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 32 for “"Brain plasticity"”.
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Photoperiod, Brain Plasticity, and Behavior
… responses in male white-footed mice are reduced brain size, and a marked reduction in hippocampal volume. Given that the hippocampus is critical for spatial learning and memory, I explore the functional outcomes of having a small hippocampus in Chapter 2 utilizing a spatial learning and memory …
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Structural and functional brain plasticity for statistical learning
… decisions, we know surprisingly little about the brain circuits and how they change when learning temporal regularities. In my thesis, I combine behavioural measurements, Diffusion Tensor Imaging (DTI) and resting-state fMRI (rs-fMRI) to investigate the structural and functional circuits that are …
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Brain plasticity in speech training in native English speakers learning mandarin tones
… potential (ERP) measures to investigate brain plasticity associated with second-language (L2) phonetic learning based on an adaptive computer training program. The program utilized the acoustic characteristics of Infant-Directed Speech (IDS) to train monolingual American English-speaking …
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Revealing the plastic brain with functional connectivity: effects of exercise on brain plasticity and cognition
… about precisely how exercise effects on the brain benefit human cognition (Cotman and Berchtold, 2002; Kramer and Erickson, 2007). In this thesis I examine effects of physical activity on age-related deficits in brain function and cognition, followed by an examination of potential explanatory …
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Lithium and brain plasticity - studies on glial cell changes and electroconvulsive treatment-induced amnesia in rats
… have demonstrated structural changes in several brain regions implicated in mood regulation. Furthermore, bipolar disorder is associated with white matter abnormalities and post mortem analysis of brain tissue from patients with mood disorders have shown glial cell pathology. Electroconvulsive …
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The Effects of Nicotine Administration on Behavior and Markers of Brain Plasticity in a Rodent Model of Psychosis
… dopamine D2 receptor sensitivity in the brain. Studies have shown that schizophrenics smoke cigarettes at approximately 4 times the rate of the general population. It has been suggested that nicotine use is a form of self-medication for symptoms in schizophrenia. Smoking behaviors …
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Sensorimotor Recovery, Functional and Structural Brain Plasticity, and the Development of Chronic Pain Following Upper Limb Peripheral Nerve Transection and Microsurgical Repair
… indentified beneficial and maladaptive cortical plasticity following disease or injury. The general aim of this thesis was to determine the extent of sensory and motor recovery, functional and structural brain changes, and the impact of chronic neuropathic pain on sensorimotor outcomes following …
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Synaptic Plasticity in the Cerebral Cortex of Fragile X Knockout Mice
… mice. The role of FMRP in experience-dependent brain plasticity was also assessed. FMRP expression in the rat occipital cortex increases following exposure to a complex environment, but measures of synaptogenesis in Fmr1 knockout mice raised in this environment have been inconclusive. FMRP …
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Studies on cellular changes and amnesia in a rat model of electroconvulsive therapy
… effects are not fully understood. Enhanced brain plasticity, including neurogenesis, angiogenesis and synaptic reorganization, has been suggested to underlie the therapeutic effects of ECT. In the current thesis, we have studied cellular changes in an animal model of ECT - electroconvulsive …
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Aerobic Exercise and Hippocampal Plasticity in Young Adults with Depression
… shown promise in reducing symptoms and promoting brain plasticity in MDD. A relationship between symptom severity, hippocampus volume and N-acetyl-aspartate (NAA) concentration, a marker of neuron density/viability, has been shown. The relationship of these variables to fitness (as assessed by …
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Experience-Dependent Plasticity in the Mushroom Bodies of the Honey Bee Brain
I am interested in the mechanisms that modify brain structure in response to experience. The model organism under study is Apis mellifera, the European honey bee. The honey bee has a rich behavioral repertoire that can easily be studied both in the laboratory and under natural conditions. The goal …
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Changes in Activation During Production of Syllables from a Second Language
The current study sought to understand brain plasticity in adults associated with acquiring novel speech sounds. The Speech Learning Model suggests that the perception and the perceived similarity between L1 and L2 sounds will affect the acquisition of these L2 sounds (Flege, 1995). Productions of …
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User-centered Virtual Environment Assessment And Design For Cognitive Rehabilitation Applications
… the HEM affords the opportunity to integrate new brain imaging technologies (i.e., functional Near Infrared Imaging) to evaluate brain plasticity associated with VE based cognitive rehabilitation.
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fMRI for mapping the plastic somatotopy of primary somatosensory cortex - Development and clinical applications
… (fMRI) is a widely used tool for studying brain function in vivo. The technique is based on acquiring brain images sensitive to the physiological response following neural activation, and hence, allows brain activity to be examined and documented. In this thesis, methods for fMRI mapping of …
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The Opsins and Nuclear Receptors of the Honey Bee
… receptors as candidate regulators of neuronal plasticity in the insect mushroom bodies. The brains of older bees exhibit an expansion of the neuropil of the mushroom bodies relative to younger workers. Nuclear receptors transduce 20-hydroxyecdysone and juvenile hormone signals to regulate …
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Inhibitory mechanisms for visual learning in the human brain
… between indistinguishable targets. As the human brain is trained on this type of visual tasks, we observe changes in its function that correspond to improved performance. We use functional brain imaging, to measure learning-dependent modulations of brain activation and investigate the processes …
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The Neural Dynamics of Action Representation for Sound: An investigation of musical training effects on mu suppression
… links between auditory and motor areas of the brain. Long-term training develops, strengthens and enables flexibility in these connections allowing proficiency in performance. Functional neuroimaging studies have indicated that listening to trained music can result in the activity in premotor …
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