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 172 for “"midbrain"”.
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Information processing in a midbrain visual pathway
… interactions between neurons. We investigated a midbrain visual pathway: optic tectum and its isthmic nucleus) that is motion sensitive and is thought as part of attentional system. We determined the physiological properties of individual neurons as well as their synaptic connections with …
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FUNCTIONAL ROLES OF MIDBRAIN DOPAMINE NEURONS IN ASSOCIATIVE LEARNING
Dopamine signaling is thought to play a critical role in reward-related learning, and the predominant hypothesis proposes that dopamine neurons signal the expected reward values of sensory stimuli in the form of a short-latency phasic burst. Thus, the reward prediction hypothesis assumes that …
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The midbrain reticular formation in flexible visual decision-making
… in the frontal cortex, basal ganglia, and midbrain. However, the precise regions involved and their computations remain unclear. Previous work has found that a large and poorly understood structure of the midbrain, the midbrain reticular formation (MRF), contains similar task activity …
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Stimulus Integration and Parsing in the Primate Auditory Midbrain
… the main avenue for improvement for the auditory midbrain implant suggested by our findings is to increase the number and spatial extent of electrodes, to increase the size of the region that can be electrically activated and provide a greater range of evoked percepts.</p><p>My next line of …
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Response properties of neighboring neurons in the auditory midbrain
… the primary nucleus in the mammalian auditory midbrain, occupies a central position in the ascending auditory pathway. Nearly all ascending neural pathways converge and synapse in the central nucleus of the inferior colliculus (ICC). Further, the anatomical arrangement of axons and neurons in …
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Informing the next generation of auditory midbrain implants, neuronal population dynamics in the auditory cortex and midbrain, and the potentials of optogenetic stimulation
The performance of current generation central auditory neuroprosthetics lags behind the cochlear implant. As these new devices utilise speech processing algorithms based on the cochlea, more information may be required regarding the neuronal population activity of potential prosthetic sites, in …
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Binaural information processing in the auditory midbrain of the grassfrog
Contains fulltext : mmubn000001_111825105.pdf (Publisher’s version ) (Open Access)
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Neuromeric organization of the midbrain-hindbrain boundary region in zebrafish
… is still scarce. The focus of this study is the midbrain-hindbrain boundary (mhb) region, where the juxtaposition of the mesencephalon and metencephalon gives rise to a signaling center, termed the midbrain-hindbrain or isthmic organizer. Evidence for lineage restriction boundaries in the mhb …
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Some nerve tracts of the midbrain of Ictiobus urus (Agassiz)
Made available in DSpace on 2016-11-09T23:47:58Z (GMT). No. of bitstreams: 2 5957512_opt.pdf: 22487707 bytes, checksum: 7c275d4b14f90e4f58147123dcfa013e (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1895
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A midbrain mechanism for computing escape decisions in the mouse
Animals face frequent threats from predators and must generate appropriate behavioural responses to ensure their survival. To achieve this, they process sensory cues to correctly identify the presence and imminence of a predatory threat, and transform this information into defensive actions. …
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Identification and characterization of genes expressed by the midbrain dopaminergic neurons
The midbrain dopaminergic (mDA) neurons are the main source of dopamine in the brain. The goal of this study was to identify and characterize genes effective during the intermediate period between induction and full differentiation of the mDA neurons. The generation of En chimeric animals permitted …
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Some Midbrain Mechanisms of Water and Salt Metabolism in the Rat
Made available in DSpace on 2014-12-03T23:51:21Z (GMT). No. of bitstreams: 1 6303223.pdf: 2020866 bytes, checksum: 67be8f18f83e0173a6f934da99ff6e65 (MD5) Previous issue date: 1962
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Lateral hypothalamic control of motivated behaviors through the midbrain dopamine system
The lateral hypothalamus and ventral tegmental area are two brain regions that have long been known to be involved in processing reward and the control of feeding behaviors. We continue work in this area by identifying the functional connectivity between these two regions, providing evidence that …
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MODELLING GBA1-RELATED PARKINSON¿S DISEASE PATHOLOGY IN PATIENT-DERIVED MIDBRAIN ORGANOIDS
… of the disease. Here, we present an innovative midbrain organoid culture system derived from subjects with GBA1-related Parkinson’s disease and Gaucher’s disease as the first patient-based model able to reproduce fundamental human neuropathological features of these disorders. We provide …
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Measuring the Subjective Value of Effort in Behaviour and Midbrain Dopamine Neurons
… time. Other work has demonstrated pathologies of midbrain dopamine neurons and drugs that target dopaminergic signalling affect the willingness to expend effort. However, it is not clear from previous studies how effort disutility is represented in the reward prediction error signal. To resolve …
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A role for hippocampal and midbrain neural processing in context-dependent spatial memory
The ability to discriminate contextual situations is central for organisms to predict events and the outcome of behavior. This function is thought to be the byproduct of an allocentric spatial reference framework generated by the hippocampus. It is commonly assumed that hippocampal place cells …
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Effects of sound direction on spectral and temporal processing in the frog midbrain
The effects of sound direction on two aspects of signal processing, spectral and temporal processing, were investigated by single-unit extracellular recording from the frog inferior colliculus (IC). The neural activities were evaluated from 3 to 5 sound directions within 180$\sp\circ$ of frontal …
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Binaural interactions in the auditory midbrain with bilateral electric stimulation of the cochlea
… (IC), the main nucleus of the auditory midbrain, were studied using electric stimulation of bilaterally implanted intracochlear electrode arrays. Neural tuning to interaural timing difference (ITD) was emphasized since it is an important binaural cue and is well represented in IC neural …
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