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 82 for “"caudate"”.
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Behavioral Responses to Methylphenidate: Correlations With Neuronal Activity In The Caudate Nucleus
… in DA in the motive circuit, including the caudate nucleus (CN), similar to other drugs of abuse. This study focuses on research aimed to elucidate if there are intrinsic underlying differences in the CN electrophysiological activity of animals exhibiting different chronic responses to the …
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The Neural Computations In The Caudate Nucleus For Reward-Biased Perceptual Decision-Making
… single-unit extracellular recordings in the caudate nucleus, the input station in the basal ganglia. Fitting the monkeys’ behaviors to a drift-diffusion model, we found that the monkeys used a rational heuristic to combine sensory and reward information. This heuristic is suboptimal but leads …
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The Effect of Cholecystokinin Antagonist Lorglumide on Dopamine Levels in the Rat Caudate
… with slow wave depolarization (SWD) in the rat caudate (CPu). Failure to elicit KC1-induced DA signals following lorglumide treatment may be due to a CCK-DA interaction. This possibility was investigated in this study using both turnover estimates and microdialysis to evaluate the effects of …
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Effects of frontal cortex and caudate nucleus lesions on stimulus generalization learning in rats
… median cortex (AM) described by Leonard, and the caudate nucleus (CN) on a brightness stimulus generalization task. It was hypothesized that deficits in stimulus generalization learning would be demonstrated by rats who received the AM and CN lesions, and that no deficits would be shown by FP …
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Studies into Amphetamine-Induced Unconditioned Behaviour in the Rat.
… have been adopted as a model of raised caudate-putameri function whilst locomotion has been adopted as a model of raised mesolimbic dopamine function. These models have been used to study drugs which are effective in the treatment of schizophrenia. Only locomotion is reliably antagonised …
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Preliminary evidence that prenatal maternal choline supplementation protects the white matter microstructure of infants born to heavy-drinking women
… confounders, FA in the WM connection between the caudate and pallidum on the left was lower in the choline group (p = 0.023) and on the right was inversely associated with choline dose – both in % packets consumed (β (ε) = -0.55 (0.20); p = 0.016) and in grams (β (ε) = -0.51 (0.20); p = 0.024). …
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Survey and Comparison of Amphibian Assemblages in Two Physiographic Regions of Northeast Tennessee.
… period (February 1999 to May 2000).</p> <p>Nine caudate (Plethodontidae) and one anuran species (Ranidae) were found in John's Bog. Seven caudate (Ambystomatidae, Plethodontidae, Salamandridae) and five anuran species (Hylidae, Ranidae) were found in Henderson Wetland. Assemblages were compared …
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A New Device for Stereotactic ct-Guided Biopsy of the Canine Brain: Design, Construction, and Needle Placement Accuracy
… for reasons unrelated to the brain. Deep-seated (caudate nucleus and pituitary gland) targets were identified on CT. After a 5 mm craniotomy, the biopsy needle, with CT monitoring, was progressively introduced into the target. The final needle track distance was measured on CT. The brain was …
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AUTORADIOGRAPHIC STUDIES OF THE REGULATION OF THE SUBTYPES OF THE ß ADRENERGIC RECEPTOR
… The density of ß-1 adrenergic receptors in the caudate-putamen increased after this treatment. The density of ß-1 receptors did not change in the caudate-putamen following the nonselective lesion. A selective lesion of the dopaminergic input to the caudate-putamen resulted in a decrease in the …
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The impact of maternal HIV infection on uninfected neonate brain structure
… neonates demonstrated significantly reduced mean caudate volumes bilaterally and left mean putamen volumes relative to HUU neonates. Further analysis revealed the observed differences in basal nuclei volumes were related to duration of ART in utero. Infants exposed to ART throughout pregnancy had …
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High-Definition Fiber Tracking Study of the Executive Control Network in Blast-Related Traumatic Brain Injury
… prefrontal cortex (DLFPC) and the putamen, caudate, and thalamus. Groups had similar demographic characteristics, and medical histories. Relative to the comparison group, moderate to strong effects indicated that bTBI was associated with: elevated quantitative anisotropy (QA) and reduced …
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Functionally relevant basal ganglia subdivisions in first-episode schizophrenia
… matter) volumes were obtained for the caudate, putamen, and globus pallidus. For the striatum (caudate and putamen), total and segmented volumes were obtained for their respective sub-regions. These sub-regions were restructured into associative, limbic, and sensorimotor subdivisions. …
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The Neural Computation of Trust and Reputation
… estimates of RL models within the bilateral caudate nuclei. However, our work additionally showed that this correlation was modified when reputational priors on counterparts are provided. Indeed participants continued to rely on priors even when experience shed doubt on their accuracy. …
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Are maternal symptoms of depression/PTSD and Child Genetic risk scores for depression/PTSD associated with childhood subcortical brain volumes?
… Model GxE was associated with larger bilateral caudate volume. For PTSD, model G was associated with larger total and right putamen and right pallidum volume, and with smaller left putamen and left hippocampus volume. Model G+E was associated with larger total thalamus and right thalamus …
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Effects of Δ9-Tetrahydrocannabinol on Neural Reward Anticipation Among Young Adult Cannabis Users
… interest (ROIs): the nucleus accumbens (NAcc), caudate, and putamen. Multiple linear regressions examined the relationship between problematic cannabis use and reward anticipation under the PBO condition (Aim 1). Repeated-measures analyses of covariance (RM-ANCOVAs) tested main and interactive …
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Effetto dell’esposizione cronica volontaria di eroina e WIN55,212-2 sull’espressione di micro RNA nelle aree cerebrali coinvolte nella dipendenza da sostanze d’abuso
… 17 downregulated; 125 miRNAs dysregulated in the caudate putamen: 105 upregulated and 20 downregulated and 51 miRNAs dysregulated in the prefrontal cortex, 39 upregulated and 12 downregulated. Following WIN55,212-2 SA we observed that 95 miRNAs were differentially expressed in NAc shell: 40 …
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Evaluation of age differences in locomotor activity following psychostimulant administration in adolescent versus adult mice
… greater levels of Fos expression in the dorsal caudate as compared to adults. This posed the question of how greater Fos expression could relate to relatively lower locomotor stimulation in adolescents. Chapter 5 attempts to answer this question by examining the hypothesis that adolescents …
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Automatic segmentation of magnetic resonance images of the brain
… segmentations of the lateral ventricles and the caudate nuclei were compared to reference manual segmentations done by expert radiologists. The Tanimoto similarity coefficient was very good for the lateral ventricles (0.81) and good for the caudate nuclei (0.67).
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Changes in Activation During Production of Syllables from a Second Language
… in the left superior cerebellum and right caudate (p<.05 FWE) for the final training phase. The results support recent speech production studies that showed activation of the cerebellum and caudate play a role in the production of more complex or novel stimuli. The behavioral and fMRI …
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Effects of HIV on longitudinal development of the fronto-striatal resting state networks in children from 7 to 11 years
… The BG seeds comprised the bilateral putamen, caudate, globus pallidus (GP) and thalamus. Functional regions located in the dorsolateral prefrontal cortex (DLPFC), paracentral lobule and pars opercularis were chosen as frontal ROIs because of their association with executive, motor and language …
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