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 18 of 18 for “"ventromedial prefrontal cortex"”.
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The Role of the Ventromedial Prefrontal Cortex in Mnemonic Discrimination and Generalization
The ventromedial prefrontal cortex (vmPFC) is involved in generalizing across similar items and events, working with hippocampally mediated processes that discriminate between those items and events at encoding. These complementary processes may, in turn, contribute to confidence signals regarding …
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Primate Ventromedial Prefrontal Cortex and the Physiological and Behavioural Dysfunction Characteristic of Mood and Anxiety Disorders
The heterogeneity intrinsic to the ventromedial prefrontal cortex (vmPFC) is evidenced in both its anatomy and implicated function: vmPFC subregions have roles in positive affect, negative affect and autonomic/endocrine regulation. Whether different subregions serve fundamentally different …
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Individual differences in the frontal-striatal reward network : decision-making and psychiatric disease
… connectivity between the nucleus accumbens and prefrontal executive control regions, including the dorsolateral prefrontal cortex. These findings reveal that the intrinsic strength of the frontal-striatal network is associated with differences in temporal discounting preferences. In the third …
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THE INFLUENCE OF INDIVIDUAL DIFFERENCES ON THE IOWA GAMBLING TASK AND REAL-WORLD DECISION MAKING
… making deficits in patients with damage to the ventromedial prefrontal cortex and has become a clinical diagnostic measure of real world decision-making for vulnerable populations (i.e., substance abusers, gambling addicts, depressives). To date, the research linking the IGT to real world …
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Neural and Behavioral Evidence for a Link Between Mobile Technology Usage and Intertemporal Preference
… from the ventral striatum (vSTR) to the ventromedial prefrontal cortex (vmPFC) and dorsolateral prefrontal cortex (dlPFC), pathways that have been previously implicated as biological markers for individual differences in intertemporal preference. Regression analyses revealed that both …
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Neural correlates of temporal context retrieval
… associated with the hippocampus, parahippocampal cortex, ventromedial prefrontal cortex, retrosplenial cortex, and posterior cingulate, which are consistent with the retrieval of non-temporal context in episodic memory. The results also suggest that temporal context retrieval could rely on …
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Neural Circuitry of Social Valuation
… that social valuation relies on the posterior ventromedial prefrontal cortex (pVMPFC). Extending these findings, I next show that idiosyncratic responses within pVMPFC predict individual differences in complex social decision scenarios (Chapter 3). In addition, I also demonstrate that decisions …
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“Is Butter a Carb?” Neural mechanisms of nutrient-sensing and food reward in the human brain
… midposterior insula and the oral somatosensory cortex, which supports the concept that fat detection occurs through texture. Furthermore, our results highlight the unique role of the orbitofrontal cortex in processing food texture parameters, their subjective perception, and integration to …
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Investigation into the mechanisms of depressive illness
… consistent with the non-imaging literature, the ventromedial prefrontal cortex is most active during emotional experience. The results of the meta-analysis were clearly consistent with this hypothesis. Chapter 4 provides an introduction to neural predictive error signals from the general …
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Reinforcement Learning Describes the Computational and Neural Processes Underlying Flexible Learning of Values and Attentional Selection
… the strength of oscillatory activity in ventromedial prefrontal cortex. In the first project, the RL framework is applied to a feature-based attention task that required macaques to learn the value of stimulus features while ignoring non-relevant information. By comparing different RL …
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Vascular Risk, Functional Connectivity, and Episodic Memory in Older Adults
… autobiographical memory. DMN regions include the ventromedial prefrontal cortex, inferior parietal lobe, hippocampus, and the primary "hub" of this network, the posterior cingulate cortex (PCC). For reasons yet unknown, DMN FC declines in aging, which is associated with memory impairment. Vascular …
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Cortical - Basal Ganglia Circuits: Control of Behaviour and Alcohol Misuse
… neural circuits form and unite to link the cortex with the basal ganglia and thalamus to mediate movement, cognition and behaviour. Previous assertions that the basal ganglia primarily acted to filter cortical information to facilitate motor outputs only have since given way to an …
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Investigating the effects of living with HIV on neural circuits involved in reward processing in adolescents
… ; peak MNI -10.1; 9.1; 0.7) and in the (ventromedial) prefrontal cortex (11,280mm3 ; peak MNI -5.3; 25.9; 41.5). There were no regions where activation increases, for any of our contrasts, were greater in CPHIV than controls, but CPHIV showed smaller activation increases than controls …
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Effects of a Disengagement Intervention on Cognitive Performance in Those with a Mild Head Injury
… symptoms that interfere with everyday life. The ventromedial prefrontal cortex (vmPFC) is especially susceptible during injury and is an important brain region in the context of traumatic brain injury; the vmPFC is responsible for regulating physiological arousal and the neuropathology following …
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Neuroeconomics of Reward Information and Motivation
… 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 information about …
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EXAMINING THE NEUROBIOLOGY OF NON-SUICIDAL SELF-INJURY IN CHILDREN AND ADOLESCENTS: THE ROLE OF REWARD RESPONSIVITY
… and dorsal striatum [VS, DS], anterior cingulate cortex [ACC], orbitofrontal cortex [OFC], ventrolateral and ventromedial prefrontal cortex [vlPFC; vmPFC], and insula) and whole-brain connectivity (utilizing bilateral DS, mPFC, and insula seed ROIs) in youth with and without NSSI. We used two …
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The role of frontal-striatal circuits in instrumental behaviour
… reasons being the homologies that exist for the prefrontal cortex (PFC). A novel touchscreen-based contingency degradation task was developed for the common marmoset monkey, a New World non-human primate. The possible roles of the primate medial PFC (area 32), anterior cingulate cortex (area 24), …
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Functional neuroimaging studies of peripheral inflammation-related depression
… key brain regions sensitive to monetary reward (ventromedial prefrontal cortex, vmPFC; nucleus accumbens, NAc) and punishment (insula) outcomes in all three groups (HC, low CRP depression and high CRP depression). However, there was no significant difference in activation between any two groups. …