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 23 for “"posterior parietal cortex"”.
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On the posterior parietal cortex and saccadic eye movements
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1991.
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Spatial perception and movement planning in the posterior parietal cortex
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1994.
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Unique and shared roles of the prefrontal and posterior parietal cortex in cognitive functions
The dorsolateral prefrontal cortex and the posterior parietal cortex are parts of the cortical network involved in attention, working-memory and executive function. The two areas share a number of similarities, although functional differences between the two have also been identified. A widely …
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The Role of the Posterior Parietal Cortex in Subjective and Objective Episodic Memory Recollection
… Models. The AtoM model proposes that the ventral parietal cortex (VPC) and dorsal parietal cortex (DPC) are responsive to bottom-up and top- down attention to memory, respectively, (Cabeza, 2008; Cabeza et al., 2008; Ciaramelli et al., 2008). The EB model, on the other hand, proposes that the VPC …
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NEURAL SIGNALS UNDERLYING COORDINATE FRAME OF ATTENTION IN AREA 7a OF PRIMATE POSTERIOR PARIETAL CORTEX
The posterior paritetal cortex is recognized as an association area that amalgamates sensory information and transforms it into signals enabling the coordination of motor actions. The allocation of visual attention is a necessary part of this process and posterior parietal area 7a is one of the …
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A multimodal investigation in eye movements
… between the frontal eye fields (FEFs), the posterior parietal cortex (PPC), and the cerebellar vermis (CV); (2) significantly more functional activity and task-modulated coactivation would be observed in binocularly normal controls (BNCs) compared with convergence insufficiency (CI) …
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EFFECTS OF ALCOHOL AND ACAMPROSATE, AN ALCOHOL USE DISORDER TREATMENT, ON NONHUMAN PRIMATE BEHAVIOR AND MEMORY
… including structures such as the prefrontal cortex, posterior parietal cortex and others. Many drugs are used in the treatment of AUD, with acamprosate being one of the most commonly prescribed drugs. The specific mechanism of acamprosate has not been identified, but it is thought to have an …
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PERSISTENT ACTIVITY DURING WORKING MEMORY: MATURATION AND CORTICAL SPECIALIZATION
… cognitive functions and dorsolateral prefrontal cortex (dlPFC) has generally been recognized as the seat of working memory. Development of working memory ability through adolescence, accompanied by structural changes has been reported in human studies, however, how neurophysiological changes in …
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Tactile tribology- investigation of tactile graphics and perception characterization using event-related potentials
… was observed in the primary somatosensory and posterior parietal cortex. There was also evidence to suggest that the adjacent cortical areas were involved in tactile perception tasks. Overall, ERP showed the potential to be an objective and quantitative tool for characterizing the cognitive …
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A brain-machine interface for investigating neural representations of navigation in a virtual environment
… the neural representations of navigation in the Posterior Parietal Cortex (PPC) of mice during a virtual navigation task. We recorded neural activity during completion of a T-maze task using 2-photon calcium imaging, and trained decoders to decode task relevant variables from recorded neural …
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What spatial reference frame is used for priming in visual search?
… of transcranial magnetic stimulation to the posterior parietal cortex did not modulate either allocentric or egocentric spatial priming effects (Study E). While the perception-action model predicts that egocentric information is short lived, the findings from the experiments presented in this …
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Beta EEG as a Correlate of Belief-Reasoning in Preschoolers
… failers exhibited beta suppression over the posterior parietal cortex, consistent with belief updating. In contrast, passers showed evidence of beta enhancement, suggesting cognitive maintenance. These results imply that failers misrepresent the protagonist’s belief as aligned with reality. …
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Chronic Stress Effects on Prefrontal Cortical Structure and Function
… and functional abnormalities in the prefrontal cortex. In three parallel rodent and human neuroimaging studies, this project assessed the effects of chronic stress on prefrontal cortical structure and function and the behavioral correlates of these changes. The first study used fMRI to elucidate …
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The Mechanisms of Proactive Interference and Their Relationship with Working Memory
… carried out by the left inferior frontal cortex (IFC) is involved in proactive control while episodic inhibition carried out by the left IFC and the posterior parietal cortex is involved in reactive control.
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Neural Mechanisms For Learning In Dynamic Environments
… 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 during …
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Unique Features and Neuronal Properties in a Multisensory Cortex
… AND NEURONAL PROPERTIES IN A MULTISENSORY CORTEX Multisensory processing is a ubiquitous sensory effect that underlies a wide variety of behaviors, such as detection and orientation, as well as perceptual phenomena from speech comprehension to binding. Such multisensory perceptual effects …
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Brain-Machine Interface for Reaching: Accounting for Target Size, Multiple Motor Plans, and Bimanual Coordination
… role of primary sensory (S1) and motor (M1) cortex during reaching movements. By varying target size during reaching movements, I discovered the cortical correlates of the speed-accuracy tradeoff known as Fitts' law. Similarly, I analyzed cortical motor processing during tasks where the motor …
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Brain stimulation reveals neural mechanisms of stereopsis
… mechanisms of stereopsis within the visual cortex. As a first step, I conducted a proof of concept study to confirm where in the visual cortex TMS can be used to study perception. I systematically mapped out where in the visual cortex TMS triggers self-propagating, perceptually noticeable …
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Neural Sympathy: Towards Interfaces Compatible with Neural Plasticity
… in vivo observations of drift from both visual cortex and posterior parietal cortex, as well as our own recordings from CA1, exhibit a preference for such heavy-tailed changes in representation. We take this as a subtle hint that downstream readouts within the brain must solve similar design …
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Neuroeconomics of Reward Information and Motivation
… valuation phases for these rewards differ in posterior parietal cortex and suggests computational topographies for different rewards. Chapter 4 employs within- and cross-participant MVPA, which rely on potentially different sources of neural variability, to identify brain regions that contain …
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