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 154 for “"spatial memory"”.
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Spatial-memory control of defensive actions
… of mouse instinctive defensive behaviours on memory of the spatial environment, and the neural mechanisms responsible for accurate escape towards refuge. First, using behavioural assays, I show that the choice and execution of defensive behaviours rely on rapidly acquired memory and are …
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EFFECTS OF LEUPEPTIN ON AVERSIVELY MOTIVATED SPATIAL MEMORY
… thought to play a crucial role in mammalian memory formation. In vitro, this effect is correlated with a long-lasting enhancement of efficacy in synaptic transmission (long-term potentiation, LTP) following brief pulses of electrical stimulation in the hippocampus (Dunwiddie & Lynch, 1979). …
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Spatial History: Using Spatial Memory to Recall Information
… but they cannot remember which document. SpatialHistory looks to allow a user to recall which windows and documents were open at a certain time spatially. The user may query a particular region of a large display and SpatialHistory will report the windows that were open in that area. …
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The neural correlates of Human Spatial Memory and Representation
The importance of object-location memory for our everyday survival is now well accepted. This behaviour relies on spatial representation and memory within the brain. With these representations, we are able to construct what has been described as a “cognitive map” (Tolman, 1948) that allows us to …
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Exploring spatial memory in children with autism and ADHD
The study investigates spatial memory in neurotypicals, ASD and ADHD children. In a reaction-time accuracy task, children (N = 117) were presented with a grid containing twenty-five individual places. In the presentation phase, children saw different categories of object-in-places which varied from …
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The Neural Correlates of Allocentric Spatial Memory in Schizotypy
In this thesis, allocentric spatial memory was investigated in healthy volunteers with average and high levels of schizotypal traits assessed using the Schizotypal Personality Questionnaire. Functional and structural MRI was used to investigate the neural correlates of allocentric spatial memory in …
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Reference frame definition, use, and interaction in spatial memory
In order to preform actions and reason about spatial relationships in the world, a mental representation of spatial locations is needed. The exact nature of this representation has been debated among research groups with some concluding reference frames are self-based (egocentric), while others …
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The role of expertise, semantics, and learning in spatial memory
… the mechanisms that underpin object location memory. It approaches this endeavour by examining a recently reported phenomenon of spatial memory, that of exclusivity. Exclusivity states that given the opportunity to encode or retrieve two spatial memories, only one memory is relied upon for …
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The role of reuniens and rhomboid thalamic nuclei in spatial memory
<p>Spatial working memory is the ability to encode and temporarily store information for future retrieval to guide behavioral responses. Two areas of the brain that are important for this process are prefrontal cortex (PFC) and hippocampus. The hippocampus has strong connections to medial PFC, …
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IT’S THE JOURNEY, NOT THE DESTINATION: ARRAY STABILITY SUPPORTS FLEXIBLE SPATIAL MEMORY
The ability to recall a spatial layout from multiple orientations – spatial flexibility – is a challenging cognitive process, especially when the global configuration cannot be viewed from a single vantage point, as spatial information must first be integrated before it can be flexibly recalled. …
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Spatial memory function and hippocampal cholinergic activity: restoration by intrahippocampal septal grafts
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Investigating the role of the hippocampal formation in episodic and spatial memory
… in the relational encoding of episodic memory and the neural representation of allocentric space, using a combination of pharmaceutical manipulations and single-unit recording techniques in rodents. The first part of this thesis focuses on episodic-like memory, defined by the original …
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A role for hippocampal and midbrain neural processing in context-dependent spatial memory
… is thought to be the byproduct of an allocentric spatial reference framework generated by the hippocampus. It is commonly assumed that hippocampal place cells (i.e., neurons that are activated when the animal occupies a particular location in the environment; the place field), underlie this …
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Endocannabinoid Modulation of Spatial Memory in Aversively and Appetitively Motivated Barnes Maze Tasks
Genetic deletion or pharmacological blockade of the CB1 receptor has been reported to impair extinction learning in aversive conditioning (i.e., conditioned fear and Morris water maze) paradigms, but not in operant procedures in which food reinforcement is earned. It is difficult to discern whether …
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Dose-Response Effects of Lithium on Spatial Memory in the Black Molly Fish.
… task used extensively in rodents as an index of spatial STM. Employing this paradigm we designed a dose-response experiment utilizing chronic lithium regimens with a wide range of dosage groups to assess STM in the black molly. Results of the experiment indicated a robust effect in which …
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Diazepam administration during acute thiamine deficiency attenuates subsequent neuropathology and spatial-memory deficits in rats
… in rats causes deficits on a wide variety of spatial-memory tasks. PTD-induced memory deficits are thought to result from damage in areas of the diencephalon that are selectively vulnerable to the metabolic disruption of thiamine deficiency. However, a high incidence of seizures during the …
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Investigating Spatial Memory Reconsolidation in Rats: Memory Updating, Effects of Aging, and Hippocampal Network Activity
… that reactivation or retrieval of a consolidated memory opens up a window of time during which the memory can be strengthened, disrupted, or updated via a process of "reconsolidation". This dissertation is comprised of three experimental studies in rats aimed at investigating previously unexamined …
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Allocentric spatial memory following anterior temporal lobectomy: A comparison between active and sedentary epileptic adults
… left hemisphere hippocampal region and verbal memory has been well established. Similarly, neuropsychological outcomes following left anterior temporal lobectomy (ATL) have been well documented, with deficits in the ability to learn new verbally encoded material consistently displayed. However, …
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Exploration of the Wechsler Memory Scale Fourth Edition (WMS-IV) Designs Content and Spatial Memory Scales
… subtest was newly added as a measure of visual memory to the Wechsler Memory Scale, 4th edition (WMS-IV). This study examined this measure in a mixed clinical sample (n = 158). Specifically, the aim of the study was to evaluate the publishers’ claims that the Designs test assesses both visual …
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