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 2036 for “"Cortex"”.
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Interactions Between Medical Prefrontal Cortex, Orbitofrontal Cortex and Motor Cortex in Value-based Decision Making
… how different sub-regions of rodent prefrontal cortex contribute to value-based decision making, by comparing neural signals related to animal’s choice, its outcome, and action value in orbitofrontal cortex (OFC) and medial prefrontal cortex (mPFC) of rats performing a dynamic two-armed bandit …
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Auditory Cortex Projections Target the Peripheral Field Representation of Primary Visual Cortex
… to identify projections from auditory to visual cortex and their organization. Retrograde tracer wheat germ agglutinin conjugated to horseradish peroxidase was used to identify the sources of auditory cortical projections to primary visual cortex (areas 17&18) in adult cats. Two groups of animals …
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Anatomical analysis of the feedback projections from extrastriate cortex to area 18 in ferret visual cortex
… inputs to area 18 of ferret visual cerebral cortex. Contrary to feedforward connections, feedback connections are presumed to have a modulatory influence on the responses of lower order neurons providing information already processed. Input from feedback connections can supposedly elicit …
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Circuit Dynamics of Adult Visual Cortex
… assumed that connections in the primary visual cortex (V1) become static after the critical period. Recent studies show, however, that dendritic spines appear and disappear during adulthood in the normal brain. Our first objective was then to determine whether axonal branches and boutons also …
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Fronto-parietal cortex in sequential behaviour
This dissertation investigates the fronto-parietal representation of the structure of organised mental episodes by studying its effect on the representation of cognitive events occurring at various positions within it. The experiments in chapter 2 look at the completion of hierarchically organized …
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Dopaminergic modulation of prefrontal cortex subpopulations
… that dopamine modulates medial prefrontal cortex (mPFC) activity to mediate diverse behavioral functions, the precise circuit computations remain elusive. One potentially unifying theoretical model by which dopamine can modulate functions from working memory to schizophrenia is that …
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The connectivity of the mammalian prefrontal cortex
The fine scale connections of prefrontal cortex (PFC) were investigated in the rat brain, in order to determine organizational properties of PFC pathways which were previously undefined. Neuroanatomical tract tracers (Fluro-Gold, Fluoro-Ruby, Fluoro-Emerald, Biotinylated dextran amines; Fluorescein …
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Executive control in the anterior cingulate cortex
… supports the hypothesis that the prefrontal cortex is critical for executive control. One prefrontal subregion, the anterior cingulate cortex has previously been shown to be active in situations involving high conflict, presentation of salient, distracting stimuli, and error processing, i.e. …
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Prediction of templates in the auditory cortex.
… Verification of spatial location in the auditory cortex was determined by comparing with MRI images. In the first set of stimuli, repetitive ('standard') tones with five selected onset frequencies were randomly embedded in the string of rare ('deviant') tones with randomly varying inter stimulus …
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Modulation of Barrel Cortex Microcircuitry by Serotonin
Contains fulltext : 165625.pdf (Publisher’s version ) (Open Access)
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Binge Alcohol Effects on the Prefrontal Cortex
… by binge alcohol consumption is the frontal cortex, an area important for many functions and decision making of daily life. Loss of prefrontal grey matter resulting from heavy alcohol consumption has been documented, however this volume loss does not appear to be caused by a decrease in the …
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Thalamocortical forward modulation in the auditory cortex
… auditory system such as in the primary auditory cortex. The caveat of conventional two-tone paradigms in testing the neurophysiology of forward masking (i.e., forward suppression) is that tones are processed at every auditory center, meaning the recorded activities do not represent the pure …
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Predictive Novelty Detection in Songbird Auditory Cortex
In order to make sense of complicated sensory landscapes, the brain privileges the processing of novel stimuli. Detecting novelty is therefore a fundamental problem for the brain to solve. And it turns out to be complicated, as stimuli can be completely novel, or just novel relative to certain …
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Characterizing Cortex-Hippocampus Interactions During Language Processing
The role of medial temporal lobe structures, including that of the hippocampus, in language processing, remain largely unknown. In patients with hippocampal damage, language is left largely intact [Vargha-Khadem et al., 1997], suggesting that the hippocampus is likely not necessary for language …
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Target Motion Discrimination with Model Retina and Cortex
Model of a turtle's visual cortex has been developed and successfully used to discriminate di fferent input stimuli to different locations of its lateral geniculate nucleus. Turtle's retina model also shown the capability of discriminating motion targets verifying the biological experimental …
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Influence of Mouse Motor Cortex on Vocal Musculature
… but sparse, projection from the primary motor cortex(M1) to the laryngeal motor neurons in the brainstem, termed the laryngeal motor cortex (LMC); 2) cortical lesions that damage this direct projecting population alter the frequency distribution of vocalizations; and 3) change their vocal …
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High frequency field potentials of the cerebellar cortex
… ganglia and the motor areas of the cerebral cortex. Both somatosensory and the cerebro-cerebral pathways bring in massive amounts of neural information to the cerebellum. The output of the cerebellar cortex projects to various motor cortices as well as down to the spinal cord to make its …
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