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Sleep deprivation makes you angrier by disrupting brain control
New research confirms sleep deprivation triggers anger by disrupting the brain's ability to regulate emotions via the amygdala and prefrontal cortex.
videoEffects of sleep deprivation: from craving carbs to health risks
In an experiment to understand the impact of sleep deprivation, ABC News correspondent Dan Child stayed awake for 50 consecutive…
videoMicro sleeps highlight the dangers of sleep deprivation
Micro sleeps are brief moments when the brain involuntarily shuts down, leading to lapses in awareness that are nearly impossible…
Adults should aim for 7 or more hours of sleep to maintain optimal health
Experts recommend at least 7 hours of sleep for adults to avoid health risks like obesity and heart disease. Sleeping less than 7 hours harms the body.
Chronic alcohol use disrupts sleep, contributing to dependence and relapse risk
Chronic alcohol use creates long-lasting changes in sleep architecture that persist even after abstinence. Alcohol initially reduces sleep latency and enhances slow-wave sleep, but later disrupts sleep quality. These sleep disturbances, especially insomnia and REM sleep abnormalities, significantly increase relapse risk in alcohol dependence. Treating sleep disorders may improve recovery outcomes.
Caffeine disrupts sleep even when taken 6 hours before bedtime
A study found that consuming 400 mg of caffeine (equivalent to approximately 3-4 cups of coffee, depending on size and type) even 6 hours before bedtime significantly disrupts sleep, reducing total sleep time by over an hour. Participants often underestimated these effects, with objective measures showing greater disruption than subjective reports. These findings support avoiding caffeine at least 6 hours before sleep.
Both short and long sleep durations linked to higher risk of cardiovascular-related mortality
A large-scale study of 135,000 participants shows that sleeping too little or too much is associated with an increased risk of cardiovascular death. The Multiethnic Cohort Study reveals a U-shaped risk pattern.
Shift work and sleep disorders increase health risks and accident likelihood
Shift work can disrupt circadian timing and shorten sleep, which is linked to fatigue, reduced alertness, and higher accident risk. Evidence also links night and rotating shift work to modestly higher cardiovascular risk, while cancer evidence is mixed and depends on exposure definitions.
Heart rate dynamics reveal strong interaction between sleep stages and autonomic nervous system in sleep apnea patients
A study published in Neuropsychopharmacology reveals how heart rate variability changes across sleep stages and how sleep apnea disrupts this balance. Evidence suggests distinct brain systems control sleep and wakefulness.