Active clinical trials for "Sleep Deprivation"

The aim of the study was to asses the effect of sleep deprivation during nightshift by monitoring 30 surgeons in unit of surgical gastroenterology in 4 consecutive days. The first day was pre call= day 1, second day was on call= day 2, third day was the first post call day = day 3 and fourth day was the second post call= day 4. The surgeons were monitored in order to asses how performance was on call compared to pre call and post call. The hypothesis was that they would perform worse on call than pre call, and again slightly worse post call.

hypothesis: sleep restriction in healthy subject trigger alteration of decision making associated with immuno-inflammatory changes inclusion criterias: healthy subjects, men, under 35 years, BMI<26, no sleep troubles, intermediate chronotype design: 12 subjects, longitudinal study 2 days of baseline, 7 night of sleep restriction (4h sleep/night), recovery (1, 2, 3 and 9 normal sleep nights). parameters: decision making tests, reaction time, wakefulness test, biological parameters (cathecholamines, pro-inflammatory cytokines...), heart rate, blood pressure control of sleep restriction: continuous polysomnographic survey

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 investigator showed that a night of sleep deprivation halved the duration of an inspiratory endurance test and that this loss of endurance could be secondary to a lack of activation of the pre-motor cortex. However, the inspiratory endurance test is associated with a feeling of dyspnea that could lead to premature arrest, and the inspiratory drive is complex, both automatic and voluntary. The investigator can reproduce this results on a simpler drive. During the execution of an exercise involving repeated contractions of the hand it is possible to record the activation of the pre-motor cortex corresponding to the phase of preparation of the movement. The amplitude of these premotor potentials is proportional to the developed motive force. The purpose of this study is to assess the impact of sleep deprivation on the muscular endurance of non-dominant in healthy subjects. Hypothesis: Sleep deprivation causes a decrease in manual motor endurance by decreasing cortical pre-motor control. Main objective: To compare the motor endurance of healthy subjects after a night's sleep and after a sleepless night. Secondary objective: To compare the amplitude of premature cortical control at the beginning of the endurance test after a night's sleep and after a sleepless night.

The purpose of this study is to assess the impact of sleep deprivation on subjective inspiratory endurance in healthy subjects.

The overall goal of this research is to elucidate how environmental, healthcare, and patient-level factors and patients' level of perceived control impact sleep duration and quality in hospitalized older patients and to assess whether better in-hospital sleep is associated with improved physical activity and health outcomes. We hypothesize that environment, healthcare disruptions and patient symptoms will be significantly associated with objective and subjective sleep duration and sleep quality in hospitalized older patients. We also hypothesize that a high level of perceived control will be associated with improved sleep duration and quality in hospitalized older patients. We further hypothesize that shorter sleep duration and quality in hospitalized older adults will be associated with adverse health outcomes, namely higher blood pressure and blood sugar.

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.

To examine the neurobehavioural responses to two successive cycles of sleep restriction and recovery in adolescents, and to determine the benefits of napping on cognitive performance, alertness, and mood. 57 participants, aged 15 to 19 years old, were divided into nap and no-nap groups. Both groups underwent two cycles of sleep restriction and recovery over 15 days. The nap group received an afternoon sleep opportunity lasting 1 hour.

Work requirements for medical trainees result in substantial sleep loss. Sleep loss has been associated with increased levels of certain inflammatory hormones that could have negative impact on blood vessel function. The purpose of this study is to determine the effects of sleep loss on blood hormone levels and blood vessel function in medical trainees.

The primary purpose of this study is to explore the underlying mechanisms that link sleep to Alzheimer's disease (AD), with special focus on the clearance of metabolites in the extracellular space of the brain during sleep. Subjects will wear an actigraph for 1 week to determine regular daytime activity and sleep patterns. Subjects will then undergo partial sleep deprivation followed by 4 hours of in-lab nocturnal polysomnography (NPSG). Participants will be be asked to stay awake and active all day after the partial sleep deprivation with a new actigraphy secured by a hospital band to assure participants remain awake. They will seep inside an MRI machine for 90 minutes on the following night during their usual bedtime (established by 1 week actigraphy study.) Morphologic imaging, flow imaging and diffusion kurtosis imaging (DKI) will be performed on a 3T Siemens scanner.