View clinical trials related to Sleep Deprivation.
Filter by:Rationale. Sleep loss is a risk factor for cardiovascular events mediated through endothelial dysfunction. Objective. To determine if 7 weeks of exercise training can limit cardiovascular dysfunction induced by total sleep deprivation (TSD) in healthy young men. Methods: 16 subjects will be examined during 40-h TSD, both before and after 7 weeks of interval exercise training. Vasodilatation induced by ACh, insulin and heat (42°C) as well as pulse wave velocity (PWV), blood pressure and heart rate (HR) will be assessed at baseline, during TSD, and after one night of sleep recovery. Biomarkers of endothelial activation, inflammation, and hormones will bemeasured from morning blood samples at 07:00
Alzheimer's Disease (AD) is the most prevalent neurodegenerative disease, manifested as an initial deficit of episodic memory that evolves into a global cognitive and psychosocial dysfunction and which prevalence is increasing around the world. Sleep disturbance is frequent since early stages of the disease and sleep fragmentation had been demonstrated increase the production of amyloid peptide (AB) (main pathological hallmark) in non-demented population. Obstructive Sleep Apnea (OSA), which consist in intermittent hypoxia and sleep fragmentation, is a major health problem with multiple systemic effects and it's very prevalent in AD. However, the influence of this comorbidity on the cognitive evolution of AD patients remains unknown. The investigation of neurobiological markers and sleep recording may reveal potential mechanisms of neurodegeneration and explain the influence of sleep fragmentation and/or hypoxia on cognitive decline. To fill those gaps, investigators will perform a multidisciplinary and translational project to assess the progression of symptoms in AD patients, diagnosis of sleep disturbance and new biomarkers of progression of the disease. The present proposal is going to be developed by coordination of different expertises that will be range from the clinical research conducted by a medical neurologist, to the animal model and most molecular work, to be done by an experimented group in mouse work.
The goal of this proposed research is to test the hypothesis that long-term mild sleep restriction (SR), as occurs frequently in adults and adolescents, leads to a positive energy balance and weight gain. Aim 1. To determine the effects of SR, relative to habitual sleep (HS), on food choice and energy intake (EI) in adults at risk of obesity. - Hypothesis 1a. EI, assessed by multiple weekly 24-hour recalls, will be greater during a period of SR relative to HS. This will be mostly due to increased fat and carbohydrate intakes. - Hypothesis 1b. Neuronal responses to food stimuli, assessed by functional MRI (fMRI) after 6 weeks of SR or HS, will indicate increased activity in networks associated with reward and food valuation (insula, orbitofrontal cortex) during a period of SR relative to HS. These responses will be correlated with intakes of high carbohydrate and high fat foods (hypothesis 1a) and neuropeptide Y (NPY). Moreover, activation of the default mode network (DMN) will be suppressed to a lesser extent after SR compared to HS. Aim 2. To determine the effects of SR, relative to HS, on energy expenditure (EE) via independent and complementary approaches. - Hypothesis 2a. EE, assessed by doubly-labeled water (DLW), and physical activity level, monitored daily by actigraphy, will be lower during SR relative to HS. - Hypothesis 2b. Brown adipose tissue (BAT), assessed by positron emission tomography and magnetic resonance combined scanner (PET/MR) using 18F-fluorodeoxyglucose (18FDG-PET) and fat fraction (FF) measurement under cold stimulation, will be greater after SR relative to HS. This would suggest higher adaptive thermogenesis after SR compared to HS. BAT activation will also be correlated with NPY. Aim 3. To determine whether SR alters body weight and adiposity relative to HS. - Hypothesis 3a. SR will lead to weight gain and increased total adiposity, as assessed using magnetic resonance imaging (MRI), relative to HS. - Hypothesis 3b. Increased adiposity after SR will be correlated to an adverse cardio-metabolic risk profile (increased glucose, insulin, triglycerides, leptin, reduced high-density lipoprotein cholesterol and adiponectin) and neuronal responses to food stimuli (Hypothesis 1b), and EE (Hypothesis 2a & 2b). Failure to stimulate BAT with SR will be associated with greater gain in adiposity.
This project proposes to both develop and test adaptive automation countermeasures for the effects of stressors such as sleep deprivation (SD) on human performance related to robotic tasks, and investigate the relationship between human trust and appropriate use of these countermeasures.
The purpose of this study is to assess the impact of sleep deprivation on subjective inspiratory endurance in healthy subjects.
The purpose of the current proposal will be to examine the clinical performance of both physicians in training as well as experienced faculty in pre and post call situations. Groups will be matched for gender, age, experience and employment duration during regular hours versus immediate post call hour.
The purpose of this pilot study is to assess the impact of sleep workshops on sleep, mood, anxiety and well-being measures in a sample of college students. College students have a high prevalence of sleep problems including poor sleep hygiene, volitional sleep deprivation, and insomnia. Sleep disorders in college students negatively affect mood, social functioning, physical safety, and academic performance. Rarely recognized by the students themselves, these conditions are therefore often untreated. Participants in this study will be randomly assigned to receive the College Sleep Improvement Plan (C-SIP) or a control session. Participants will be asked to track their sleep as well as complete questionnaires; a subset of participants will be asked to wear an activity monitor.
Stellate-ganglion block have been done safely for more than 60 years. It has proved to provide survivors of breast cancer with relief from hot flushes and sleep dysfunction with few or no side-effects. The aim of the present study is to evaluate postoperative sleep quality of patients undergoing breast cancer surgery with Stellate-ganglion block performed in the operation.
Sleep deprivation is common in anaesthesiology residents. Its effects on technical skills have been reported with controversial results. Non-technical skills (team working, situation awareness, decision making and task management) contribute to safe and efficient task performance. They have a crucial role in anaesthetic practice, especially during crisis management. The investigators hypothesized that sleep deprivation was associated with a reduced mobilisation of non-technical skills in anaesthesiology residents.
This project investigated how glucose metabolism differs due to sleep deprivation for three consecutive nights as compared to sufficient sleep for three nights by examining concentrations of glucose, insulin, and other factors involved in glucose metabolism.