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 235 for “"Neural mechanisms"”.
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Neural mechanisms of attention to motion
… might operate and what are the underlying neural mechanisms. Three mechanisms have been proposed to account the effect of attention: contrast gain, response gain and baseline shift. However, psychophysical and neuroimaging studies produced results that are not always consistent. We used the …
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Neural Mechanisms of Homeostatic Need and Reward
… However, the underlying cellular and molecular mechanisms that reduce leptin signaling are unknown. As part of a metabolomic screen for biomarkers of a leptin effect, we found that leptin reduced the level of leucine and methionine, mTOR ligands, only in leptin-sensitive animals, raising the …
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Neural Mechanisms For Learning In Dynamic Environments
I investigated the neural mechanisms for learning in dynamic environments. In dynamic environments, where the underlying state of the environment can change, inferring the current state of the environment is important to guide adaptive behavior. People should maintain their beliefs about the …
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Neural Mechanisms Involved in Emotion /Attention Interactions
… different types of clinical groups, the exact mechanisms involved remain unclear. Dorsolateral prefrontal cortex (DLPFC), amygdala, dorsal (dACC), and rostral (rACC) anterior cingulate cortex (ACC) have been shown to play a critical role in the interaction of emotion and attention processes. …
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Brain stimulation reveals neural mechanisms of stereopsis
… allows me to causally relate induced changes in neural activity with changes in depth perception. This way I can map out neural 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 …
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Decoding belief: neural mechanisms of conspiracy message evaluation
… been widely studied, little is known about the neural mechanisms underlying credibility evaluation. The present study used electroencephalography (EEG) and event-related potentials (ERPs) to examine neural responses during a conspiracy message evaluation task under varying social credibility …
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Neural mechanisms underlying core visual perception of objects
… perception. Yet, little is known about: how IT neural responses to objects support human perception of the objects; and how IT responses are produced from retinal images of objects. The goal of this research is to tackle these two related questions and find out explicit, quantitative mechanisms …
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Behavioral Strategies and Neural Mechanisms of Dynamic Foraging
… may be used in the task, it is unclear how neural processing of reward, value and action information might change across different behavioral states. This thesis develops techniques for behavioral and neural dissection of cortical contributions to dynamic foraging behavior. By a combination …
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Psychological and neural mechanisms of stay/leave decision making
… study in which the underlying psychological and neural mechanisms of stay/leave decision making in both a nonsocial and social context were investigated and compared. In Study 1A and 1B participants played a social or nonsocial version of a novel economic game in which participants were dependent …
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Investigating neural mechanisms of hand movements in virtual reality
… the moving hand in response to MVF. However, the neural mechanisms of MVF are still unclear. This Electroencephalography (EEG) study was designed to investigate the timing of neural responses to MVF presented in virtual reality. 16 right-handed, neurologically healthy subjects participated in a …
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Neural Mechanisms of Thermoregulation in the Rabbit, Oryctolagus Cuniculus
… this study is to investigate the changes in POAH neural activity during neurotropic agent-induced alterations in thermoregulation.
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Neural Mechanisms Supporting Default Mode Network Regulation of Pain Sensitivity
… are reflected in functional brain activity. The neural mechanisms underlying these inter-individual differences in pain sensitivity are not fully understood, however, recent evidence suggests a possible role for the default mode network (DMN) both in pain and pain sensitivity. The present thesis …
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Neural Mechanisms Promoting Biased Social Memories in Intergenerational Childhood Abuse
… cycles requires the study of social processing mechanisms. This study investigates whether neural and cognitive biases in social processing – specifically, the encoding and recall of social feedback – serve as pathways linking childhood abuse histories to harsh parenting of the next generation. …
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Neural Mechanisms and Behaviors in Models of Conditional Nprl2 Loss
The file named "DENTEL-PRIMARY-2022-1.pdf" is the primary dissertation file. Two (2) supplemental video files are also available and may be viewed individually.
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Molecular and Neural Mechanisms Underlying Courtship Song Evolution in Drosophila
… as a model system to explore the molecular and neural mechanisms underlying species variation in behavior. We investigate the lineage-specific loss of sine song in Drosophila yakuba by comparing the underlying neural circuit across species. I find that the loss of sine song correlates with a …
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ONTOGENY AND NEURAL MECHANISMS OF VOCAL COMMUNICATION IN MUS MUSCULUS
… is ubiquitous across mammals, the brain mechanisms that enable the transition from infant vocalizations to adult vocalizations remain largely unknown. Studying the ontogeny of vocal communication in laboratory mice (Mus musculus) provides a tractable opportunity to begin to understand the …
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Understanding neural mechanisms of strategic learning: correlates, causality, and applications
… the hypothesis of a hybrid EWA process at the neural level, even though it outperforms reinforcement and belief-based learning models behaviorally. Based on these findings, I hypothesized that behavioral choices are a product of a dual-system process at the brain level involving reinforcement …
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Investigating brain-wide neural mechanisms using fMRI and novel tools
Defining the neural mechanisms that coordinate behavior requires characterizing the activity dynamics of diverse brain regions and neural circuit elements. My thesis explores such dynamics to help understand brain-wide processing of rewarding and aversive stimuli relevant to decision making. My …
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