View clinical trials related to Sleep Deprivation.
Filter by:Background The emergency department is a chaotic place with high levels of noise and light 24 hours a day. Patients are often boarded overnight while they await tests or consultations scheduled for the morning. Sleep deprivation, high noise levels have been associated with negative patient experiences and outcomes in other clinical settings. Interventions to counter the effects of noise and light in the emergency department for patients staying overnight have not been investigated. Objective To determine if sleep and other aspects of the patient experience can be improved for patients boarded overnight in the Emergency Department with the use of a sleep mask and ear plugs. Methods A randomized control study will take place in the Emergency Department of Kingston General Hospital. Eligible patients will randomized to receive either sleep aids (sleep mask and ear plugs) or standard treatment (no sleep aids). The primary outcome will be sleep quality, assessed by Richards-Campbell Sleep Questionnaire. Secondary outcomes include patient satisfaction, hours of sleep, blood pressure, heart rate, new-onset delirium, patient's sense of feeling well-rested and patient overall sense of well-being. The primary analysis will be intention-to-treat comparing primary and secondary outcomes between the two groups in an unadjusted fashion. A secondary analysis will involve linear regression to explore the association between treatment group and Richards-Campbell Sleep Score, controlling for potential confounders. Importance Determining the feasibility and efficacy of sleep masks and earplugs for patients in the emergency department to improve sleep and the patient experience has never been done before. If found to be effective, this relatively low- cost intervention could be implemented in emergency departments across the country and around the world.
Fifty healthy, young participants (10 male, 40 female) completed two 3-hour study sessions that were at least five days apart. The first session was a baseline. The sleep intervention took place on the night prior to Session 2, where the amount of time in bed was manipulated to be 60-130% of the individual's habitual sleep time. Within both sessions, subjective (Stanford Sleepiness Scale, SSS) and objective (Psychomotor Vigilance Test, PVT) alertness were measured. During the middle of each session, a 40-minute ad libitum meal opportunity allowed participants to eat from eight different food items. Food healthfulness, caloric density, distribution and number of calories were measured and compared to alertness levels.
Objectives: investigate the effects of 6 nights of sleep extension on physical and cognitive performances before, during total sleep deprivation (39 hours continuous awaking) and after a subsequent recovery sleep. Design: Subjects participated in two experimental conditions (randomized cross-over design): extended sleep (10-h in bed, EXT) and habitual sleep (8-h in bed, HAB). In each condition, subjects performed two consecutive phases: (1) six nights of either EXT or HAB (2) three experiments days in-laboratory:baseline (BASE), sleep deprivation (TSD) and after 10 h of recovery sleep(REC). Performance tests were administered every 3 hours over the 3-d in laboratory. Setting: This cross-over and randomized study was conducted under standardized laboratory conditions with continuous polysomnographic recording Participants: 14 healthy men (age range: 26-37 years) participated in the study. Interventions: EXT vs. HAB sleep durations prior to total sleep deprivation (39 hr continuous awaking).
The investigators examine changes in decision making, vigilance and cortical excitability in healthy male subjects undergoing total acute sleep deprivation (40 hours) on the one hand, and chronic partial sleep restriction (7 nights with 5 instead of 8 hours in bed per night) on the other hand, in a cross over controlled manner. The investigators hypothesize that total sleep deprivation, as well as partial sleep restriction lead to impairments in decision making and vigilance, and enhanced cortical excitability. Beside these three primary outcomes, the investigators also assess changes in sleep by EEG, dim light melatonin onset, skin temperature, subjective mood and sleepiness, working memory, and also collect saliva samples.
Insufficient sleep is common, affecting 20-40% of adults, and resulting from sleep disorders, medical conditions, work demands, stress/emotional distress, and social/domestic responsibilities. It produces significant social, financial and health-related costs, and it has increasingly become a major public health concern as population studies worldwide have found that reduced sleep duration is associated with increased risks of obesity, morbidity, and mortality. It is well established that sleep loss causes fatigue and sleepiness, as well as errors and accidents that are due to its adverse neurobehavioral effects on alertness, mood, and cognitive functions. However, there are substantial, trait-like differences among people in the extent to which they experience such neurobehavioral deficits when sleep deprived. Common genetic variations involved in sleep-wake, circadian, and cognitive regulation may underlie these large inter-individual differences in neurobehavioral vulnerability to sleep deprivation, though it remains unclear whether different types of sleep deprivation involve the same phenotypic responses and same genotypic contributors. This project will be the first large-scale investigation of markers of differential cognitive vulnerability to both acute total sleep loss and chronic partial sleep loss. It will identify individuals who are at significant risk for fatigue and severe impairments from sleep loss. A total of 110 healthy adults will undergo a 13-day laboratory protocol to thoroughly characterize their cognitive, psychological and physiological responses to two of the most common forms of sleep loss--acute total sleep deprivation (1 night of sleep loss) and chronic partial sleep deprivation (5 nights of sleep limited to 4 hr). The findings from this study will represent a critical first step toward tailoring appropriate follow-up interventions for sleep loss and its symptomatic relief by finding predictors of at-risk individuals who should avoid sleep loss whenever possible, and/or seek effective countermeasures. Whether or not markers of neurobehavioral vulnerability to sleep loss are identified, the results of the project will help inform public policies pertaining to the need for adequate sleep and for countermeasures for sleep loss, and also will further our understanding and management of vulnerability to excessive sleepiness due to common sleep and medical disorders.
This project continues an innovative line of research on how to optimally use sleep as an intervention to promote cognitive recovery from, and resistance to, the neurobehavioral risks posed by chronic partial sleep deprivation. Chronic insufficient sleep is estimated to affect at least 20% of adults. It can result from medical conditions and sleep disorders, as well as work demands, and social or domestic responsibilities. It is associated with significant clinical morbidity, and directly causes errors and accidents that are due to its adverse neurobehavioral effects on alertness, mood, and cognitive functions. In seminal experiments conducted under this grant, we showed that the neurobehavioral effects of chronic sleep restriction accumulate to severe levels in a few days, without the full awareness of the affected individuals, and that recovery from chronic sleep restriction requires more sleep than previously assumed. We also discovered that recovery from chronic sleep was illusory, because it masked a heightened neurobehavioral vulnerability to even a single post-recovery night of sleep restriction. The implications of these findings are that apparent recovery from chronic sleep restriction masks a more severe cognitive response to subsequent sleep restriction suggesting that there are longer time constants in the brain for neurobehavioral recovery from chronic sleep restriction. In light of this finding, we now seek to determine whether additional nights of extended recovery sleep will reduce the heightened vulnerability induced by prior exposure to sleep restriction. A total of 87 healthy adults (ages 21-50) will be studied in the laboratory during a 17-night (N=63) and a 19-night (N=24) protocol evaluating cognitive, psychological and physiological responses to varying recovery days between two sleep-restriction periods. The results will establish the number of nights of recovery sleep needed to prevent accelerated deterioration during a subsequent period of sleep restriction. The findings will advance theoretical understanding of sleep homeostasis and its relationship to cognitive functions, as well as inform theories of sleep need, and have substantial implications for sleep biology, for the treatment of clinical disorders that regularly disrupt sleep, and for managing lifestyle factors that frequently restrict sleep.
Although the effects of acute alcohol intake and sleep deprivation on exercise performance lacks evidence in the literature, in many situations, they occur simultaneously. Once the alcohol affects physiological processes, the processes that occur during sleep can be impaired, such as: suppression of GH release, action of neurotransmitters and neuromodulators in the CNS, changes in the proportion of sleep stages and may lead to suppression of REM sleep. These changes promote a significant functional impairment such as a reduction in alertness and modification in reaction time, which affects the performance of any activity of daily and professional life. However, the combined effects on the physical performance variables, such as aerobic and neuromuscular performance lack of evidence in the literature.
The purpose of this study is to change the concentration of amyloid-beta in human cerebrospinal fluid (CSF) through modulation of the sleep-wake cycle.
Tear film consists of three layers including outer lipid layer, aqueous layer and inner mucin layer.1,2 Lipid layer protects the aqueous layer of tear film from evaporation and mucin layer adhere the tear film to ocular surface. Aqueous layer, which is produced in lacrimal glands, is the most important in the health of ocular surface. Reduction of aqueous tear secretion results in the disruption of homeostasis at ocular surface and leads to dry eye syndrome.2 Dry eye syndrome is a common ocular surface disease associated with symptoms of eye discomfort, grittness and visual disturbance.1,2 Dry eye syndrome disrupts normal homeostasis at the ocular surface resulting in epithelial damage, epithelial cell apoptosis, loss of goblet cells, and squamous metaplasia.1-3 The changes and inflammation of ocular surface subsequently lead to tear instability, which causes an increased tear osmolarity and aggravates the inflammatory cascades. This leads to a vicious cycle.2 The regulation of tear film secretion is under neural and hormonal control.4 Dry eye syndrome has been associated with diverse and multiple causes, including depressive disorder, drugs, hormonal status, and systemic diseases.2 Sleep deprivation (SD) is known to cause profound impair¬ments in executive function and vigilant attention.5,6 It is also reportedly associated with autonomic and endocrine functioning7-9 and has been shown to increase blood pressure and stress hormone levels and decrease parasympathetic tone.10,11 Tear secretion is regulated by neurological factors and hormones,12 and so SD may have an effect on the tear film and ocular surface. However, only a few studies have evaluated the effect of sleep on the tear film and ocular surface. In this study, we investigated the effect of SD on the tear film and ocular surface.
The main purpose of this study is to investigate the effects of partial sleep deprivation (PSD) on resting state brain connectivity, emotional contagion, empathy, and emotional regulation.