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.
Results
Showing 1 to 20 of 24 for “"Slow Wave Sleep"”.
-
NREM sleep spindles and slow wave sleep in younger and elderly women: an investigation of their influence on declarative memory consolidation
Previous research shows that slow wave sleep (SWS) and sleep spindles play an essential role in declarative memory consolidation. However, this role is not well understood in the ageing women. With advancing age, SWS and sleep spindles undergo significant decreases in duration and density, while …
-
Designing a Smartwatch App for Automated Targeted Memory Reactivation
… learning and reintroducing these stimuli during slow-wave sleep. This process aids in memory consolidation, where recent neural representations are reactivated and transferred to long-term storage. Traditionally, TMR has been limited to laboratory settings. For my thesis, I developed a TMR system …
-
Combinatorial analysis of sequential firing patterns across multiple neurons decoding memory of sequential spatial experience in rat hippocampus
… spatial experience in the rat hippocampus during slow wave sleep. Specificaly, rats are trained to repeatedly run through a sequence of spatial receptive fields ("place fields") of hippocampal CA1 "place cells" in a fixed temporal order. The spiking activity of many such individual cells is …
-
Sleep/wakefulness versus urethane anesthesia: analogous arousal states for respiratory control?
… superficially appear like waking (W), light sleep (LS) and slow-wave sleep (SWS) in the unanesthetized animal, referred to as States I, II and DI, respectively. The major question in this thesis was whether the urethane anesthetic states are analogous to the natural states with similar EEG …
-
Techniques for the Collection and Assay of Sleep Promotion Factor in Exercised and Sleep Deprived Dogs
… The Pieron Phenomenon is the production of sleep in fully rested animals after a ventricular infusion of cerebrospinal fluid (CSF) from sleep deprived animals. According to the humoral theory of sleep, this is caused by the presentation of some sleep promoting substance (factor S) which …
-
Coupled Correlates of Attention and Consciousness
… models of consciousness suggest that both slow wave sleep and Propofol-induced unconsciousness lie at one end of the consciousness spectrum, while attentive states lie at the other end. Accordingly, investigating the electrophysiology underlying attention and the extremes of consciousness …
-
Mnemonic information in the rodent hippocampus during wake and sleep states
… during spatial locomotor tasks and periods of sleep. The first experiment examined the effect of differential reinforcement on the hippocampal representation of space, as mediated by the spatial receptive fields, or place fields, of hippocampal pyramidal neurons. We show that there is a bias in …
-
Optogenetic investigation of normal and pathological rhythms in the hippocampal formation
… oscillatory patterns, the high frequency sharp-wave ripple oscillation thought to be involved in the long term storage of memories, and the high amplitude pathological oscillations associated with epileptic seizure. Hippocampal sharp-wave ripples are observed in CA1 during inactivity and …
-
Sleep, Memory, and Aging: Effects of Pre- and Post-Sleep Delays and Interference on Memory in Younger and Older Adults
… research investigated the relationship between sleep and memory in younger and older adults. Previous research has demonstrated that during the deep sleep stage: i.e., slow wave sleep), recently learned memories are reactivated and consolidated in younger adults. However, little research has …
-
Interactions between anterior thalamus and hippocampus during different behavioral states in the rat by Héctor Penagos.
… occurs during periods of awake immobility, slow wave sleep (SWS) and rapid eye movement sleep (REM). Despite its close functional and anatomical association with the hippocampus, whether or how activity in the anterior thalamus is related to activity in the hippocampus during behavioral …
-
An Investigation of Sleep Architecture and Consequent Cognitive Changes in Olanzapine Treated Patients with Depression
… the effect of olanzapine augmentation therapy on sleep architecture, specifically slow wave sleep (SWS), in the treatment of depression. Secondarily, to determine the effect of olanzapine augmentation therapy on illness severity and cognitive function. Finally, to examine the correlation between …
-
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 …
-
EEG theta oscillations during sleep deprivation
… been found in the near-opposite conditions of sleepiness and alert cognitive control. Most neuroscience research fo-cuses exclusively on the latter, leaving this paradox unresolved. With this thesis, I focus instead on the-ta during sleep deprivation (sdTheta), which has been hypothesized to …
-
Examining Relations among Sleep, Slow Wave Variables, and Next-day Emotional Processing in School-age Children
Introduction: Sleep is critical to children’s daytime functioning, and inadequate sleep in childhood is known to forecast the development of psychological and behavioral problems. A proposed mechanism underlying these relationships is emotional processing. The majority of studies have examined …
-
Associations between sleep architecture, cortisol concentrations, cognitive performance, and quality of life in patients with Addison's disease
… that there are mechanistic relations between sleep disruption and cognitive (particularly memory) deficits, and that varying concentrations of the hormone cortisol may play a particularly important role in mediating those relations. Because patients with Addison’s disease (AD) experience …
-
Granular retrosplenial cortex layer 2/3 generates high frequency oscillation events coupled with hippocampal sharp wave-ripples and Str. LM high gamma
… these processes take the form of theta and sharp wave ripples (SPW-Rs) for encoding and consolidation, respectively. As an animal runs through an environment, neurons become active at specific locations in the environment (place cells) increasing their firing rate, functionally representing these …
-
The relationship between elevated night-time Glucocorticoid activity and dreaming: a perspective on sleep-dependent memory consolidation
… levels, both during wakefulness and during sleep. Corticosteroid exposure is associated with changes in endogenous glucocorticoid activity, sleep disruption, episodic memory impairment, and reduced hippocampal volume. This dissertation had two primary aims. The first was to explore the …
-
Investigation and Modelling of Fetal Sheep Maturation
… these models to generate the discontinuous EEG waves in the immature cortex. Visual inspection of the ECoG time-series shows that the third-trimester of fetal sheep is comprised of two stages: early third-trimester characterised by bursting activity separated by silent intervals, and late …
-
Effects of Restraint Stress on Sleep in the Mouse.
… effects of repeated restraint stress on awake, slow-wave sleep (SWS), rapid-eye-movement (REM) sleep and total sleep time (TST) in the mouse. In contrast to the anecdotal notion that stress uniformly produces insomnia, it was hypothesized that stress induced sleep disruptions would vary as a …
Page 1 of 2