Researchers tested whether introducing light into the bedroom before waking would improve morning wakefulness and found an amount of time that seems to help fight off fatigue and raise alertness most.
Healthy sleep includes multiple components, such as number of hours of sleep per night, how long it takes to fall asleep, daytime functioning and self-reported sleep satisfaction, and addressing these different dimensions of sleep may...
A new study suggests that perceived stress and depression factor into the relationship between insomnia and hazardous drinking -- perhaps not a surprise. But because the relationship between insomnia and heavy drinking goes in both...
A collaborative study found that while sleep duration recovers quickly, sleep timing and sleep architecture can take significantly longer to realign when traveling across time zones.
Patients prescribed medicinal cannabis in Australia maintained improvements in overall health-related quality of life (HRQL), fatigue, and sleep disturbance across a one-year period, according to a new study. Anxiety, depression,...
Excessive screen time among adolescents negatively impacts multiple aspects of sleep, which in turn increases the risk of depressive symptoms -- particularly among girls, concludes a new study.
New research reveals that lower proportions of specific sleep stages are associated with reduced brain volume in regions vulnerable to the development of Alzheimer's disease over time.
Fruit fly mutants that have severe sleep deficits perform better at olfactory learning and memory tasks, according to a new study. The paradox of enhanced memory despite sleep loss could be explained by protein kinase A (PKA) signaling...
For women in their 80s, experiencing increasing sleepiness during the day over a five-year period is associated with double the risk of developing dementia during that time, according to a new study. The study does not prove that daytime...
Mindfulness, total sleep quality, and alcohol consumption may help explain why people who stay up late have a greater risk of depression, according to a new study.
Researchers have developed a powerful AI tool, built on the same transformer architecture used by large language models like ChatGPT, to process an entire night's sleep. To date, it is one of the largest studies, analyzing 1,011,192...
For people with a certain sleep disorder, a simple blood test could help predict the development of dementia years before symptoms appear, a new study indicates. Idiopathic REM sleep behavior disorder (iRBD) causes people to physically...
The body's internal clock doesn't just dictate when we sleep -- it also determines how quickly our muscles heal. A new study in mice suggests that muscle injuries heal faster when they occur during the body's natural waking hours.
For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A look under the eyelids showed them that more happens in the brain during sleep than was previously assumed.
Researchers have found that women who exhibit disturbed eating behaviors and engage in low physical activity tend to have more central body fat and a higher risk of metabolic low-grade inflammation. This condition increases the risk of...
Overnight bursts of brain waves seen in normal sleep can help doctors predict which unresponsive patients hospitalized with acute severe brain injuries will awaken and eventually recover.
Blue-enriched light can improve sleep quality and daily activity in older adults living at home, according to new research. Researchers found that this type of light therapy led to greater daytime activity, earlier bedtimes, regular...
The causes of obesity are complex and influenced by many factors. While research has highlighted connections between sleep, eating patterns and weight gain, scientists remain uncertain of the role of the circadian system -- the...
Research in fruit flies has identified specific groups of cholinergic brain cells that are involved in alcohol-induced insomnia. This work could ultimately lead to targeted treatments for alcohol-related sleep loss, helping people...
Researchers have uncovered how perceptual memories linked to positive emotions, such as joy or happiness, are strengthened during sleep. The study could help scientists understand the neurological basis for overcoming conditions like...
When young adults start working, the amount of daily physical activity they do increases sharply, only to fall away again over the new few years, while the amount of sleep they get falls slightly, according to new research. The largest...
A brain rhythm working in tandem with the body's natural sleep-wake cycle may explain why bipolar patients alternate between mania and depression, according to new research. A new study marks a breakthrough in understanding what drives...
The prevalence of diagnosed disorders from recurrent use of sedative, hypnotic and anti-anxiety medications in adolescents and young adults has increased sharply since 2001, according to researchers. Their study examined diagnoses of...
Waking up does not activate an increase in the release of the stress hormone cortisol. Cortisol does, however, increase in the hours prior to wakening as part of the body's preparation for the next day, new research has found.
A good night's sleep does more than just help you feel rested--it might literally clear your mind. A new study shows how deep sleep may wash away waste buildup in the brain during waking hours, an essential process for maintaining brain...
A collaborative effort has shed valuable light on how monoamine neurotransmitters such as serotonin, dopamine, and now histamine help regulate brain physiology and behavior through chemical bonding of these monoamines to histone...
A new study examined data from more than 1,000 workers over a 10-year period. Sedentary workers experience a 37% increase in insomnia-like symptoms. Employees working nontraditional schedules experience a 66% greater risk of needing...
People with breathing problems during sleep may have a larger hippocampus, the area of the brain responsible for memory and thinking, according to a new study. The study, which included mostly Latino people, also found that those with...
Just as a conductor coordinates different instruments in an orchestra to produce a symphony, breathing coordinates hippocampal brain waves to strengthen memory while we sleep, reports a new study. This is the first time breathing rhythms...
It has been known for nearly 20 years that slow, synchronous electrical waves in the brain during deep sleep support the formation of memories. Why that is was previously unknown. Now, a team of researchers posits an explanation....
Sleep is critical for all sorts of reasons, but a team of international scientists has discovered a new incentive for getting eight hours of sleep every night: it helps the brain to store and learn a new language.
Circadian clocks control physiological processes and behavior in virtually all living organisms. Now an international research team has created a detailed map of the internal clock in the brain of the fruit fly.
Being lonely is a bigger hurdle to a good night's sleep for college students than too much time at a computer or other electronic screen, a new study suggests.
A research group has discovered that in mammals, a protein kinase A (PKA) promotes wakefulness, while protein phosphatase 1 (PP1) and calcineurin promote sleep. This study revealed that the balance between sleep and wakefulness is...
You may have heard sleep described as something of a magic pill for the body. With the right amount, timing, and quality, it can work wonders -- strengthen the immune system, improve blood sugar, even decrease the risk of heart attacks...
While it's well known that sleep enhances cognitive performance, the underlying neural mechanisms, particularly those related to nonrapid eye movement (NREM) sleep, remain largely unexplored. A new study has nonetheless uncovered a key...
Adolescents who snore frequently were more likely to exhibit behavior problems such as inattention, rule-breaking, and aggression, but they do not have any decline in their cognitive abilities, according to a new study. This is the...
Have you ever felt sluggish and out of sorts after a long-haul flight or a late-night shift? A new study has found that disruptions to our body clock, such as those experienced during jetlag, impact our metabolism -- but to a lesser...
Scientists reveal how sleep, especially naps, boosts motor learning after TBI, offering new insights into brain activity and rehabilitation strategies to enhance recovery outcomes.