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 21 for “"posterior cingulate cortex"”.
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The Neurobiology of Social Cognition: Role of the Posterior Cingulate Cortex
… the neural circuitry for social cognition. The posterior cingulate (PCC) is believed to be a key node in both the DMN and in social cognition. Human and non-human primate studies have demonstrated a role for the PCC in outcome monitoring: it tracks rewards, subjective values of choices, task …
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Heading Disorientation in Amnestic Mild Cognitive Impairment is Correlated with Hypometabolism in the Posterior Cingulate Cortex
… with hypometabolism in bilateral precuneus, posterior cingulate gyri, right crus cerebelli, cerebellar vermis, right anterior and middle cingulate gyri, right superior and middle frontal gyri, left inferior parietal region, and the left angular gyrus. (uncorrected p<0.05). Decrease in scores …
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Neurobiology of Learning and Valuation
… is a crucial goal. One brain region, the posterior cingulate cortex (CGp), a central hub within the default mode network, is prominently dysregulated in Alzheimer's Disease and schizophrenia. Despite its clinical importance, the posterior cingulate cortex remains an enigmatic nexus of …
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Hippocampal modulation of cingulate cortex and limbic thalamus during learning
… found in rabbits with the combined lesions of posterior cingulate cortex and subiculum in Experiment 1 as after the separate lesions in a previous study (Gabriel et al, 1987). The frequency of CR was also greater in rabbits with the combined lesions during early training. This result suggests …
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Closer look at the fMRI data analysis pipeline and its application in anesthesia resting state experiment
… (LC) in the brainstem and the Thalamus & Posterior Cingulate Cortex (PCC) is the neural correlates of the Dexmedetomidine-induced unconsciousness.
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Delay Discounting in At-Risk Preadolescents: Brain Mechanisms and Behavior
… were identified, there were group differences in posterior cingulate cortex (PCC) function during decision making. Specifically, the high-risk group showed stronger deactivation of the PCC than healthy controls. These results suggest that high-risk preadolescents may need to suppress activity of …
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Brainstem cholinergic modulation of the limbic learning circuit
… (anterior and medial dorsal) thalamic nuclei and cingulate cortex as rabbits learned to locomote after a foot-shock predictive tone (CS+) and to ignore another tone (CS$-$) not predictive of shock (Gabriel et al., Behav. Brain Res., 1991, 46, 175-185). This study examined a role of cholinergic …
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The role of the default mode network in contextual control
… to arbitrary letter stimuli. DMN regions of the posterior cingulate cortex, parahippocampus and posterior inferior parietal cortex are found to show increased activity during decision making in the lifelike context only. Chapter 3 asks whether regions beyond the ‘task-positive’ multiple demand …
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Neural Mechanisms Promoting Biased Social Memories in Intergenerational Childhood Abuse
… hippocampus, putamen, amygdala, dorsal anterior cingulate cortex (dACC), posterior cingulate cortex (PCC), and medial prefrontal cortex (mPFC) appeared to potentiate the link between childhood abuse and harsh parenting, whereas heightened sensitivity in these regions to positive feedback appeared …
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Functional Connectivity of the Posterior Cingulate in Mild Cognitive Impairment and Alzheimer's Disease
… suggest that reduced connectivity between the posterior cingulate cortex (PCC) and associated brain regions may make an important contribution in this regard, as changes in the PCC/precuneus and entorhinal cortex are implicated as early biomarkers for AD. The current study used functional …
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Neural basis of private and social decision-making: new insights from transcranial ultrasound stimulation and multivariate analysis
… (TUS). We found that the rostromedial prefrontal cortex (rmPFC) is involved in the integration of decision variables and that the precuneus/posterior cingulate cortex (PCC) is involved in the anticipation of regret, but not in its experience. We also found that social comparison is supported only …
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Baseline cortical activation to food pictures associated with change in weight, hunger, cognitive restraint, and disinhibition following bariatric surgery
… middle, medial superior prefrontal cortex (PFC))would be associated with changes in weight, hunger, cognitive restraint, and disinhibition. Methods: 18 participants viewed food and non-food pictures from a well-established food motivation paradigm during an fMRI scanning session …
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Vascular Risk, Functional Connectivity, and Episodic Memory in Older Adults
… 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 risk may be an …
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NEUROANATOMICAL CORRELATES OF AUTISM SPECTRUM DISORDER AND THEIR CORRELATION WITH CLINICAL FEATURES A MULTICENTRIC MRI STUDY.
… increased area in the left medial orbitofrontal cortex than control group, whereas no significant cortical volume (CV) differences between ASD patients and controls were observed. ASD patients were characterized by significantly increased cortical thickness in the left superior temporal cortex. A …
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Cerebrovascular dysfunction : associations with midlife risk factors
… connectivity between the medial prefrontal cortex and posterior cingulate cortex, and that neither physical fitness nor physical activity status moderated this association. This suggests that there is a threshold at which elevations in metabolic factors influence connectivity. For the last …
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Oxygen Polarography in the Awake Macaque: Bridging BOLD fMRI and Electrophysiology
… and representative of stimulus driven sensory cortex, we show increased tissue oxygen and local field potential power in response to visual stimulus. In area 23 of the posterior cingulate cortex (PCC), a hub of the default-mode network we show decreased oxygen and local field potential in …
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Integrating Psychology and Neuroscience Approaches to Optimize Physical Activity Behavior Change
… in the frontal pole region and the precuneus/posterior cingulate gyrus region. The frontopolar cortex is implicated in pre-commitment, a self-control strategy where people anticipate self-control failures and prospectively restrict their access to tempting alternatives. The precuneus/posterior …
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The neural correlates of Human Spatial Memory and Representation
… spatial coding while more dorsal regions and the posterior cingulate cortex are suggested to underlie integration and translation. This thesis details experiments which are amongst the first to use EEG to probe spatial memory in such detail as to expose electrophysiological differences between …
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Blushing and gaze avoidance in social anxiety disorder : a structural neuroanatomical investigation
… parietal lobe b (p=0.04) and left occipital cortex a (p<0.01) were decreased. With increased gaze fear and avoidance, there were associated decreases in the right posterior cingulate cortex a (p<0.01), right occipital lobe b (p=0.03) and right fusiform gyrus a (p<0.01). Increased blushing and …
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Where Does it Stem From? - Functional Neuroimaging of Monoaminergic Brainstem Nuclei in Altered States of Consciousness: Translational, Diagnostic and Therapeutic Implications
… from the main node of the DMN in the precuneus/posterior cingulate cortex, revealing a connectivity impairment universal to both ASCs. The extent of this VTA connectivity impairment was associated with DMN disconnectivity, as well as behaviour and/or outcome measures. Furthermore, I found that …
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