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 63 for “"spatial navigation"”.
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Mechanisms underlying spatial navigation
… provide a static map of space. Current models of navigation propose that this static grid cell map is used to support navigation behaviours. However, recent work shows that this grid map also conveys information about rewards and is deformed by environmental geometry, suggesting that grid cells …
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Spatial Navigation in Immersive Virtual Environments
… between ‘configurational’ properties of spatial layouts and movement flows, facilitating prediction of movement from designs. However, these studies are at an aggregate level and say nothing about how individuals make the micro-scale decisions producing these emergent regularities. They …
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Embodied interaction with visualization and spatial navigation in time-sensitive scenarios
… during the solution of complex, time-sensitive, spatial navigational problems. Toward the goal of assessing the level of operator's attention, we present a method linking the operator's interaction utility, inference, and reasoning. The level of attention was inferred through networks coined …
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Region-specific Mechanisms of Estrogen and Age on Neuronal Ensemble Activity During Spatial Navigation
<p>Estradiol modulates the use of spatial navigation strategies in female rats. The presence of circulating estradiol enhances learning on tasks that require the use of a hippocampus-dependent place strategy and impairs learning on tasks that require the use of a dorsal striatum-dependent response …
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An Examination of the Influence of Landmarks in Human Spatial Navigation Using a Virtual Water Maze
Research into spatial memory and navigation excelled with the invention of the Morris Water Maze (Morris, 1984). In this task animals are required to find a platform, hidden somewhere in a large circular pool of water (below surface level). As animals cannot see the goal directly, they must use …
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Effects of 17β-estradiol on learning and memory and strategy use during a hole board spatial navigation task in aged male rats
… been shown to ameliorate age related deficits in spatial learning and memory as well as to promote the use of an allocentric strategy during spatial navigation. While the majority of research using 17β- estradiol has been done using females rodents, there have been studies showing an improvement …
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Stress-induced sex differences in spatial naviagation
Certain forms of spatial navigation are centered, neuroanatomically, on the hippocampal formation, a brain structure vulnerable to increased levels of the stress hormone cortisol. Although empirical studies have identified a substantial sex difference, in favor of males, on laboratory-based spatial …
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The effect of early adversity on adult spatial cognition : a functional magnetic resonance imaging study
… control. Little focus has been placed on visualspatial cognition in traumatised individuals, however. The aim of this project, which comprised two studies, was to investigate visual memory and spatial cognition in adult survivors of childhood trauma. Study 1 compared the performance of 23 …
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An Investigation of the Effect of Chronic Unpredictable Stress on Hippocampal Integrity and Spatial Learning
… portion appears to be primarily associated with spatial navigation, while the ventral region has been linked to anxiety-related functions. Regionally-specific neuroplastic changes in the dorsal and ventral subregions of the hippocampus suggest that the hippocampus may play a dual role in the …
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Cardiorespiratory fitness as a modulator of hippocampal subfield structure and function in cognitive aging
… is critical for episodic memory formation and spatial navigation. Accurate episodic memory formation requires pattern separation, a neurocomputational process that orthogonalizes similar stimulus input into distinct neural representations and can be examined using behavioral mnemonic …
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Wayfinding in autism spectrum disorders
… battery [of tests], designed to assess general spatial ability as well as varieties of spatial cognition (including spatial navigation).
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NeverMind : an interface for human Memory augmentation
… between episodic memory formation and spatial navigation. On the basis of the biologically inspired process, I focus on the implementation of NeverMind, an augmented reality (AR) interface designed to help people memorize effectively. Early experiments conducted with a prototype of …
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The impact of acute psychological stress on spatial cognition
… and intimately involved in episodic memory and spatial cognition, the general aim of this study was to investigate the effects of psychosocial stress (and consequent cortisol increase) on spatial cognition and verbal memory in men and women. One group of 33 participants (16 males and 17 females) …
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Relational memory processes in adults with autism spectrum disorder
… and attention on memory, learning, and spatial navigation in ASD. In addition to memory behaviour, eye movements were measured. It was found that the EM impairment in ASD adults with average intellectual abilities persisted across a range of materials and types of relations, and that …
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Interactions between anterior thalamus and hippocampus during different behavioral states in the rat by Héctor Penagos.
… cognitive functions such as episodic memory and spatial navigation. Earlier work in rodents has demonstrated that hippocampal cell ensembles re-express firing profiles associated with previously experienced spatial behavior. Such recapitulation occurs during periods of awake immobility, slow wave …
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Neuropsychological profiles of adolescents with a history of childhood trauma
… abilities subserved by these regions, including spatial navigation, new learning, and executive functioning, are negatively affected. The aim of the current study was to provide a thorough investigation of how trauma exposure and PTSD effect adolescents' cognitive functioning (looking …
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Searching for knowledge. The neurophysiology behind the exploration of hippocampal cognitive maps.
… Neurons in the hippocampal formation support spatial exploration through locomotion, and eye movements in primates, as well as memory. However, how the hippocampus supports exploration across different cognitive domains remains unclear. In this thesis I will provide evidence that hippocampal …
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