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 58 for “"LFP"”.
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Time-varying phase relationship between spiking neuronal responses and local field potentials in olfactory processing in manduca sexta
… their spiking relative to local field potential (LFP) oscillation phase. Using the sphinx moth, Manduca sexta, as a model system, we tested the predictions of the TOM with regard to the trial-to-trial consistency of odor driven oscillations, the phase-locking of action potentials to LFP …
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Organic Template-Assisted Synthesis & Characterization of Active Materials for Li-ion Batteries
… new materials are being sought out. LiFePO4 (LFP) and SnO2 are both good alternatives for the cathode and anode materials in Li-ion batteries. But, to create high-performance batteries, nano-sized carbon-coated particles of LFP and SnO2 are required. The present work attempts to develop a new …
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Simultaneous Behavior Onset Detection and Task Classification for Patients with Parkinson Disease Using Subthalamic Nucleus Local Field Potentials
… is based on recorded Local Field Potentials (LFP) of the Subthalamic nucleus (STN), captured through Deep Brain Stimulation (DBS) process.</p> <p>One main part of this work is dedicated to the research of various properties and features of the STN LFP signals of several patients' behavior …
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Top-Down Control of Lateral Interactions in Visual Cortex
… We found that V1 interactions-both spiking and LFP interactions-showed significant task-dependent changes. The direction of the task-dependent changes observed in LFP interactions, measured by coherence between LFP signals, was dependent on the perceptual strategy used by the animal. Bisection …
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Effects of surface parameters on boiling heat transfer phenomena
… critical heat flux (CHF) and Leidenfrost point (LFP) have been shown successful in previous studies. However, the enhancement mechanisms are not well understood, partly due to many surface parameters being altered at the same time, as in the case for nanofluids. Therefore, the remaining objective …
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Towards Closed-Loop Deep Brain Stimulation: Behavior Recognition from Human STN
… Subthalamic Nucleus (STN) Local field Potential (LFP) is a great candidate signal for the neural feedback, because it can be recorded from the stimulation lead and does not require additional sensors. This thesis proposes novel detection and classification techniques for behavior recognition based …
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The Impact of Early Life Adversity on Mediodorsal Thalamic-Prefrontal Cortex Maturation
… that the pattern of PFC local field potential (LFP) responses to MD train stimulation is developmentally regulated through adolescence and is impacted by ELA exposure. Typically, the pattern of MD-evoked PFC LFP facilitation at 10Hz is dependent on local NMDAR whereas the LFP suppression at 20Hz …
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Laser foil printing and surface polishing processes
… metal parts, called Laser Foil Printing (LFP), was proposed and developed in this dissertation. The manufacturing sub-processes comprising the LFP technology were comprehensively studied, which include the laser spot welding of foil, laser raster-scan welding of foil, laser cutting of …
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Statistical Modeling of Disrupted Sensory Processing during Propofol Mediated Unconsciousness
… slow-oscillations in local-field potential (LFP) recordings. Spiking becomes strongly coupled to the phase of the slow-oscillations, creating alternating irregular “Up” and “Down” states of high and low activity, respectively. Although it is well established that these changes in LFP and …
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Spatio-temporal structure of thalamically evoked activity in the barrel cortex
… and the ‘barrel’ cortex. Local field potentials (LFP) and spike activity were recorded in the ‘barrel’ cortex with multi-electrode arrays, while electrical stimulation of the thalamocortical pathway simulated incoming sensory information. <br>Glutamatergic responses to thalamocortical stimulation …
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Cerebellar Coordination of Neuronal and Behavioral Rhythms
… and the interactions of local field potential (LFP) oscillations between the lobulus simplex (LS) in the cerebellum, medial prefrontal cortex (mPFC), and dorsal CA1 (dCA1) using multisite in vivo extracellular recordings in freely moving mice. We compared a mouse model of cerebellar ataxia and …
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Adaptive Detection of Beta Bursts of Local Field Potentials Recorded from Subthalamic Nucleus in Patients with Parkinson’s Disease
… the following years. Local field potentials (LFPs) recorded from deep brain stimulation (DBS) leads placed into the motor territory of the subthalamic nucleus (STN) can be used to investigate the mechanism of PD and allows for further development of new therapeutic strategies. Beta band …
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Design of High-Resolution SAR ADC for Detection of Sub-Cortical Neuron Action Potentials for BMI Applications
… slow, higher-amplitude local field potentials (LFPs) under stringent power and area constraints. This thesis presents the design and simulation of a high-resolution, low-power successive approximation register (SAR) analog-to-digital converter (ADC) tailored for sub-cortical neural signal …
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Molecular mechanisms of floor plate formation and neural patterning in zebrafish
… most vertebrate species a lateral floor plate (LFP) domain adjacent to the MFP has been defined. In higher vertebrates it has been shown that the LFP is located within the p3 domain, which forms V3 interneurons. It is unclear, how different cell types in this domain are organized during early …
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Measuring rate constants and product branching for reactions relevant to combustion and atmospheric chemistry
… such as pyrolysis. Laser flash photolysis (LFP) with molecular beam mass spectrometry (MBMS) offers a compromise between CMB and end-product experiments: the reaction conditions are thermalized but still simple enough that primary products can be quantified with confidence. This thesis …
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State Space Methods Using Biologically-Relevant Generative Models to Analyze Neural Signals
… to identify excitatory-inhibitory balance in the LFP or ECoG, but are not defined in terms of a generative model. Here we present three novel methods that utilize generative models to (1) identify and characterize neural oscillations distinct from broad-band noise (2) apply this oscillatory …
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Non-communicable diseases and economic outcomes in South Africa: a cohort study for the period of 2008-2018
… diseases and labour market participation (LFP) and the effect it has on household income (HHI). Methods: Using the longitudinal data from the National Income Dynamics Study (NIDS) with information on labour force participation, household income and diseases such as high blood pressure, …
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Neural Dynamics in the Developing Piriform Cortex of Awake Rats
… cortex by recording local field potential (LFP) activity in piriform cortex of awake rats during the first three weeks of life (P0-21). At birth, the piriform LFP exhibits respiration and spindle oscillations in response to odor stimuli. Spindle oscillations increase in frequency until they …
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Relationships between lexical proficiency and L2 oral proficiency
… proficiency, the Lexical Frequency Profile (LFP) was employed. Statistical inferences were based on Spearman rank order correlation coefficients and descriptive statistics.^ Results showed that OEPT scores have strong or moderately strong correlations with some indices of lexical proficiency. …
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