fronto-parietal and cerebellar components within saccade and vergence tasks. Interestingly, cerebellar component showed delayed latency in the group level signal in comparison to fronto-parietal group level signals, which was evaluated to determine …
-
Usefulness of [18F]-Deoxyglucose Positron Emission Tomography in Diagnosing the Patients with Corticobasal Degeneration
… and cortical sensory loss. The asymmetric fronto-parietal cortical and subcortical hypometabolism was demonstrated in the previous [18F]-deoxyglucose positron emission tomography (FDG PET) scan studies. We investigated the hypometabolic pattern of Korean CBD patients using quantitative FDG …
-
Network coherence in autism spectrum disorder : a multimodal neuroimaging study of functional connectivity and spectroscopy MRI
… and treatment outcomes. Frontal, temporal, parietal and cerebellar pathways exhibit disrupted structural and functional connectivity in individuals with ASD and we sought to investigate the potential clinical utility of altered network coherence. Beta-adrenergic antagonism improved …
-
Dynamics of human decision-making : vestibular perception and neural correlates
… that binds choice action and confidence, a fronto-parietal network has been implicated. Such bi-local neural circuitry is consistent with dual-route model of metacognition, in which the prefrontal cortex supervises and evaluates objectlevel parietal cortex. However, the neural dynamics …
-
The Dissociation of Location and Object Working Memory Using Fmri and Meg
… in support of a neural system mainly involving a fronto-parietal neuronal network, but the role of specific brain areas is less clear. A proposal that has recently generated considerable debate suggests that a dissociation of object and location VWM occurs within the prefrontal cortex, in dorsal …
-
Pulsed out of awareness: EEG alpha oscillations represent a pulsed inhibition of ongoing cortical processing
… on visual awareness, as well as the frontal and parietal areas modulating this oscillatory activity. Chapter 7 concludes that together, this series of studies provides the foundation for an account of Alpha oscillations as a general pulsed inhibition mechanism which can be entrained by external …
-
Anatomical and Functional Organization of Domain-General Brain Regions
… Hz) that overlap with a canonical mask of the fronto-parietal control network. These findings contrast with spatially non-specific power decreases in the beta range (12-30 Hz). Thus, using similar task difficulty manipulations, electrophysiology and MRI functional signals converged on …
-
From Rest to Action: Functional Connectivity Architecture of the Human Hand Motor Network
… connectivity of the human anterior intraparietal area (hAIP), a key parietal hub for hand motor control. Participants underwent rs-fMRI before and after continuous theta-burst stimulation (cTBS) of hAIP. Univariate analyses revealed increased connectivity between hAIP and SMA, and between …
-
Neural Mechanisms For Learning In Dynamic Environments
… variables also modulated the integration between fronto-parietal and other brain networks. This modulation of functional networks was also associated with behavioral adaptation across individuals. In the third study, I further distinguished the functional roles of frontal and parietal regions …
-
The Effects of Nicotine on Attention Orienting
… processes are supported by the interplay of a fronto-parietal attention network that exerts a top-down influence on information processing and a superior temporal network that operates in parallel and that responds in a stimulus-driven manner to behaviorally salient stimuli. It is often …
-
Fossoriality In Snakes: Perspectives From Morphology And The Fossil Record
… is a clear morphological signal between the parietal of alethinophidian snakes and ecology. In general, the parietal of fossorial snakes is more elongate with a deep u or v shaped fronto-parietal suture, with an elongated posterior shelf that overlaps the braincase. These projects show how …
-
About turn:neural mechanisms underlying visual processing of rotated letters and digits
… in the posterior portion of the dorsal intraparietal sulcus and lateral and medial pre-supplementary motor areas, suggesting a fronto-parietal network underlying mental rotation. Experiment 2 showed that linear increases in parietal negativity between 350 and 710 ms only evident in the parity …
-
Investigation of wound characteristics and the force associated with skull fracture due to impact by a hammer
… study whole porcine heads were impacted on the fronto-parietal portion of the cranium. Half of the specimens were impacted with an implement resembling the shape and weight of a hammer. These hammer tests were conducted primarily to determine the type of trauma associated with such impacts and …
-
From Neural Dynamics to Psychological Profiles: A Comprehensive Study of Anxiety in Young and Adult Individuals
… Indeed, we identified a parieto-temporal and a fronto-parietal network linked to trait anxiety, along with correlations between anxiety and maladaptive strategies like rumination. Study 2 extends this investigation to a larger sample of young individuals, hypothesizing that gray and white matter …
-
The cognitive function of the DMN and its role in consciousness
… how their relationships with the DMN and the fronto-parietal control network (FPCN) are altered during drug-induced altered states of consciousness. The results suggest that the brain’s functional architecture, which is characterised by the seemingly contraposed relationship between the DMN …
-
Functional networks of within- and cross-modal divided attention
… involving the prefrontal cortex, the inferior parietal cortex and the claustrum. Under the cross-modal condition, however, the frontal and parietal activation was more extended and more bilateral and there was also stronger right hemisphere activation of the anterior cingulate gyrus and the …
Page 1 of 2