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 10 of 10 for “"Slow Oscillations"”.
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Investigation of slow oscillations in blood pressure
… in this loop, are thought to give rise to a slow limit cycle oscillation in blood pressure at 0.1 Hz in the human. Measurement of the strength of this slow oscillation has been proposed as the basis for the development of a diagnostic test of cardiovascular dysfunction or disease. Due to this …
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Cellular and Circuit Properties of Slow Oscillations In The Thalamic Reticular Nucleus
… of sleep spindles, the mechanisms regulating slow (<1 >Hz) forms of thalamic oscillations are poorly understood. Under <em>in vitro</em> conditions, in the absence of synaptic inputs, TRN neurons can generate slow oscillations in a cell-intrinsic manner. Activation of postsynaptic Group 1 …
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Spatio-temporal dynamics of spontaneous neural activity during the transition from slow oscillations to an awake-like state in isolated cortical networks
Slow oscillations (SO) of neural activity occur spontaneously in the neocortex during functionally disconnected brain states, such as deep anaesthesia or slow-wave sleep. These consist in a near-1-Hz alternation of high- (Up) and low-responsive (Down) periods, and spatially propagate as a …
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Statistical Modeling of Disrupted Sensory Processing during Propofol Mediated Unconsciousness
… the most widely used anesthetic agent, induces 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 …
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Brain states and circuit mechanisms underlying sleep and general anesthesia
… is associated with the abrupt onset of slow oscillations that disrupt cortical networks. I then demonstrate that activation of the thalamic reticular nucleus generates slow wave activity and decreases arousal state, identifying a causal mechanism that generates physiological and …
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The effects of cholinergic and dopaminergic neurons on hippocampal learning and memory processes
… optogenetic cholinergic activation suppressed slow oscillations, shifting brain activity to a state dominated by theta and gamma oscillations. In contrast, dopaminergic activation suppressed gamma oscillations. Second, to directly probe the effects of neuromodulation on different stages of …
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A towed submersible
… instabilities are damped out during the long, slow oscillations, whereas for a device with a much shorter wave period such local perturbations crucially affect the performance. A device with a relatively short undulation period for intense data collection would be a major advance in …
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A towed submersible
… instabilities are damped out during the long, slow oscillations, whereas for a device with a much shorter wave period such local perturbations crucially affect the performance. A device with a relatively short undulation period for intense data collection would be a major advance in …
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Investigation and Modelling of Fetal Sheep Maturation
… and late third-trimester with well-defined SWS (slow wave sleep) and REM (rapid eye movement) sleep states. For the late third-trimester, the results of power, correlation time, and SVD (singular value decomposition) entropy analysis demonstrate that the sleep state change is a cortical phase …
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Analysis of very low frequency oscillations in electromagnetic brain signal recordings
Spontaneous very low frequency oscillations (<0.5 Hz), previously regarded as physiological noise, have of late been increasingly analysed in neuroimaging studies. These slow oscillations, which occur within widely distributed neuroanatomical systems and are unrelated to cardiac and respiratory …