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 13 of 13 for “"persistent activity"”.
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PERSISTENT ACTIVITY DURING WORKING MEMORY: MATURATION AND CORTICAL SPECIALIZATION
… questions: First, how do changes in prefrontal activity during adolescence mediate working memory ability? And second, what is the difference of neural activity between prefrontal and posterior parietal neurons in a working memory task? For the first project, we reported behavioral performance …
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Mnemonic Representations of Transient Stimuli and Temporal Sequences in the Rodent Dentate Gyrus In Vitro
… experiments in vivo have highlighted the role of persistent neural activity in several brain regions, including the hippocampus, in encoding information during working memory tasks. However, how that persistent activity arises in vivo is currently unknown. Recently, it was shown in hippocampal …
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TRPM5 Channels Contribute to Persistent Neural Activity and Working Memory
… including schizophrenia, attention deficit hyperactivity disorder, aging, and stress (Birnbaum et al., 2004; Goldman-Rakic, 1992; Goldman-Rakic and Selemon, 1997). Therefore, it is important to understand the neural basis of working memory. During performance of a working memory task, pyramidal …
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Linking dopaminergic physiology to working memory related neural circuitry
… memory is thought to be encoded in the brain by persistent neural activity that outlasts the presentation of a stimulus. Interestingly, patients with schizophrenia, a heritable neurological disorder, perform poorly in working memory tasks that require the retention of a target in space, …
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Variability of Neural Responses in the Lateral Prefrontal Cortex
… of visuospatial working memory is a conspicuous persistent activity throughout a delay period in which the stimulus is absent. The dorsolateral prefrontal cortex has long been implicated as the seat of visuospatial working memory, and undergoes dramatic increases in volume and functional …
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Role of NMDA in the Visual Working Memory of the Macaque Monkey
… of working memory has been identified in the persistent neural activity observed during the memory retention intervals of various behavioral tasks. Computational and cellular physiology has suggested that this persistent activity depends on NMDA receptor activation. Indeed, pharmacological …
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An Examination of the Mechanisms of Neocortical Network Excitability in a Mouse Model of Fragile X Syndrome
… This hyperexcitability is manifest as prolonged persistent activity states, or UP states. UP states are cyclic periods of depolarization that occur synchronously throughout local neocortical neurons. UP states arise from local recurrent connections and are regulated by intrinsic neuronal …
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Spatiotemporal variability of methane ebullition from lake sediments
… methane vents are ephemeral rather than persistent. Laboratory-scale measurements were made in a controlled incubation of reconstituted sediments from the same field site. Image analysis of the 0.14 m2 observation area allowed identification of individual bubble outlets and resolved their …
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The Medial Entorhinal Cortex's role in temporal and working memory : characterization of a mouse lacking synaptic transmission in Medial Entorhinal Cortex Layer III
… a delay, which we propose is supported by known persistent activity in entorhinal neurons. CAl receives input from both entorhinal layer III and CA3. We show that synaptic transmission from CA3 is not required for tone fear memory in the trace paradigm and not required for working memory in the …
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Integrated geophysical studies at Masaya volcano, Nicaragua
… mechanisms responsible for the lasting, cyclic activity at Masaya volcano can lead to a better understanding of persistently degassing volcanoes. This study is greatly enhanced by the integration of dynamic micro-gravity, deformation and gas flux measurements. The acquisition of extended …
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An Exploration of Neural Heterogeneity and its Consequences on Network Dynamics and Neuromodulation
… This heterogeneity has been linked to stable, persistent behaviour, increased information transmission, and effective neural encoding. Importantly, although neural heterogeneity is often regarded as a static property and modelled as a fixed meta-parameter, this is not the case in the brain. …
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Atmospheric water vapour tomography for DInSAR application and effect of volcanic plume on the microwaves
… to extrapolate information about the wet refractivity ?eld. Because of its height and the quite variable weather conditions, the estimation of Mount Etna atmospheric anomalies using GPS measurements have noticeable importance to calibrate the SAR interferograms and to establish the effective …
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Artisan associations and small business development in the "Third" Italy
… paper is that the deliberate, proactive, and persistent support of the CNA, the dominant artisan association in Emilia Romagna with a strong leftist political identity, lies at the heart of the brilliant economic performance of the Emilian small and artisan firms. The association provided …